Select a set of tags to display all problems with at least 1 of those tags
|
Problem ID
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Your Score
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Title
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Source
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Problem Type
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#ACs
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|---|---|---|---|---|---|
| trickortreat | N/A | trickortreat | Unknown Source | Batch | 1 |
| fans | N/A | fans | Unknown Source | Batch | 2 |
| buildingfences | N/A | buildingfences | Unknown Source | Batch | 2 |
| gather_ex | N/A | gather_ex | SEATST 2026 except C[i] is big | Interactive | 1 |
| triplecircuit_ex | N/A | Triple Circuit but you only have L = 213 gates | SEATST 2026 (buffed by ChatGPT) | Batch | 2 |
| wateringplants | N/A | wateringplants | EGOI 2026 (Day 2) | Batch | 4 |
| ferriswheel | N/A | ferriswheel | EGOI 2026 (Day 1) | Batch | 6 |
| foxfamilies | N/A | Fox Families | EGOI 2026 (Day 2) | Batch | 3 |
| dango | N/A | Legendary Dango Eater | JOISC 2026 (Day 1) | Batch | 1 |
| gather | N/A | Car Gathering | SEATST 2026 (Day 2) | Interactive | 4 |
| teleport | N/A | XOR Teleport | SEATST 2026 (Day 1) | Interactive | 5 |
| trip | N/A | Trip | SEATST 2026 (Day 2) (TheRaptor) | Interactive | 4 |
| exam2 | N/A | Two Exams | SEATST 2026 (Day 1) | Interactive | 8 |
| dogfood | N/A | dogfood | HCI 2026 EC³ Beginner Contest (Mimikyu) | Batch | 7 |
| country | N/A | Country | SEATST 2026 (Day 1) | Interactive | 7 |
| logodesign | N/A | Logo Design | HCI 2026 EC³ Beginner Contest (Dolphy) | Batch | 10 |
| trials | N/A | The Trials of EC3 | HCI 2026 EC³ Beginner Contest (shenshiqi) | Batch | 21 |
| legotowers | N/A | legotowers | HCI 2026 EC³ Beginner Contest (shenshiqi) | Batch | 10 |
| teleporter2 | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming Teleporter 2 | JOISC 2026 | Batch | 2 |
| triplecircuit | N/A | Triple Circuit | SEATST 2026 (Day 2) | Batch | 6 |
| bike | N/A | ⓘTags: Greedy, Trees Bike | APIO 2026 | Interactive | 1 |
| navigation | N/A | Navigation | APIO 2026 | Interactive | 0 |
| tsukuyomi | N/A | tsukuyomi | 2017 JOISC Modified (WH8) | Batch | 1 |
| uiro | N/A | ⓘTags: Data Structures, Greedy uiro | JOISC 24/25 | Batch | 3 |
| littlejohnny6 | N/A | littlejohnny6 | Unknown Source (PlayVoltz) | Interactive | 11 |
| specialcells | N/A | ⓘTags: Dynamic Programming specialcells | Unknown Source (pmn) | Batch | 5 |
| cakes | N/A | Cakes | EGOI 2026 (Day 2) | Batch | 3 |
| hogdog | N/A | ⓘTags: Greedy Hogs and Dogs | HCI 2026 EC³ Beginner Contest (Dolphy) | Batch | 21 |
| biscuits2 | N/A | Biscuits | EGOI 2026 (Day 1) | Batch | 3 |
| ihate7 | N/A | ihate7 | HCIRS CP CCA Contest (blackscreen1) | Batch | 6 |
| arrayqueries | N/A | ⓘTags: Greedy arrayqueries | Classic Problem (pxsit) | Batch | 4 |
| cutbyhalf | N/A | ⓘTags: Greedy cutbyhalf | Classic Problem (pasit) | Batch | 4 |
| cat | N/A | cat | TOI22 Day 2 | Interactive | 3 |
| market | N/A | market | TOI22 Day 2 | Interactive | 2 |
| elephant | N/A | Elephant | TOI22 Day 1 | Communication | 4 |
| bakshin | N/A | Bakshin | TOI22 Day 1 | Interactive | 2 |
| phimai | N/A | Phimai | TOI22 Day 1 | Interactive | 2 |
| odometer | N/A | Pebbling odometer | IOI 2012 | Batch | 1 |
| language | N/A | ⓘTags: Information Theory Languages | IOI 2010 (Modified) | Interactive | 2 |
| seventeen | N/A | ⓘTags: Joke seventeen | Unknown Source (Dolphy) | Batch | 5 |
| comments | N/A | ⓘTags: Joke comments | Unknown Source | Batch | 3 |
| artclass | N/A | ⓘTags: Information Theory Art Class | IOI 2013 (Day 1) | Interactive | 12 |
| digits3 | N/A | ⓘTags: Information Theory Digits | NOI Practice Tasks (ryangohca) | Interactive | 8 |
| lemon | N/A | ⓘTags: Information Theory lemon | NOI 2026 Finals (TheRaptor, zyq69) | Interactive | 7 |
| gemstones | N/A | ⓘTags: Adhoc gemstones | NOI 2026 Finals (TheRaptor) | Batch | 16 |
| 3raptors | N/A | ⓘTags: Data Structures 3raptors | NOI 2026 Finals (TheRaptor) | Batch | 25 |
| famishedcats | N/A | ⓘTags: Greedy famishedcats | NOI 2026 Finals (JustKitkat) | Batch | 43 |
| monkeys | N/A | ⓘTags: Line Sweep/Sliding Window monkeys | NOI 2026 Finals (oolimry) | Batch | 73 |
| tallbarn_usaco | N/A | ⓘTags: Binary Search, Greedy Building a Tall Barn | USACO 2017 (Modified) | Batch | 6 |
| stonearranging2 | N/A | ⓘTags: Adhoc Stone Arranging 2 | JOI Final Contest 2023 | Batch | 15 |
| snakes_usaco | N/A | snakes_usaco | USACO 2019 (Modified) | Batch | 6 |
| cycle_ioi19 | N/A | ⓘTags: Adhoc, Binary Search, Information Theory Lost in the cycle | IOI 2019 Practice Tasks | Interactive | 9 |
| upsanddownsofinvesting | N/A | ⓘTags: Adhoc, Syntax upsanddownsofinvesting | CS3233 Homework (Buffed) | Batch | 3 |
| area2 | N/A | ⓘTags: Syntax Area 2 | NOI 2026 Qualification Contest (zyq69) | Batch | 186 |
| ring2 | N/A | ⓘTags: Data Structures, Divide and Conquer, Graph Theory Mushroom Ring | NOI 2026 Qualification Contest (cstuart) | Batch | 19 |
| hungrycats2 | N/A | ⓘTags: Adhoc, Syntax Hungry Cats | NOI 2026 Qualification Contest (JustKitkat) | Batch | 152 |
| airplane2 | N/A | ⓘTags: Binary Search Airplane 2 | NOI 2026 Qualification Contest (Pan) | Batch | 107 |
| digits2 | N/A | ⓘTags: Brute Force, Graph Theory, Math Digits | NOI 2026 Qualification Contest (Shadow1) | Batch | 62 |
| easyquestion | N/A | Easy Question | Codebreaker Cancer Contest 2026 (popperoni) | Batch | 4 |
| segtreebeats | N/A | ⓘTags: Data Structures segtreebeats | Classic Problem | Batch | 9 |
| fibo_ex | N/A | fibo_ex | April Fools 2026 (bribritt) | Batch | 26 |
| integer | N/A | ⓘTags: Joke Integer | April Fools 2026 (bribritt) | Interactive | 13 |
| summarising2025 | N/A | ⓘTags: Adhoc, Graph Theory summarising2025 | Hello 2026 | Batch | 8 |
| barbecue | N/A | ⓘTags: Greedy barbecue | Dec Course 2025 Advanced Final Contest (sporknives) | Batch | 74 |
| kangaroohunt | N/A | ⓘTags: Information Theory kangaroohunt | Dec Course 2025 Advanced Final Contest (Dolphy) | Interactive | 46 |
| badcontest | N/A | ⓘTags: Syntax Bad Contest | Dec Course 2025 Elementary Final Contest (shoryu386) | Batch | 74 |
| connections | N/A | connections | Hello 2026 (blackscreen1, bluescreen2, YSH2020) | Batch | 3 |
| xorinversions | N/A | XOR inversions | Dec Course 2025 Advanced Final Contest (gohchingjayk) | Batch | 24 |
| quest | N/A | ⓘTags: Bitmask, Brute Force, Dynamic Programming, Greedy Monkey Quest | Dec Course 2025 Elementary Final Contest (Pan) | Batch | 9 |
| moneylaundering | N/A | ⓘTags: Dynamic Programming Money Laundering | Dec Course 2025 Elementary Final Contest (nminhnguyenle) | Batch | 11 |
| lasers3 | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming, Trees Lasers 3 | Dec Course 2025 Advanced Final Contest (TheRaptor) | Batch | 14 |
| cardplacing | N/A | ⓘTags: Adhoc, Syntax cardplacing | Dec Course 2025 Elementary Final Contest (sporknives) | Batch | 39 |
| blockrain | N/A | ⓘTags: Adhoc, Data Structures Block Rain | Dec Course 2025 Advanced Final Contest (Tyx2019) | Batch | 3 |
| deccourse2025 | N/A | ⓘTags: Joke, Syntax deccourse2025 | Dec Course 2025 Advanced Final Contest (akqxolotl, blackscreen1, bribritt, Hijackedsoul, hmm, JustKitkat, Pan, PlayVoltz, penguin133, popperoni, ryangohca, Sans12345, Shadow1, shoryu386, siewjh, Tyx2019, WH8, wongyikai, yhkhoo, YSH2020) | Batch | 181 |
| hld_easy_2 | N/A | ⓘTags: Data Structures, Trees HLD (Nodes) | Classic Problem | Batch | 29 |
| nerdchef | N/A | Nerd Chef | Kattis | Batch | 27 |
| dystopia | N/A | Dystopian Cities | Codeforces 1213G | Batch | 24 |
| shamelessad6 | N/A | ⓘTags: Joke, Syntax shamelessad6 | Duck Duck Code (oolimry) | Batch | 39 |
| roadconstruction | N/A | roadconstruction | CSES | Batch | 37 |
| swapgame | N/A | swapgame | CSES | Batch | 26 |
| platonic33 | N/A | platonic33 | Codeforces Round 1025 2D | Batch | 6 |
| duckhunt42 | N/A | The answer to life, the universe, and everything | Classic Problem | Batch | 45 |
| kovanice | N/A | ⓘTags: Graph Theory kovanice | COI 2015 | Batch | 19 |
| hld_easy | N/A | ⓘTags: Data Structures, Trees HLD (Edges) | Classic Problem | Batch | 22 |
| platonic32 | N/A | platonic32 | Codeforces Round 124 1B | Batch | 11 |
| duckhunt41 | N/A | Duck Hunt 41 | Classic Problem | Batch | 37 |
| platonic31 | N/A | ⓘTags: Dynamic Programming Platonic Duckhunt II | COCI 2014/2015 (modified) | Batch | 17 |
| platonic30 | N/A | ⓘTags: Dynamic Programming Platonic Sequences | China NOIP 2001 | Batch | 39 |
| duckhunt40 | N/A | ⓘTags: Dynamic Programming, Graph Theory Duck Hunt 40 | BlahajCTF Qualifiers (modified) | Batch | 13 |
| duckhunt39 | N/A | ⓘTags: Dynamic Programming Duck Hunt 39 | Luogu P2800 | Batch | 29 |
| duckhunt38 | N/A | duckhunt38 | Unknown Source | Batch | 20 |
| platonic29 | N/A | ⓘTags: Dynamic Programming platonic29 | Unknown Source | Batch | 34 |
| platonic28 | N/A | Platonic Collecting | Unknown Source | Batch | 18 |
| platonic27 | N/A | Platonic Duckhunt | Unknown Source | Batch | 30 |
| platonic26 | N/A | platonic26 | Codeforces 1829F | Batch | 32 |
| duckhunt37 | N/A | duckhunt37 | Unknown Source | Batch | 12 |
| duckhunt67 | N/A | ⓘTags: Dynamic Programming Duck Hunt 67 | Classic Problem (bribritt) | Batch | 68 |
| mosaic3 | N/A | ⓘTags: Adhoc, Dynamic Programming, Trees I need to stop proposing mosaics | IOI 2024 (modified) (bribritt) | Interactive | 4 |
| platonic23 | N/A | ⓘTags: Binary Search Platonic Bouquet | Unknown Source (popperoni) | Batch | 38 |
| platonic22 | N/A | ⓘTags: Binary Search Platonic Clocks | Unknown Source (popperoni) | Batch | 45 |
| platonic24 | N/A | ⓘTags: Binary Search Platonic Cathouse | Classic Problem (popperoni) | Batch | 14 |
| platonic25 | N/A | ⓘTags: Binary Search Platonic Cathouse II | Codeforces 1132D | Batch | 8 |
| platonic19 | N/A | ⓘTags: Graph Theory, Trees Platonic Paths | Dec Course 2025 Advanced Contest 7 (Trees II) (blackscreen1) | Batch | 12 |
| duckhunt36 | N/A | ⓘTags: Dynamic Programming, Math, Trees duckhunt36 | Codeforces 1856E | Batch | 11 |
| platonic20 | N/A | ⓘTags: Adhoc, Greedy Platonic Presents III | Codeforces 1385C | Batch | 25 |
| platonic21 | N/A | ⓘTags: Greedy Platonic Dates | Codeforces 479C | Batch | 22 |
| duckhunt34 | N/A | ⓘTags: Data Structures, Greedy duckhunt34 | Codeforces 1969D | Batch | 6 |
| duckhunt33 | N/A | ⓘTags: Bitmask, Brute Force Duck Hunt 33 | ABC 264C | Batch | 13 |
| duckhunt32 | N/A | ⓘTags: Brute Force, Syntax Duck Hunt 32 | JOIG 2021 | Batch | 58 |
| duckhunt35 | N/A | ⓘTags: Trees duckhunt35 | Codeforces 2133E | Batch | 9 |
| childsetter6 | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees childsetter6 | ABC 387F | Batch | 17 |
| littlejohnny4 | N/A | littlejohnny4 | Classic Problem (PlayVoltz) | Batch | 17 |
| javier_the_dungeon_newbie_ex | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees javier_the_dungeon_newbie_ex | CatOI 2025 Reserves (YH) | Batch | 7 |
| littlejohnny1 | N/A | littlejohnny1 | Classic Problem (PlayVoltz) | Batch | 58 |
| platonic18 | N/A | ⓘTags: Trees Platonic Removal | Dec Course 2025 Advanced Contest 6 (Trees I) (blackscreen1) | Batch | 17 |
| species | N/A | ⓘTags: Dynamic Programming, Math Monkey Species | ABC 435G | Batch | 4 |
| duckhunt31 | N/A | duckhunt31 | Luogu P1295 | Batch | 15 |
| engineers | N/A | ⓘTags: Line Sweep/Sliding Window, Trees engineers | RMI 2025 | Interactive | 4 |
| littlejohnny3 | N/A | littlejohnny3 | Classic Problem (PlayVoltz) | Batch | 49 |
| littlejohnny2 | N/A | littlejohnny2 | Classic Problem (PlayVoltz) | Batch | 51 |
| offerings | N/A | offerings | Codeforces 2175D | Batch | 8 |
| littlejohnny5 | N/A | littlejohnny5 | Codeforces 2117C | Batch | 28 |
| resolution | N/A | New Year Resolution | Meta Hackercup 2025 Round 3B | Batch | 7 |
| platonic17 | N/A | Platonic Cuddling | JOIG 2023 | Batch | 35 |
| platonic16 | N/A | ⓘTags: Adhoc, Greedy, Math Platonic Tower | Classic Problem in China, Probably (popperoni) | Batch | 42 |
| navigation2 | N/A | navigation2 | JOI Spring Camp 2021 | Communication | 6 |
| monkeyjourney | N/A | ⓘTags: Data Structures, Dynamic Programming Monkey Journey | ABC 362E | Batch | 35 |
| turbo | N/A | ⓘTags: Adhoc, Constructive Algorithms Turbo the Snail | IMO 2024 | Interactive | 12 |
| littlejohnny0 | N/A | littlejohnny0 | Codeforces 1058A (Modified) | Interactive | 23 |
| duckhunt30 | N/A | duckhunt30 | MarisaOJ (Modified) | Batch | 29 |
| monkeycity | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window Monkey City | Codeforces 1313C2 | Batch | 9 |
| ponschool | N/A | ⓘTags: Data Structures, Greedy Ponteng School | ABC 333E | Batch | 21 |
| duckhunt22 | N/A | ⓘTags: Greedy duckhunt22 | CF 1791E | Batch | 63 |
| installingapps_ex | N/A | ⓘTags: Greedy installingapps_ex | NWERC 2017 (buffed) | Batch | 24 |
| duckhunt24 | N/A | ⓘTags: Dynamic Programming, Syntax Duck Hunt 24 | Classic problem (bribritt) | Batch | 69 |
| duckhunt29 | N/A | Duck Hunt 29 | Codeforces 1010B | Interactive | 55 |
| duckhunt28 | N/A | Duck Hunt 28 | CF 1709B | Batch | 37 |
| duckhunt27 | N/A | Duck Hunt 27 | ABC 408C | Batch | 52 |
| railgun | N/A | A Certain Scientific Railgun | China NOI 2016 | Batch | 19 |
| duckhunt25 | N/A | ⓘTags: Greedy duckhunt25 | CF 1500C | Batch | 8 |
| playlist2 | N/A | ⓘTags: Data Structures, Syntax Monkey Playlist | Classic Problem (Pan) | Batch | 64 |
| duckhunt23 | N/A | ⓘTags: Greedy duckhunt23 | Malaysian Computing Challenge 2025 | Batch | 40 |
| rewiring | N/A | Rewiring: You Can (Not) Return | Codeforces 1469F | Batch | 18 |
| convergence | N/A | Timeline Convergence: Arclight of the Point at Infinity | JOI Open 2025 | Batch | 6 |
| notduckhunt | N/A | ⓘTags: Binary Search, Math notduckhunt | CF1486D | Batch | 50 |
| stamps2 | N/A | ⓘTags: Line Sweep/Sliding Window, Math stamps2 | JOISC 2024-2025 | Batch | 7 |
| platonic15 | N/A | ⓘTags: Math, Syntax Platonic Gifting (ex) | Dec Course 2025 Elementary Contest 3 (STL Functions + Precomputation) (blackscreen1) | Batch | 17 |
| duckhunt21 | N/A | ⓘTags: Brute Force, Math, Meet in the Middle duckhunt21 | ABC427F | Batch | 27 |
| platonic14 | N/A | ⓘTags: Constructive Algorithms, Math, Syntax Platonic Ring | Dec Course 2025 Elementary Contest 2 (Big O + Problem Solving) (blackscreen1) | Batch | 14 |
| duckhunt20 | N/A | ⓘTags: Adhoc, Bitmask, Data Structures, Math duckhunt20 | Indonesian NOI 2025 (buffed) (YSH2020, Tyx2019) | Batch | 6 |
| platonic13 | N/A | ⓘTags: Math, Syntax Platonic Virus | Dec Course 2025 Elementary Contest 2 (Big O + Problem Solving) (blackscreen1) | Batch | 41 |
| platonic11 | N/A | Platonic Presents II | Dec Course 2025 Elementary Contest 2 (Big O + Problem Solving) (popperoni) | Batch | 80 |
| platonic12 | N/A | ⓘTags: Math, Syntax Platonic Gifting | Dec Course 2025 Elementary Contest 2 (Big O + Problem Solving) (blackscreen1) | Batch | 48 |
| platonic10 | N/A | ⓘTags: Math, Syntax Platonic Factorial | Dec Course 2025 Elementary Contest 2 (Big O + Problem Solving) (popperoni) | Batch | 132 |
| factorial_ex | N/A | ⓘTags: Explicitly Excluded (from IOI), Math, Syntax factorial_ex | Classic Problem??? (bribritt) | Batch | 11 |
| usefft5 | N/A | ⓘTags: Adhoc, Brute Force usefft5 | Dec Course 2025 Elementary Contest 3 (bribritt) | Batch | 30 |
| platonic9 | N/A | ⓘTags: Syntax Platonic Reversing | Dec Course 2025 Lecture 2 (Big O Complexity + Algorithmic Thinking) (popperoni) | Batch | 115 |
| catbot | N/A | ⓘTags: Joke catbot | Unknown Source | Batch | 5 |
| jokers | N/A | ⓘTags: Binary Search, Greedy jokers | Singapore Informatics League 2025 (shoryu386) | Batch | 28 |
| musicalchairs | N/A | ⓘTags: Greedy musicalchairs | Singapore Informatics League 2025 (beepbeepsheep) | Batch | 18 |
| volcano | N/A | ⓘTags: Graph Theory volcano | Singapore Informatics League 2025 (oolimry) | Batch | 11 |
| carddraw | N/A | ⓘTags: Data Structures carddraw | Singapore Informatics League 2025 (shoryu386, penguin133) | Batch | 6 |
| cupstacking | N/A | ⓘTags: Adhoc, Greedy cupstacking | Singapore Informatics League 2025 (TheRaptor) | Batch | 15 |
| mad | N/A | ⓘTags: Adhoc Mildly Angry Ducks | Singapore Informatics League 2025 (TheRaptor) | Batch | 9 |
| tiktok | N/A | ⓘTags: Dynamic Programming Tick Tock | Singapore Informatics League 2025 (LCJLY) | Batch | 8 |
| mahjong | N/A | ⓘTags: Adhoc, Binary Search, Brute Force, Greedy mahjong | Singapore Informatics League 2025 (penguin133) | Batch | 5 |
| slimes2 | N/A | ⓘTags: Line Sweep/Sliding Window slimes2 | Singapore Informatics League 2025 (TheRaptor) | Batch | 8 |
| mountainrange2 | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming mountainrange2 | Singapore Informatics League 2025 (pavement) | Batch | 2 |
| badaddition | N/A | ⓘTags: Graph Theory, Math badaddition | Singapore Informatics League 2025 (oolimry) | Batch | 5 |
| companymanagement | N/A | ⓘTags: Dynamic Programming companymanagement | Singapore Informatics League 2025 (TheRaptor) | Batch | 6 |
| mixingsauces | N/A | ⓘTags: Math mixingsauces | Singapore Informatics League 2025 (oolimry) | Batch | 4 |
| reinforcement | N/A | ⓘTags: Binary Search, Graph Theory Reinforcement Learning | Dec Course 2025 Selection Test (hmm) | Batch | 20 |
| photofinish | N/A | ⓘTags: Adhoc photofinish | Dec Course 2025 Selection Test (siewjh) | Batch | 96 |
| monsters3 | N/A | ⓘTags: Binary Search, Data Structures Monsters 3 | Dec Course 2025 Selection Test (Shadow1) | Batch | 20 |
| funnyballs | N/A | ⓘTags: Constructive Algorithms, Greedy funnyballs | Dec Course 2025 Selection Test (Pan) | Batch | 95 |
| evenorodd_ex | N/A | ⓘTags: Syntax evenorodd_ex | Dec Course 2025 Selection Test (PlayVoltz) | Batch | 200 |
| stability | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming stability | HCI 2025 Novcourse Final Contest (blackscreen1) | Batch | 26 |
| bigrace | N/A | ⓘTags: Binary Search, Greedy bigrace | HCI 2025 Novcourse Final Contest (LCJLY) | Batch | 28 |
| sixseven | N/A | ⓘTags: Syntax 67 | HCI 2025 Novcourse Final Contest (shoryu386) | Batch | 209 |
| duckhunt19 | N/A | ⓘTags: Syntax duckhunt19 | HCI 2025 Novcourse Final Contest (Tyx2019) | Batch | 61 |
| colouredballs | N/A | ⓘTags: Data Structures colouredballs | HCI 2025 Novcourse Final Contest (WH8) | Batch | 14 |
| childsetter5 | N/A | ⓘTags: Binary Search, Greedy Child Problemsetter 5 | ABC 294 (modified) | Batch | 12 |
| bsta | N/A | ⓘTags: Binary Search, Greedy BSTA | Unknown Source (bribritt) | Batch | 16 |
| duckhunt18 | N/A | Duck Hunt 18 | ABC 373C / classic problem | Batch | 43 |
| bracketstack | N/A | bracketstack | ABC 428C | Batch | 8 |
| duckhunt17 | N/A | Duck Hunt 17 | ABC 403C (modified) | Batch | 17 |
| lcpupqst | N/A | ⓘTags: Data Structures Lazy Creation Point Update Point Query Segment Tree | RI November Course 2025 Contest 2 (bribritt) | Batch | 21 |
| summationfrenzy | N/A | summationfrenzy | Unknown Source | Batch | 29 |
| factorialfrenzy | N/A | factorialfrenzy | Unknown Source | Batch | 17 |
| platonic8 | N/A | ⓘTags: Adhoc, Binary Search, Brute Force, Constructive Algorithms, Divide and Conquer, Dynamic Programming, Information Theory Platonic Array | CatOI 2025 (Public Mirror) (popperoni, blackscreen1) | Interactive | 10 |
| platonic7 | N/A | ⓘTags: Graph Theory Platonic Merging | CatOI 2025 (Public Mirror) (blackscreen1, YH) | Batch | 23 |
| catproblemsetter | N/A | ⓘTags: Greedy catproblemsetter | CatOI 2025 (Public Mirror) (YH, popperoni) | Batch | 25 |
| aura | N/A | ⓘTags: Adhoc, Greedy Aura Plant | CatOI 2025 (Public Mirror) (HighLithop, popperoni) | Batch | 47 |
| candies3 | N/A | ⓘTags: Adhoc, Math, Syntax Candies | CatOI 2025 (Public Mirror) (StewartStudios, popperoni) | Batch | 75 |
| fuji | N/A | Mount Fuji | CatOI 2025 (Public Mirror) (HighLithop, popperoni) | Batch | 80 |
| catstaircase | N/A | ⓘTags: Adhoc, Line Sweep/Sliding Window, Math Cat Staircase | CatOI 2025 (Public Mirror) (newperson, popperoni) | Batch | 16 |
| platonic6 | N/A | ⓘTags: Adhoc, Syntax Platonic Drinks | CatOI 2025 (Public Mirror) (popperoni) | Batch | 103 |
| duckhunt16 | N/A | ⓘTags: Syntax Duck Hunt 16 | ABC 080 A | Batch | 88 |
| quantumcp | N/A | ⓘTags: Syntax Quantum Competitive Programming | RI November Course 2025 Contest 1 (bribritt) | Batch | 17 |
| duckhunt15 | N/A | Duck Hunt 15 | CF 2044A (modified) | Batch | 57 |
| calc | N/A | ⓘTags: Data Structures, Syntax calc | NAOI August 2025 (ilikeeggs) | Batch | 54 |
| bigredarrow | N/A | ⓘTags: Syntax bigredarrow | NAOI August 2025 (ilikeeggs) | Batch | 39 |
| matrixrotation | N/A | ⓘTags: Syntax matrixrotation | NAOI August 2025 (ilikeeggs) | Batch | 30 |
| eatinghealthy | N/A | ⓘTags: Syntax eatinghealthy | NAOI August 2025 (ilikeeggs) | Batch | 71 |
| i_am_steve | N/A | ⓘTags: Adhoc, Data Structures, Greedy i_am_steve | DHS Senior High Infocomm Club 2025 Term 3 C++ Quiz (averagejav, YH) | Batch | 36 |
| combostacking | N/A | ⓘTags: Greedy, Math combostacking | idk (blackscreen1) | Batch | 27 |
| evans_peculiar_hobby | N/A | ⓘTags: Adhoc, Greedy, Syntax evans_peculiar_hobby | DHS Senior High Infocomm Club 2025 Term 3 C++ Quiz (averagejav, YH) | Batch | 46 |
| lazy_robot | N/A | ⓘTags: Adhoc, Syntax lazy_robot | DHS Senior High Infocomm Club 2025 Term 3 C++ Quiz (YH) | Batch | 54 |
| el_classico | N/A | ⓘTags: Adhoc, Syntax el_classico | DHS Senior High Infocomm Club 2025 Term 3 C++ Quiz (YH) | Batch | 67 |
| monstergo | N/A | ⓘTags: Adhoc, Brute Force, Math Monster-Go | EGOI 2025 (Day 1) | Batch | 7 |
| triples | N/A | ⓘTags: Square Root Decomposition triples | IOI 2025 (Day 1) | Interactive | 2 |
| clearingleaves | N/A | ⓘTags: Dynamic Programming, Greedy Clearing Leaves | AOI 2025 Day 2 (shoryu386) | Batch | 7 |
| guardingtreasure | N/A | ⓘTags: Binary Search Guarding Treasure | AOI 2025 Day 2 (shoryu386) | Batch | 13 |
| aoi_game | N/A | ⓘTags: Adhoc, Syntax Game | AOI 2025 Day 2 (shoryu386) | Batch | 34 |
| bronzemedal | N/A | ⓘTags: Syntax Bronze Medal | AOI 2025 Day 2 (shoryu386) | Batch | 42 |
| obstacles_ioi25 | N/A | ⓘTags: Data Structures Obstacles for a Llama | IOI 2025 (Day 2) | Interactive | 3 |
| migrations | N/A | ⓘTags: Information Theory Migrations | IOI 2025 (Day 2) | Interactive | 1 |
| festival | N/A | ⓘTags: Dynamic Programming, Greedy Festival | IOI 2025 (Day 2) | Interactive | 5 |
| worldmap | N/A | ⓘTags: Constructive Algorithms, Graph Theory World Map | IOI 2025 (Day 1) | Interactive | 6 |
| souvenirs_ioi25 | N/A | ⓘTags: Information Theory Souvenirs | IOI 2025 (Day 1) | Interactive | 10 |
| aoi_umbrella | N/A | ⓘTags: Graph Theory Umbrella | AOI 2025 Day 1 (shoryu386) | Batch | 22 |
| panicbutton | N/A | ⓘTags: Adhoc, Syntax Panic Button | AOI 2025 Day 1 (shoryu386) | Batch | 28 |
| aoi_fft | N/A | ⓘTags: Data Structures, Syntax Fungus Fumbling Time | AOI 2025 Day 1 (shoryu386) | Batch | 49 |
| rhythmscore | N/A | ⓘTags: Syntax rhythmscore | AOI 2025 Day 1 (shoryu386) | Batch | 61 |
| sparsetable | N/A | ⓘTags: Data Structures sparsetable | Classic Problem | Batch | 18 |
| isitpriming | N/A | ⓘTags: Math, Syntax isitpriming | Ngee Ann Secondary At Home Training 1 (NoynYT) | Batch | 23 |
| relay | N/A | ⓘTags: Greedy Relay | JOIGSC 2021/2022 | Batch | 7 |
| gllit | N/A | ⓘTags: Joke gllit | ILLIT | Batch | 8 |
| scicom | N/A | ⓘTags: Syntax scicom | CPIC 2025 Final Contest (PlayVoltz) | Batch | 387 |
| eatingparallelograms | N/A | ⓘTags: Greedy eatingparallelograms | CPIC 2025 Final Contest (shoryu386) | Batch | 155 |
| binarysearch | N/A | ⓘTags: Binary Search binarysearch | CPIC Day 4 tutorial | Batch | 156 |
| priorityqueue | N/A | ⓘTags: Data Structures priorityqueue | CPIC 2025 Practice Contest 3: Intermediate Data Structures, Greedy | Batch | 232 |
| atomsplit | N/A | ⓘTags: Data Structures, Greedy atomsplit | CPIC 2025 Practice Contest 3: Intermediate Data Structures, Greedy (popperoni, beepbeepsheep, blackscreen1) | Batch | 186 |
| rollercoaster | N/A | ⓘTags: Data Structures rollercoaster | CPIC 2025 Final Contest (shoryu386) | Batch | 106 |
| pythonlist | N/A | ⓘTags: Data Structures pythonlist | CPIC 2025 (Advanced) Practice Contest 2: Basic Data Structures, Prefix Sums | Batch | 234 |
| hallucinations | N/A | ⓘTags: Data Structures hallucinations | CPIC 2025 (Advanced) Practice Contest 2: Basic Data Structures, Prefix Sums | Batch | 103 |
| reverse | N/A | ⓘTags: Syntax reverse | CPIC 2025 (Intermediate) Practice Contest 2 (PlayVoltz, Hijackedsoul) | Batch | 325 |
| gota | N/A | ⓘTags: Syntax gota | CPIC 2025 (Intermediate) Practice Contest 2 (PlayVoltz, Hijackedsoul) | Batch | 143 |
| div3 | N/A | ⓘTags: Syntax div3 | CPIC 2025 (Intermediate) Practice Contest 2 (PlayVoltz, Hijackedsoul) | Batch | 125 |
| aratherinterestingtube | N/A | ⓘTags: Data Structures, Syntax Interesting Tube | CPIC 2025 Lecture 2 (nguyendinhanh1508) | Batch | 55 |
| idetestevennumbers | N/A | ⓘTags: Data Structures, Syntax idetestevennumbers | CPIC 2025 Lecture 2 (nguyendinhanh1508) | Batch | 78 |
| mergevectors | N/A | ⓘTags: Data Structures, Syntax mergevectors | CPIC 2025 Lecture 2 (nguyendinhanh1508) | Batch | 69 |
| procrastination | N/A | ⓘTags: Data Structures Procrastination | CPIC 2025 (Advanced) Practice Contest 2: Basic Data Structures, Prefix Sums (Huoi) | Batch | 58 |
| duckhunt14 | N/A | Duck Hunt 14 | Prepared for nonexistent CPIC contest | Batch | 32 |
| skips | N/A | ⓘTags: Syntax skips | CPIC Day 1 tutorial (FIips) | Batch | 59 |
| mirrors | N/A | ⓘTags: Adhoc, Binary Search, Brute Force, Line Sweep/Sliding Window mirrors | CPIC 2025 Final Contest (newperson) | Batch | 54 |
| ranges | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window ranges | CPIC 2025 Final Contest (PlayVoltz) | Batch | 34 |
| drama | N/A | ⓘTags: Binary Search drama | folklore | Batch | 65 |
| twicetwice | N/A | ⓘTags: Line Sweep/Sliding Window twicetwice | folklore | Batch | 20 |
| duckhunt13 | N/A | ⓘTags: Data Structures Duck Hunt 13 | CPIC 2025 (Advanced) Practice Contest 2: Basic Data Structures, Prefix Sums | Batch | 120 |
| sumstack | N/A | ⓘTags: Data Structures sumstack | Classic Problem (Kiameimon) | Batch | 71 |
| twice | N/A | ⓘTags: Binary Search twice | folklore | Batch | 14 |
| basketball_cpic | N/A | ⓘTags: Syntax basketball_cpic | CPIC 2025 Final Contest (JustKitkat) | Batch | 317 |
| dayum | N/A | ⓘTags: Syntax dayum | CPIC 2025 Final Contest (zaneyu) | Batch | 384 |
| visitor2 | N/A | ⓘTags: Adhoc visitor2 | Classic Problem (Kiameimon) | Batch | 2 |
| ntuc | N/A | ⓘTags: Greedy ntuc | CPIC 2025 Practice Contest 3: Intermediate Data Structures, Greedy (Reverberate) | Batch | 86 |
| uniquenumbers_easy | N/A | ⓘTags: Syntax Unique Numbers (Easy Version) | Classic Problem | Batch | 168 |
| wrongreverse | N/A | ⓘTags: Adhoc, Syntax wrongreverse | CPIC 2025 Final Contest (bribritt) | Batch | 203 |
| round_up_division | N/A | ⓘTags: Math, Syntax round_up_division | CPIC 2025 Practice Contest 1: C++ Programming and Syntax (FIips) | Batch | 415 |
| do_you_like_me | N/A | ⓘTags: Syntax do_you_like_me | CPIC 2025 Practice Contest 1: C++ Programming and Syntax | Batch | 421 |
| taskmanaging | N/A | ⓘTags: Data Structures taskmanaging | CPIC (blackscreen1, popperoni) | Batch | 50 |
| swapbuildings | N/A | ⓘTags: Brute Force, Syntax swapbuildings | CPIC Backup (popperoni) | Batch | 50 |
| leftout | N/A | ⓘTags: Syntax leftout | CPIC 2025 (Intermediate) Practice Contest 2 (popperoni) | Batch | 77 |
| platonic3 | N/A | ⓘTags: Syntax Platonic Performance | CPIC 2025 (Intermediate) Practice Contest 3 (popperoni) | Batch | 149 |
| platonic5 | N/A | ⓘTags: Greedy, Syntax Platonic Day Out | CPIC 2025 (Intermediate) Practice Contest 3 (popperoni) | Batch | 129 |
| spreadsheet | N/A | ⓘTags: Adhoc, Syntax spreadsheet | CPIC 2025 Practice Contest 3: Intermediate Data Structures, Greedy (duck) | Batch | 91 |
| platonic4 | N/A | ⓘTags: Syntax Platonic Prayers | CPIC 2025 (Intermediate) Practice Contest 3 (popperoni) | Batch | 137 |
| platonic2 | N/A | ⓘTags: Syntax Platonic Presents | CPIC 2025 (Intermediate) Practice Contest 3 (popperoni) | Batch | 161 |
| platonic | N/A | ⓘTags: Syntax Platonic Gifts | CPIC 2025 (Intermediate) Practice Contest 3 (popperoni) | Batch | 197 |
| lookback | N/A | ⓘTags: Adhoc, Brute Force, Data Structures lookback | CPIC Backup (blackscreen1, popperoni) | Batch | 27 |
| wv | N/A | ⓘTags: Adhoc, Syntax wv | ABC | Batch | 96 |
| parallelogramisation2 | N/A | ⓘTags: Syntax Parallelogramisation 2 | CPIC 2025 Practice Contest 1: C++ Programming and Syntax (FIips) | Batch | 123 |
| rainbowpath | N/A | ⓘTags: Data Structures, Dynamic Programming, Trees rainbowpath | GrifflesCTF (ported to CBR) (shoryu386) | Batch | 4 |
| duckhunt12 | N/A | ⓘTags: Syntax Duck Hunt 12 | CPIC 2025 Practice Contest 1: C++ Programming and Syntax (FIips) | Batch | 77 |
| childsetter4 | N/A | ⓘTags: Syntax Child Problemsetter 4 | CPIC 2025 Practice Contest 1: C++ Programming and Syntax (FIips) | Batch | 292 |
| duckhunt11 | N/A | ⓘTags: Syntax Duck Hunt 11 | Classic Problem (bribritt) | Batch | 12 |
| ducks | N/A | ⓘTags: Data Structures Ducks | SEATST 2025 (Day 2) | Interactive | 5 |
| mvst | N/A | ⓘTags: Graph Theory, Trees mvst | SEATST 2025 (Day 1) | Interactive | 2 |
| subperm | N/A | Subpermutations | SEATST 2025 (Day 1) | Interactive | 15 |
| enwisen | N/A | ⓘTags: Information Theory enwisen | SEATST 2025 (Day 1) | Interactive | 10 |
| buyingapples | N/A | ⓘTags: Greedy Buying Apples | Classic Problem (oolimry) | Batch | 11 |
| rotate | N/A | rotate | APIO 2025 | Interactive | 12 |
| permgame | N/A | ⓘTags: Information Theory permgame | APIO 2025 (errorgorn, tqbfjotld) | Interactive | 3 |
| hack | N/A | hack | APIO 2025 | Interactive | 5 |
| powerfulmaxsum | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window Powerful Maxsum | HCIRS mini contest 2025 (TheRaptor) | Batch | 14 |
| oneforone | N/A | ⓘTags: Greedy One for one | HCIRS mini contest 2025 (TheRaptor) | Batch | 44 |
| progressive | N/A | ⓘTags: Greedy progressive | HCIRS mini contest 2025 (blackscreen1) | Batch | 14 |
| factorymachines | N/A | factorymachines | CSES | Batch | 56 |
| whaleaura | N/A | ⓘTags: Syntax whaleaura | CF 2000 D | Batch | 14 |
| whaleroles | N/A | ⓘTags: Data Structures whaleroles | CF 1714 B | Batch | 25 |
| whalemewing | N/A | ⓘTags: Syntax whalemewing | CF problemset 2 A | Batch | 11 |
| whalegroups | N/A | ⓘTags: Syntax whalegroups | CF 1352 A | Batch | 37 |
| message_ex | N/A | ⓘTags: Information Theory Message (buffed) | IOI 2024 (buffed) | Communication | 1 |
| tour2 | N/A | ⓘTags: Graph Theory Tour | BOI 2025 (Day 1) | Batch | 1 |
| cappuccinoassassino | N/A | ⓘTags: Adhoc, Syntax cappuccinoassassino | HCI 2025 EC³ Beginner Contest | Batch | 60 |
| bombardirocrocodilo | N/A | ⓘTags: Syntax bombardirocrocodilo | HCI 2025 EC³ Beginner Contest (AlphanumericUsername) | Batch | 128 |
| tungtungtungtungtungsahur | N/A | ⓘTags: Binary Search, Data Structures tungtungtungtungtungsahur | HCI 2025 EC³ Beginner Contest (Dolphy) | Batch | 19 |
| tralalerolarila | N/A | ⓘTags: Syntax tralalerolarila | HCI 2025 EC³ Beginner Contest (bz) | Batch | 75 |
| trippitroppi | N/A | ⓘTags: Binary Search, Greedy, Math trippitroppi | HCI 2025 EC³ Beginner Contest (Tyx2019) | Batch | 11 |
| exponents | N/A | ⓘTags: Data Structures exponents | BOI 2025 (Day 2) | Batch | 3 |
| gingerbread | N/A | ⓘTags: Adhoc, Brute Force gingerbread | BOI 2025 (Day 2) | Batch | 7 |
| developer | N/A | ⓘTags: Dynamic Programming, Greedy developer | BOI 2025 (Day 2) | Batch | 6 |
| tower | N/A | ⓘTags: Information Theory tower | BOI 2025 (Day 1) | Interactive | 1 |
| oddqueries | N/A | ⓘTags: Adhoc oddqueries | Codeforces 1807D | Batch | 39 |
| boxes4 | N/A | ⓘTags: Adhoc boxes4 | Batch | 20 | |
| division | N/A | ⓘTags: Syntax division | Batch | 83 | |
| boiacronym | N/A | ⓘTags: Adhoc boiacronym | BOI 2025 (Day 1) | Batch | 4 |
| tst | N/A | ⓘTags: Constructive Algorithms Team Selection Test | SEATST 2025 (Day 2) | Batch | 2 |
| perm2 | N/A | ⓘTags: Graph Theory, Information Theory Encoding a Permutation | SEATST 2025 (Day 2) | Communication | 4 |
| mathematics | N/A | ⓘTags: Joke, Math mathematics | April Fools 2025 (Shadow1) | Batch | 7 |
| eatingkids | N/A | ⓘTags: Joke, Syntax Eating Kids | April Fools 2025 (Tyx2019, bribritt) | Batch | 19 |
| sort2 | N/A | ⓘTags: Joke sort2 | April Fools 2025 (popperoni) | Batch | 15 |
| attackofthelitlosers | N/A | ⓘTags: Joke attackofthelitlosers | April Fools 2025 (ervinthedamsel, ryangohca) | Interactive | 10 |
| plasticsimps | N/A | ⓘTags: Joke plasticsimps | April Fools 2025 (thatlycheeoolongdrink, ryangohca) | Batch | 11 |
| reachability3 | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Have Fun!!! | April Fools 2025 (bribritt) | Batch | 3 |
| monsters2 | N/A | ⓘTags: Data Structures, Greedy monsters2 | NOI 2025 Finals (penguin133) | Batch | 168 |
| thumper2 | N/A | ⓘTags: Adhoc thumper2 | NOI 2025 Finals (bensonlzl) | Batch | 91 |
| reachability2 | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees reachability2 | NOI 2025 Finals (beepbeepsheep) | Batch | 43 |
| robots2 | N/A | ⓘTags: Adhoc, Greedy robots2 | NOI 2025 Finals (pavement) | Batch | 35 |
| flooding2 | N/A | ⓘTags: Adhoc, Graph Theory flooding2 | NOI 2025 Finals (pavement) | Batch | 10 |
| numberspeak | N/A | ⓘTags: Syntax numberspeak | Dunjudge Archive | Batch | 18 |
| drunkpalindrome | N/A | ⓘTags: Adhoc drunkpalindrome | Dunjudge Archive | Batch | 6 |
| rabbitjoke | N/A | ⓘTags: Joke rabbitjoke | April Fools 2025 (bensonlzl) | Batch | 59 |
| onlineexam2 | N/A | ⓘTags: Divide and Conquer, Information Theory onlineexam2 | Classic Problem | Interactive | 3 |
| parallelogramimitation | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke, Syntax Parallelogram Imitation | April Fools 2025 (ryangohca, childsetter) | Batch | 5 |
| sheepishprogrammer | N/A | ⓘTags: Joke Sheepish Programmer | April Fools 2025 (ecxx, ryangohca) | Batch | 0 |
| mao2 | N/A | ⓘTags: Joke Mao 2 | April Fools 2025 (ryangohca) | Batch | 6 |
| exponentiate_easy | N/A | ⓘTags: Brute Force exponentiate_easy | Classic Problem | Batch | 99 |
| trainorbus | N/A | ⓘTags: Syntax Train Or Bus | NOI 2025 Qualification Contest (yanhao) | Batch | 443 |
| duckbuttons | N/A | ⓘTags: Adhoc Duck And Buttons | NOI 2025 Qualification Contest (shoryu386) | Batch | 347 |
| snacks | N/A | ⓘTags: Data Structures Snacks | NOI 2025 Qualification Contest (shoryu386) | Batch | 242 |
| itinerary | N/A | ⓘTags: Adhoc, Graph Theory, Trees Itinerary | NOI 2025 Qualification Contest (cstuart) | Batch | 69 |
| lasers2 | N/A | ⓘTags: Data Structures, Dynamic Programming Lasers 2 | NOI 2025 Qualification Contest (pavement) | Batch | 18 |
| semiexpress | N/A | ⓘTags: Greedy, Math Semiexpress | JOI 2016/2017 Final Round | Batch | 8 |
| matheletes | N/A | ⓘTags: Adhoc matheletes | Codeforces 998 Div 3 | Batch | 54 |
| yogurt | N/A | ⓘTags: Greedy, Syntax yogurt | Codeforces 938 Div 3 | Batch | 154 |
| diamond_usaco | N/A | ⓘTags: Line Sweep/Sliding Window Diamond Collector | 2016 USACO US Open Silver | Batch | 20 |
| exhibition2 | N/A | ⓘTags: Brute Force, Greedy exhibition2 | JOI 2017/2018 Final Round | Batch | 20 |
| soos2 | N/A | ⓘTags: Bitmask, Math soos2 | Valentines Day Contest 2025 (hmm) | Batch | 5 |
| openingshop0 | N/A | ⓘTags: Adhoc, Brute Force Opening Shop | Classic Problem (oolimry) | Batch | 65 |
| hehehoho | N/A | ⓘTags: Adhoc, Greedy hehehoho | Valentines Day Contest 2025 (zaneyu) | Batch | 3 |
| maintainsum | N/A | ⓘTags: Adhoc Maintain Sum | Classic Problem (oolimry) | Batch | 89 |
| mosaic2 | N/A | ⓘTags: Bitmask, Square Root Decomposition Mosaic 2 | Valentines Day Contest 2025 (bribritt) | Interactive | 2 |
| duckhunt10 | N/A | ⓘTags: Graph Theory, Slope Trick, Trees Duck Hunt 10 | Codechef | Batch | 3 |
| nytrainer_hard | N/A | ⓘTags: Binary Search, Brute Force, Dynamic Programming Nanyang Trainer (Hard) | NYOI 2024 Practice Session (buffed) (oolimry, Pan) | Batch | 5 |
| impossiblegame | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke The Impossible Game | Hello 2025 (ryangohca) | Interactive | 16 |
| duckhunt9 | N/A | ⓘTags: Data Structures, Greedy Duck Hunt 9 | ( ͡° ͜ʖ ͡°) (errorgorn) | Batch | 10 |
| physics | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke physics | Hello 2025 | Batch | 25 |
| economics | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke Economics | Hello 2025 (ryangohca) | Batch | 18 |
| slidefk | N/A | ⓘTags: Constructive Algorithms, Joke slidefk | Hello 2025 (blackscreen1) | Batch | 16 |
| shiritori_ex | N/A | ⓘTags: Constructive Algorithms shiritori_ex | Hello 2025 (shoryu386) | Batch | 21 |
| transmit | N/A | ⓘTags: Adhoc, Information Theory transmit | Dec Course 2024 Elementary Final Contest (JerryCodebreaker) | Batch | 36 |
| videogames | N/A | ⓘTags: Data Structures videogames | Dec Course 2024 Advanced Final Contest (ansel) | Batch | 56 |
| expansion | N/A | ⓘTags: Dynamic Programming expansion | Dec Course 2024 Elementary Final Contest (eulerleonhardfan) | Batch | 13 |
| duckhunt0 | N/A | ⓘTags: Adhoc, Binary Search, Bitmask, Brute Force, Constructive Algorithms, Data Structures, Divide and Conquer, Dynamic Programming, Graph Theory, Greedy, Information Theory, Joke, Math, Meet in the Middle, Slope Trick, Square Root Decomposition, Syntax, Trees Duck Hunt 0 | Hello 2025 (errorgorn, ryangohca) | Interactive | 1 |
| funnyhat | N/A | ⓘTags: Data Structures, Divide and Conquer, Graph Theory, Information Theory, Trees funnyhat | Dec Course 2024 Advanced Final Contest (TheRaptor) | Interactive | 14 |
| summarising2024 | N/A | ⓘTags: Joke Summarising 2024 | Hello 2025 (ryangohca) | Communication | 22 |
| shiritori | N/A | ⓘTags: Syntax shiritori | Dec Course 2024 Elementary Final Contest (shoryu386) | Batch | 136 |
| iroha | N/A | ⓘTags: Graph Theory, Greedy iroha | ILLIT (Shadow1, ryangohca) | Batch | 62 |
| moka | N/A | ⓘTags: Graph Theory, Syntax moka | ILLIT (shoryu386) | Batch | 63 |
| minju | N/A | ⓘTags: Graph Theory minju | ILLIT (Codeforces 1873H) | Batch | 14 |
| yunah | N/A | ⓘTags: Graph Theory, Syntax yunah | ILLIT (ryangohca) | Batch | 55 |
| duckhunt8 | N/A | ⓘTags: Adhoc, Data Structures, Greedy Duck Hunt 8 | Dec Course 2024 Advanced Final Contest (Tyx2019) | Batch | 22 |
| wonhee | N/A | ⓘTags: Graph Theory wonhee | ILLIT (USACO 2024 Silver) | Batch | 14 |
| robotbombs | N/A | ⓘTags: Greedy Robot + Bombs | Dec Course 2024 Advanced Final Contest (oolimry) | Batch | 142 |
| zanesescape | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming, Graph Theory, Trees Zane's Escape | KOITST 2023 | Interactive | 6 |
| sana | N/A | ⓘTags: Adhoc, Constructive Algorithms, Graph Theory, Trees Sana Minatozaki | Dec Course 2024 Advanced Final Contest (zaneyu) | Batch | 52 |
| zanespresents | N/A | ⓘTags: Data Structures, Dynamic Programming Zane's Presents | Kattis | Batch | 24 |
| holiday | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming holiday | IOI 2014 | Interactive | 8 |
| shamelessad5_ex | N/A | ⓘTags: Data Structures, Dynamic Programming shamelessad5_ex | Classic Problem (ryangohca) | Batch | 21 |
| shamelessad5 | N/A | ⓘTags: Dynamic Programming shamelessad5 | Classic Problem (ryangohca) | Batch | 61 |
| discord | N/A | ⓘTags: Dynamic Programming Harmony from Discord | ABC 245C | Batch | 44 |
| duckhunt7 | N/A | ⓘTags: Dynamic Programming Duck Hunt 7 | Batch | 28 | |
| duckhunt6 | N/A | ⓘTags: Adhoc, Graph Theory, Trees Duck Hunt 6 | Codeforces 685B | Batch | 18 |
| lostones | N/A | ⓘTags: Data Structures, Greedy Lost One's Weeping | Atcoder Code Thanks 2017 C | Batch | 56 |
| brainrot | N/A | ⓘTags: Divide and Conquer, Graph Theory, Trees brainrot | KOITST 2024 | Batch | 10 |
| duckhunt5 | N/A | ⓘTags: Data Structures Duck Hunt 5 | Classic Problem (penguin133) | Batch | 173 |
| skibuddy | N/A | ⓘTags: Data Structures, Graph Theory, Trees skibuddy | COMPFEST 13 - Finals | Batch | 23 |
| childsetter3 | N/A | ⓘTags: Line Sweep/Sliding Window Child Problemsetter 3 | Classic Problem | Batch | 17 |
| chaewon | N/A | ⓘTags: Data Structures, Divide and Conquer, Graph Theory, Trees chaewon | Luogu P5559 | Batch | 14 |
| shirts | N/A | ⓘTags: Data Structures Shirts | ABC 380E | Batch | 18 |
| labs | N/A | ⓘTags: Data Structures Labs | Classic Problem (Reverberate) | Batch | 97 |
| giselle | N/A | ⓘTags: Graph Theory, Trees giselle | Codeforces 600E | Batch | 27 |
| winter | N/A | ⓘTags: Graph Theory, Greedy, Trees winter | Codeforces 609E | Batch | 37 |
| ningning | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees ningning | Codeforces 1882D | Batch | 27 |
| karina | N/A | ⓘTags: Graph Theory, Trees karina | JOI Final Contest 2022/2023 P4 | Batch | 21 |
| bingeeating | N/A | ⓘTags: Greedy bingeeating | Codeforces 1951C | Batch | 49 |
| worldend | N/A | ⓘTags: Dynamic Programming What Do You Do at the End of the World? | ABC 317F | Batch | 10 |
| movingkids | N/A | ⓘTags: Greedy movingkids | Codeforces 1923A | Batch | 69 |
| childvschild | N/A | ⓘTags: Greedy childvschild | Malaysian Computing Challenge 2024 | Batch | 63 |
| duckhunt4 | N/A | ⓘTags: Greedy, Syntax Duck Hunt 4 | ABC 160 | Batch | 218 |
| childsetter2 | N/A | ⓘTags: Greedy childsetter2 | MITIT 2024 Beginner Round | Batch | 80 |
| hackinggate | N/A | ⓘTags: Bitmask, Dynamic Programming Hacking To The Gate | Codeforces 79D | Batch | 9 |
| giantduck | N/A | ⓘTags: Bitmask, Dynamic Programming Giant Duck | Luogu P4317 | Batch | 19 |
| worldline | N/A | ⓘTags: Dynamic Programming, Graph Theory World Lines | Codeforces 1866C | Batch | 14 |
| duckhunt3 | N/A | ⓘTags: Bitmask, Dynamic Programming Duck Hunt 3 | ABC 142E | Batch | 34 |
| trampoline | N/A | ⓘTags: Graph Theory, Trees Trampoline | info1cup20 | Batch | 12 |
| superduper | N/A | ⓘTags: Binary Search superduper | Codeforces 971E | Batch | 35 |
| commonsubseq | N/A | ⓘTags: Brute Force Common Subsequence | Dec Course 2024 E.Contest 5 (JustKitkat) | Batch | 50 |
| lllontree | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees lllontree | ABC 165 F | Batch | 37 |
| malguem | N/A | ⓘTags: Adhoc, Graph Theory, Information Theory, Trees My Name is Malguem (Sunny) | Codeforces 1930H | Interactive | 5 |
| addictiontoworry | N/A | ⓘTags: Graph Theory, Trees T.B.H (Addiction to Worry) | ABC 070 D | Batch | 78 |
| boxinbox2 | N/A | ⓘTags: Brute Force boxinbox2 | Codeforces 952E | Batch | 34 |
| mindeque | N/A | ⓘTags: Data Structures mindeque | child problemsetter (bribritt) | Batch | 110 |
| childsetter | N/A | ⓘTags: Dynamic Programming Child Problemsetter | MITIT 2024 Advanced Round | Batch | 11 |
| duckhunt2 | N/A | ⓘTags: Binary Search, Constructive Algorithms, Dynamic Programming Duck Hunt 2 | CEOI 2024 | Batch | 16 |
| lemonade2 | N/A | ⓘTags: Dynamic Programming lemonade2 | ABC 375E | Batch | 44 |
| lemonade | N/A | ⓘTags: Dynamic Programming Lemonade Stand | Atcoder Educational DP contest | Batch | 79 |
| duckhunt | N/A | ⓘTags: Dynamic Programming Duck Hunt | ABC 369F | Batch | 64 |
| nomorebp | N/A | ⓘTags: Graph Theory, Trees nomorebp | Codeforces Round 681 E | Batch | 9 |
| richzhe | N/A | ⓘTags: Graph Theory, Trees richzhe | Codeforces Round 769 E | Batch | 12 |
| leenbeetree | N/A | ⓘTags: Graph Theory, Trees leenbeetree | USACO Jan 2024 Silver | Batch | 50 |
| runaway | N/A | ⓘTags: Binary Search runaway | Codeforces 972B2 | Batch | 55 |
| sadtrainer2 | N/A | ⓘTags: Binary Search, Data Structures sadtrainer2 | Classic Problem (JustKitkat) | Batch | 105 |
| snake | N/A | ⓘTags: Data Structures Snake | ABC 335C | Batch | 73 |
| trollingbribritt | N/A | ⓘTags: Data Structures Trolling bribritt | Classic Problem (Kiameimon, bribritt) | Batch | 146 |
| flows | N/A | ⓘTags: Data Structures flows | ABC 359E | Batch | 34 |
| rop | N/A | ⓘTags: Adhoc Republic of Parallelograms | Codeforces 1922C | Batch | 41 |
| fakeidol | N/A | ⓘTags: Adhoc, Data Structures Fake Idol | Olimpiada Informatyczna | Batch | 8 |
| morexiaoyang | N/A | ⓘTags: Binary Search, Data Structures, Line Sweep/Sliding Window I want more Xiaoyangs! | Codeforces 2046C | Batch | 11 |
| gohcart2 | N/A | ⓘTags: Data Structures Goh Cart 2 | ABC 322F | Batch | 16 |
| shamelessad4 | N/A | ⓘTags: Data Structures shamelessad4 | Classic Problem (shoryu386, ryangohca) | Batch | 55 |
| hammeringnails | N/A | ⓘTags: Adhoc Hammering nails | Codeforces 802C | Batch | 35 |
| sumsumdigit | N/A | ⓘTags: Dynamic Programming Sum of Sum of Digits | Codeforces 928C | Batch | 79 |
| ssoca | N/A | ⓘTags: Brute Force Subarray Sum of Cyclic Array | child problemsetter (bribritt) | Batch | 61 |
| visitor | N/A | ⓘTags: Line Sweep/Sliding Window Visitor | Codeforces 974D | Batch | 31 |
| cokemoresugar | N/A | ⓘTags: Data Structures Coke: MORE Sugar | Classic Problem (zyq69) | Batch | 35 |
| differencearray | N/A | ⓘTags: Data Structures Difference Array | Classic Problem | Batch | 149 |
| inversioncounting | N/A | ⓘTags: Adhoc, Syntax inversioncounting | Classic Problem Nerfed (shoryu386) | Batch | 43 |
| sadtrainer | N/A | ⓘTags: Syntax sadtrainer | Classic Problem (shoryu386) | Batch | 210 |
| numberbuilding | N/A | ⓘTags: Greedy numberbuilding | ABC 257E | Batch | 37 |
| finalday | N/A | ⓘTags: Adhoc, Greedy finalday | ABC 228C | Batch | 61 |
| coupons | N/A | ⓘTags: Data Structures, Greedy Coupons | China IOI 2023 Team Selection Homework | Batch | 6 |
| twoarrays | N/A | ⓘTags: Adhoc, Greedy Two Arrays | Codeforces 1898D | Batch | 49 |
| team | N/A | ⓘTags: Greedy Team Contest | JOI 2021/2022 Spring Camp | Batch | 22 |
| waterbottles3 | N/A | ⓘTags: Adhoc waterbottles3 | Classic Problem? (shoryu386) | Batch | 67 |
| mathmadness | N/A | ⓘTags: Dynamic Programming, Greedy Math Madness | ABC 366F | Batch | 50 |
| problemsetter2 | N/A | ⓘTags: Greedy Problem Setter 2 | NOI Finals 2024 (modified) (beepbeepsheep) | Batch | 44 |
| shamelessad3 | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window shamelessad3 | Classic Problem | Batch | 92 |
| diversesegments | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window diversesegments | Codeforces 1684F | Batch | 12 |
| raptorinc | N/A | ⓘTags: Syntax raptorinc | Classic Problem (Tyx2019, Kiameimon) | Batch | 156 |
| twochoices | N/A | ⓘTags: Adhoc allareequal | ARC 115A | Batch | 73 |
| wronganswer | N/A | ⓘTags: Syntax wronganswer | ABC 343A | Batch | 196 |
| duckeatant | N/A | ⓘTags: Data Structures Duck Eat Ant | Codeforces 474F | Batch | 49 |
| applebaskets | N/A | ⓘTags: Binary Search Apple Baskets on Circle | ABC 270E | Batch | 74 |
| rangerangequery | N/A | ⓘTags: Data Structures rangerangequery | Classic Problem (shoryu386) | Batch | 91 |
| sphinx | N/A | ⓘTags: Graph Theory, Information Theory Sphinx's Riddle | IOI 2024 (Day 2) | Interactive | 5 |
| mosaic | N/A | ⓘTags: Adhoc Mosaic | IOI 2024 (Day 2) | Interactive | 8 |
| multipleswith8 | N/A | ⓘTags: Meet in the Middle, Square Root Decomposition Multiples with 8 | child problemsetter (bribritt) | Batch | 27 |
| permutationgrid | N/A | ⓘTags: Syntax permutationgrid | Classic Problem (blackscreen1) | Batch | 61 |
| hieroglyphs_ioi24 | N/A | ⓘTags: Adhoc, Data Structures Hieroglyphs | IOI 2024 (Day 2) | Interactive | 3 |
| tree_ioi24 | N/A | ⓘTags: Graph Theory, Greedy, Trees Tree | IOI 2024 (Day 1) | Interactive | 5 |
| message | N/A | ⓘTags: Information Theory Message | IOI 2024 (Day 1) | Communication | 10 |
| nile | N/A | ⓘTags: Data Structures Nile | IOI 2024 (Day 1) | Interactive | 14 |
| sorting2 | N/A | ⓘTags: Syntax Sorting | NOI Practice Tasks | Interactive | 27 |
| sum | N/A | ⓘTags: Syntax Sum | NOI Practice Tasks | Batch | 51 |
| hello | N/A | ⓘTags: Syntax Hello | NOI Practice Tasks | Batch | 389 |
| whiteboardgame | N/A | ⓘTags: Adhoc, Data Structures whiteboardgame | Dec Course 2024 Selection Test (Kiameimon) | Batch | 108 |
| waterbomb | N/A | ⓘTags: Adhoc, Greedy Waterbomb | Dec Course 2024 Selection Test (zaneyu) | Batch | 186 |
| warp2 | N/A | ⓘTags: Graph Theory warp2 | HCI November Final Contest 2024 (TheRaptor) | Batch | 22 |
| eight | N/A | ⓘTags: Syntax eight | Dec Course 2024 Selection Test (Tyx2019) | Batch | 492 |
| tourism | N/A | ⓘTags: Syntax tourism | HCI November Final Contest 2024 (Tyx2019) | Batch | 47 |
| mrt2 | N/A | ⓘTags: Graph Theory mrt2 | Dec Course 2024 Selection Test (siewjh) | Batch | 56 |
| shoop | N/A | ⓘTags: Binary Search, Greedy shoop | Dec Course 2024 Selection Test (penguin133) | Batch | 55 |
| lonelybeavers | N/A | ⓘTags: Dynamic Programming lonelybeavers | JOIG 2024 | Batch | 28 |
| shamelessad2 | N/A | ⓘTags: Syntax shamelessad2 | HCI November Final Contest 2024 (penguin133) | Batch | 138 |
| cinema | N/A | ⓘTags: Data Structures Cinema | HCI November Final Contest 2024 (penguin133) | Batch | 42 |
| deliveringpotatoes | N/A | ⓘTags: Data Structures deliveringpotatoes | ABC 334F | Batch | 7 |
| transportingpotatoes | N/A | ⓘTags: Dynamic Programming, Graph Theory Transporting Potatoes | RI November Course 2024 Advanced Final Contest (user123, bribritt) | Batch | 8 |
| log | N/A | ⓘTags: Binary Search Replanting Potatoes | ARC 109B | Batch | 13 |
| sellingpotatoes | N/A | ⓘTags: Adhoc Selling Potatoes | RI November Course 2024 Elementary Final Contest | Batch | 31 |
| funnysequence | N/A | ⓘTags: Binary Search Potato Sequence | RI November Course 2024 Final Contest (bribritt) | Interactive | 14 |
| plantingpotatoes2 | N/A | ⓘTags: Math, Syntax plantingpotatoes2 | RI November Course 2024 Elementary Final Contest | Batch | 42 |
| robotrotation | N/A | ⓘTags: Brute Force, Meet in the Middle Robot Rotation | ABC 326F | Batch | 11 |
| mergesets | N/A | ⓘTags: Data Structures Merge Sets | ABC 306F | Batch | 3 |
| boxinbox | N/A | ⓘTags: Data Structures Box in Box | ABC 309 | Batch | 28 |
| numberspiral | N/A | ⓘTags: Syntax Number Spiral | CSES | Batch | 48 |
| commonsubsequence | N/A | ⓘTags: Dynamic Programming commonsubsequence | ABC 130 | Batch | 5 |
| indextimesa | N/A | ⓘTags: Dynamic Programming Index x A | ABC 267 | Batch | 13 |
| potatosqueues | N/A | ⓘTags: Data Structures, Greedy potatosqueues | Classic Problem (Potato3218) | Batch | 32 |
| ihatenonint | N/A | ⓘTags: Dynamic Programming I Hate Non-integer Number | ABC 262 | Batch | 7 |
| between2arrays | N/A | ⓘTags: Dynamic Programming Between Two Arrays | ABC 222 | Batch | 7 |
| 1111galpassword | N/A | ⓘTags: Dynamic Programming Good Potatoes | ABC 242 | Batch | 22 |
| choosingcandies | N/A | ⓘTags: Brute Force Choosing Candies | Classic Problem | Batch | 78 |
| sudoku2 | N/A | ⓘTags: Syntax sudoku2 | ABC 327C | Batch | 27 |
| skiing | N/A | ⓘTags: Graph Theory skiing | ABC 237 | Batch | 7 |
| colourfulpaths | N/A | ⓘTags: Dynamic Programming, Graph Theory colourfulpaths | ABC 335 | Batch | 8 |
| choose2eat1 | N/A | ⓘTags: Graph Theory, Trees choose2eat1 | ABC 282 | Batch | 17 |
| simplemath2 | N/A | ⓘTags: Math simplemath2 | ARC 111 | Batch | 21 |
| oddoneout | N/A | ⓘTags: Syntax oddoneout | ABC 342A | Batch | 81 |
| whoatethefries | N/A | ⓘTags: Syntax whoatethefries | ABC 355A | Batch | 87 |
| seats2 | N/A | ⓘTags: Syntax Seats | ABC 375A | Batch | 75 |
| jewels | N/A | ⓘTags: Line Sweep/Sliding Window Nanyang Jewels | NYOI 2024 Final Round (Shadow1) | Batch | 47 |
| robotonring3 | N/A | ⓘTags: Dynamic Programming Robot on Ring 3 | Classic Problem (oolimry) | Batch | 17 |
| robotonring2 | N/A | ⓘTags: Brute Force, Syntax Robot on Ring 2 | Classic Problem (oolimry) | Batch | 23 |
| robotonring1 | N/A | ⓘTags: Brute Force, Syntax Robot on Ring 1 | Classic Problem (oolimry) | Batch | 65 |
| givinggifts | N/A | ⓘTags: Syntax Giving Gifts | Classic Problem (oolimry) | Batch | 45 |
| sumofdigits | N/A | ⓘTags: Syntax Sum of Digits | Classic Problem | Batch | 140 |
| shamelessad | N/A | ⓘTags: Syntax Shameless Advertisement | Shor's SG Collection Original (0 Star) (shoryu386) | Batch | 441 |
| yaleuniversity | N/A | ⓘTags: Data Structures yaleuniversity | RI November Course 2024 Diagnostic Test (Potato3218, RandomPerson) | Batch | 75 |
| nycoordinates | N/A | ⓘTags: Brute Force nycoordinates | NYOI 2024 Practice Round (JustKitkat, Pan) | Batch | 84 |
| parade_nyoi | N/A | ⓘTags: Adhoc parade_nyoi | NYOI 2024 Practice Round (Shadow1) | Batch | 24 |
| veryeasymath | N/A | ⓘTags: Syntax veryeasymath | RI November Course 2024 Diagnostic Test (Potato3218, RandomPerson) | Batch | 59 |
| wikipedia | N/A | ⓘTags: Graph Theory Wikipedia Articles | RI November Course 2024 Diagnostic Test (wangy412, Potato3218) | Batch | 14 |
| gotosleep | N/A | ⓘTags: Dynamic Programming gotosleep | RI November Course 2024 Diagnostic Test (Potato3218) | Batch | 66 |
| hacked | N/A | ⓘTags: Math, Syntax hacked | RI November Course 2024 Diagnostic Test (Potato3218) | Batch | 26 |
| sufferingprogrammer | N/A | ⓘTags: Joke Suffering Programmer | Suffering (shoryu386) | Batch | 10 |
| thedarknight | N/A | ⓘTags: Math, Syntax thedarknight | NASS CP Club Training Contest 1 (Batigol) | Batch | 54 |
| coinmaster | N/A | ⓘTags: Explicitly Excluded (from IOI), Graph Theory coinmaster | :) (PlayVoltz) | Batch | 5 |
| primeage | N/A | ⓘTags: Math, Syntax primeage | NASS CP Club Training Contest 1 (Batigol) | Batch | 64 |
| photo_nyoi | N/A | ⓘTags: Greedy Nanyang Phototaking | NYOI 2024 Practice Round (Pan) | Batch | 12 |
| examstress2_ex | N/A | ⓘTags: Joke examstress2_ex | Exam Stress (JustKitkat) | Batch | 7 |
| examstress2 | N/A | ⓘTags: Joke Exam Stress 2 | Exam Stress (JustKitkat) | Batch | 12 |
| bftrouble | N/A | ⓘTags: Syntax bftrouble | SG IO Course Final Contest (zaneyu) | Batch | 108 |
| robberduck | N/A | ⓘTags: Binary Search, Line Sweep/Sliding Window robberduck | VS mini contest (penguin133) | Batch | 9 |
| parallelogrampairs | N/A | ⓘTags: Binary Search, Greedy parallelogrampairs | VS mini contest (Kiameimon) | Batch | 14 |
| peepeepoopoo | N/A | ⓘTags: Syntax peepeepoopoo | SG IO Course Final Contest (zaneyu) | Batch | 321 |
| abcs | N/A | ⓘTags: Adhoc abcs | SG IO Course Final Contest | Batch | 36 |
| nerdinvitation | N/A | ⓘTags: Syntax nerdinvitation | NAOI 2024 (spambot696969) | Batch | 51 |
| chokolit | N/A | ⓘTags: Line Sweep/Sliding Window chokolit | NAOI 2024 (spambot696969) | Batch | 30 |
| catsort | N/A | ⓘTags: Greedy catsort | NAOI 2024 (PlayVoltz) | Batch | 26 |
| assistance | N/A | ⓘTags: Syntax assistance | NAOI 2024 (spambot696969) | Batch | 92 |
| loveletter | N/A | ⓘTags: Adhoc, Math loveletter | NAOI 2024 (PlayVoltz) | Batch | 6 |
| babyproduction | N/A | ⓘTags: Data Structures babyproduction | SG IO Course Final Contest (zaneyu) | Batch | 29 |
| fsylll | N/A | ⓘTags: Dynamic Programming, Explicitly Excluded (from IOI), Math fsylll | SG IO Course Final Contest (zaneyu) | Batch | 10 |
| goofyarray | N/A | ⓘTags: Greedy goofyarray | SG IO Course Final Contest (zaneyu) | Batch | 65 |
| findmultiple | N/A | ⓘTags: Math, Syntax findmultiple | ABC 220A | Batch | 75 |
| nystudy | N/A | ⓘTags: Data Structures Nanyang Study | NYOI 2024 Final Round (JustKitkat) | Batch | 80 |
| nycheer | N/A | ⓘTags: Syntax Nanyang Cheer! | NYOI 2024 Practice Round (Pan) | Batch | 212 |
| nypromo | N/A | ⓘTags: Data Structures, Divide and Conquer, Greedy, Line Sweep/Sliding Window Nanyang Promotional Examination | NYOI 2024 Final Round (Pan, Hijackedsoul) | Batch | 8 |
| ny_unwind | N/A | ⓘTags: Syntax Nanyang Unwind Time | NYOI 2024 Final Round (Shadow1) | Batch | 287 |
| nylunchtime | N/A | ⓘTags: Syntax Nanyang Lunch Time | NYOI 2024 Practice Round (JustKitkat) | Batch | 232 |
| glottalstops | N/A | ⓘTags: Syntax glottalstops | HCI EC³ Beginner Contest 2024 (geometric) | Batch | 90 |
| sortingtrainers2 | N/A | ⓘTags: Binary Search, Greedy sortingtrainers2 | HCI EC³ Beginner Contest 2024 (blackscreen1, Tyx2019) | Batch | 14 |
| goodchef | N/A | ⓘTags: Data Structures, Greedy goodchef | AOI 2024 Day 2 (shoryu386) | Batch | 63 |
| ny_mathexam | N/A | ⓘTags: Syntax Nanyang Math Exam | NYOI 2024 Practice Round (JustKitkat) | Batch | 318 |
| hungrycats | N/A | ⓘTags: Adhoc, Constructive Algorithms Nanyang Hungry Cats | NYOI 2024 Final Round (JustKitkat) | Batch | 109 |
| waterbottles2 | N/A | ⓘTags: Greedy waterbottles2 | HCI EC³ Beginner Contest 2024 (bz, AlphanumericUsername) | Batch | 29 |
| adventure | N/A | ⓘTags: Adhoc adventure | HCI EC³ Beginner Contest 2024 (bz) | Batch | 41 |
| treasurehunt | N/A | ⓘTags: Data Structures treasurehunt | HCI EC³ Beginner Contest 2024 (bz) | Batch | 17 |
| hotelhunt_easy | N/A | ⓘTags: Graph Theory, Trees Hotel Hunt(Easy) | CPIC (Hijackedsoul, PlayVoltz) | Batch | 4 |
| badtone33 | N/A | ⓘTags: Binary Search, Data Structures, Graph Theory, Math badtone33 | Classic Problem (AlphanumericUsername) | Batch | 30 |
| reversiblecampaign | N/A | ⓘTags: Math, Syntax reversiblecampaign | yixiang derrick and lucas couldn’t solve this lol (AlphanumericUsername) | Batch | 29 |
| typoswap | N/A | ⓘTags: Syntax typoswap | CPIC 2024 Final Contest (PlayVoltz) | Batch | 583 |
| yayornay | N/A | ⓘTags: Syntax Yay or Nay | CPIC 2024 Final Contest (JustKitkat, penguin133) | Batch | 419 |
| factorial | N/A | ⓘTags: Dynamic Programming factorial | Classic Problem | Batch | 96 |
| factorial_easy | N/A | ⓘTags: Brute Force factorial_easy | Classic Problem | Batch | 263 |
| fibo_easy | N/A | ⓘTags: Brute Force fibo_easy | Classic Problem | Batch | 279 |
| hackingscores | N/A | ⓘTags: Greedy Hacking Scores | CPIC 2024 Final Contest (Shadow1) | Batch | 44 |
| hotelhunt_ex | N/A | ⓘTags: Adhoc Hotel Hunt | CPIC 2024 Final Contest (PlayVoltz, Pan) | Batch | 18 |
| laptop | N/A | ⓘTags: Syntax laptop | CPIC 2024 Final Contest (spambot696969) | Batch | 182 |
| queuecutting | N/A | ⓘTags: Data Structures Queue Cutting | CPIC 2024 Final Contest (Pan) | Batch | 51 |
| NYAerion | N/A | ⓘTags: Data Structures, Graph Theory, Trees Nanyang Aerion Adventures | NYOI 2024 Final Round (Pan) | Batch | 19 |
| splittingpower | N/A | ⓘTags: Data Structures, Dynamic Programming, Greedy, Math splittingpower | AOI 2024 Day 2 (shoryu386) | Batch | 21 |
| chimera | N/A | ⓘTags: Binary Search, Line Sweep/Sliding Window chimera | AOI 2024 Day 1 (shoryu386) | Interactive | 17 |
| meltylandnightmare | N/A | ⓘTags: Brute Force, Graph Theory, Greedy meltylandnightmare | AOI 2024 Day 1 (shoryu386) | Batch | 30 |
| ontheedge | N/A | ⓘTags: Adhoc, Greedy ontheedge | AOI 2024 Day 2 (shoryu386) | Batch | 66 |
| feedtheduck | N/A | ⓘTags: Binary Search, Data Structures, Line Sweep/Sliding Window feedtheduck | AOI 2024 Day 1 (shoryu386) | Batch | 111 |
| duckeatduck | N/A | ⓘTags: Math, Syntax duckeatduck | AOI 2024 Day 2 (shoryu386) | Batch | 187 |
| orz | N/A | ⓘTags: Syntax orz | AOI 2024 Day 1 (shoryu386) | Batch | 204 |
| democracy | N/A | ⓘTags: Syntax democracy | CPIC 2024 Final Contest (JustKitkat) | Batch | 229 |
| september | N/A | ⓘTags: Graph Theory, Greedy, Trees September | APIO 2024 | Interactive | 28 |
| train_apio24 | N/A | ⓘTags: Data Structures, Graph Theory Train | APIO 2024 (myrcella) | Interactive | 3 |
| show | N/A | ⓘTags: Graph Theory, Information Theory, Trees Magic Show | APIO 2024 | Communication | 6 |
| bizarrebuffet | N/A | ⓘTags: Adhoc, Dynamic Programming bizarrebuffet | CPIC 2024 Final Contest (PlayVoltz, Hijackedsoul) | Batch | 15 |
| NYSSW_easy | N/A | ⓘTags: Binary Search, Math Nanyang Seashell Wall (Easy) | NYOI 2024 Practice Round (Shadow1) | Batch | 38 |
| arraygraph | N/A | ⓘTags: Joke, Syntax arraygraph | funny (PlayVoltz) | Batch | 20 |
| imagination | N/A | ⓘTags: Joke Imagination | Codebreaker Fundraiser Contest 2024 (oolimry, ryangohca) | Batch | 17 |
| mao | N/A | ⓘTags: Joke Mao | Codebreaker Fundraiser Contest 2024 (ecxx) | Interactive | 0 |
| NYSSW | N/A | ⓘTags: Binary Search, Data Structures Nanyang Seashell Wall (Hard) | NYOI 2024 Practice Round (Shadow1) | Batch | 9 |
| examstress | N/A | ⓘTags: Adhoc Exam Stress | Exam Stress (JustKitkat) | Batch | 29 |
| WA1 | N/A | ⓘTags: Joke WA1 | NYCP Challenge (Pan) | Batch | 29 |
| divideby2 | N/A | ⓘTags: Syntax divideby2 | Classic Problem (zaneyu) | Batch | 200 |
| goodbye | N/A | ⓘTags: Syntax goodbye | Classic Problem (zaneyu) | Batch | 333 |
| compleecode | N/A | ⓘTags: Joke Complee Code | Codebreaker Fundraiser Contest 2024 (oolimry) | Batch | 19 |
| NYSport | N/A | ⓘTags: Math, Syntax Nanyang Sport Carnival | NYOI 2024 Final Round (Shadow1) | Batch | 218 |
| NYCanteen | N/A | ⓘTags: Data Structures, Greedy, Line Sweep/Sliding Window Nanyang Canteen | NYOI 2024 Final Round (Pan) | Batch | 39 |
| NYTrainers | N/A | ⓘTags: Brute Force, Dynamic Programming Nanyang Trainers | NYOI 2024 Practice Round (Pan) | Batch | 15 |
| blank | N/A | ⓘTags: Joke | April Fools 2024 (zengminghao) | Batch | 40 |
| sequences | N/A | ⓘTags: Joke Sequences | April Fools 2024 (siewjh) | Batch | 15 |
| add1_easy | N/A | ⓘTags: Joke Add 1 (Easy) | April Fools 2024 (ryangohca) | Batch | 24 |
| boxes3 | N/A | ⓘTags: Binary Search, Data Structures boxes3 | Random idea (AlphanumericUsername) | Batch | 6 |
| fibble | N/A | ⓘTags: Joke Fibble | April Fools 2024 (ryangohca) | Interactive | 12 |
| trashinteractive | N/A | ⓘTags: Binary Search, Information Theory, Joke Trash Interactive | April Fools 2024 (TheRaptor) | Interactive | 20 |
| addition3 | N/A | ⓘTags: Joke Addition 3 | April Fools 2024 (oolimry) | Batch | 293 |
| field | N/A | ⓘTags: Graph Theory Field | NOI 2024 Finals (cstuart) | Batch | 8 |
| coin | N/A | ⓘTags: Data Structures, Graph Theory Coin | NOI 2024 Finals (yanhao) | Batch | 43 |
| shops | N/A | ⓘTags: Graph Theory, Trees Shops | NOI 2024 Finals (bensonlzl) | Batch | 158 |
| problemsetter | N/A | ⓘTags: Greedy Problem Setter | NOI 2024 Finals (cstuart) | Batch | 262 |
| toxic2 | N/A | ⓘTags: Adhoc, Binary Search, Information Theory Toxic Gene 2 | NOI 2024 Finals (bensonlzl) | Interactive | 12 |
| decrypt | N/A | ⓘTags: Greedy decrypt | HCI (HS) 2024 Contest 1 (Tyx2019, AlphanumericUsername) | Batch | 10 |
| coprimecodependence | N/A | ⓘTags: Brute Force, Math coprimecodependence | HCI (HS) 2024 Contest 1 (AlphanumericUsername) | Batch | 26 |
| defense101 | N/A | ⓘTags: Greedy defense101 | HCI (HS) 2024 Contest 1 (Tyx2019) | Batch | 66 |
| playlist | N/A | ⓘTags: Math, Syntax playlist | HCI (HS) 2024 Contest 1 (pIaceholder) | Batch | 163 |
| binarystring | N/A | ⓘTags: Dynamic Programming Binary String | EOI 2023 Day 1 | Batch | 10 |
| sonictheparallelogram | N/A | ⓘTags: Math, Syntax sonictheparallelogram | HCI (HS) 2024 Contest 1 (Tyx2019) | Batch | 103 |
| cooperation | N/A | ⓘTags: Explicitly Excluded (from IOI), Information Theory, Joke Cooperation | April Fools 2024 (blackscreen1) | Batch | 21 |
| tourist_noi | N/A | ⓘTags: Syntax Tourist | NOI 2024 Qualification Contest (yanhao) | Batch | 679 |
| party_noi | N/A | ⓘTags: Greedy Party | NOI 2024 Qualification Contest (zaneyu) | Batch | 566 |
| photo | N/A | ⓘTags: Line Sweep/Sliding Window School Photo | NOI 2024 Qualification Contest (zaneyu) | Batch | 297 |
| park | N/A | ⓘTags: Data Structures Amusement Park | NOI 2024 Qualification Contest (cstuart) | Batch | 107 |
| explosives | N/A | ⓘTags: Adhoc, Greedy Explosives | NOI 2024 Qualification Contest (yanhao) | Batch | 50 |
| motest3 | N/A | ⓘTags: Joke, Math MOtest3 | April Fools 2024 (Tyx2019, eulerleonhardfan, dacashew) | Batch | 17 |
| casino | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke Casino Games | April Fools 2024 (ryangohca) | Interactive | 25 |
| maxavg | N/A | ⓘTags: Adhoc Ceiling Max Average | April Fools 2024 (zaneyu) | Batch | 78 |
| stoning | N/A | ⓘTags: Meet in the Middle stoning | RICP Diagnostic Test 2024 (Potato3218) | Batch | 30 |
| mathexam | N/A | ⓘTags: Math, Syntax Math Exam | RICP Diagnostic Test 2024 (Potato3218) | Batch | 30 |
| replacingpavement | N/A | ⓘTags: Adhoc, Graph Theory, Trees Replacing Pavement | December Course 2023 Advanced Final Contest (asbx, back2square1) | Batch | 29 |
| boxes2 | N/A | ⓘTags: Data Structures, Dynamic Programming Boxes | December Course 2023 Advanced Final Contest (Tyx2019) | Batch | 18 |
| ghostrule | N/A | ⓘTags: Graph Theory, Trees Ghost Rule | December Course 2023 Advanced Final Contest (AlphanumericUsername) | Batch | 11 |
| goofyrooks | N/A | ⓘTags: Adhoc goofyrooks | December Course 2023 Elementary Final Contest (penguin133) | Batch | 115 |
| makingparallelograms | N/A | ⓘTags: Adhoc makingparallelograms | December Course 2023 Elementary Final Contest (shoryu386) | Batch | 156 |
| powervillage | N/A | ⓘTags: Greedy powervillage | December Course 2023 Elementary Final Contest | Batch | 102 |
| mothertounge | N/A | ⓘTags: Graph Theory, Joke Mother Tounge | Hello 2024 (oolimry) | Batch | 39 |
| guessproblem3_ex | N/A | ⓘTags: Joke Guess Problem 3 (Extended) | Hello 2024 (ecxx) | Batch | 30 |
| summarising2023 | N/A | ⓘTags: Joke Summarising 2023 | Hello 2024 (siewjh) | Batch | 45 |
| everyonewinstherace | N/A | ⓘTags: Binary Search, Greedy everyonewinstherace | December Course 2023 Elementary Final Contest (oolimry) | Batch | 31 |
| dynamicdag | N/A | ⓘTags: Graph Theory dynamicdag | December Course 2023 Elementary Final Contest (Tyx2019) | Batch | 57 |
| travelbloggers | N/A | ⓘTags: Graph Theory, Joke Travel Bloggers | ROI 2021 | Batch | 6 |
| deciphering_zane_4 | N/A | ⓘTags: Joke Deciphering Zane (IV) | Hello 2024 (ecxx) | Interactive | 31 |
| penguinmountain | N/A | ⓘTags: Syntax penguinmountain | December Course 2023 Elementary Final Contest (penguin133) | Batch | 242 |
| mononono | N/A | ⓘTags: Adhoc Mononono Stack | December Course 2023 Advanced Final Contest (TheRaptor) | Batch | 9 |
| sos | N/A | ⓘTags: Greedy Sum Of Squares | December Course 2023 Advanced Final Contest (pavement) | Batch | 82 |
| maximumtriangle | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Maximum Triangle | Codeforces Edu Round 11 F | Batch | 33 |
| evacuation | N/A | ⓘTags: Data Structures, Divide and Conquer Evacuation | XX Open Cup GP of Tokyo | Batch | 3 |
| guessproblem4_ex | N/A | ⓘTags: Joke Guess Problem 4 (Extended) | Hello 2024 (ryangohca, ecxx) | Interactive | 24 |
| cht | N/A | ⓘTags: Data Structures, Dynamic Programming Convex Hull Trick | Classic Problem | Batch | 55 |
| fitnesscorner | N/A | ⓘTags: Divide and Conquer, Graph Theory, Trees Fitness Corner | Codeforces 321C | Batch | 36 |
| gfriendtree | N/A | ⓘTags: Data Structures, Graph Theory, Trees The 200000 Girlfriends Who Really, Really, Really, Really, Really Love Zane And His Tree | Luogu P3313 | Batch | 23 |
| youtubealgo | N/A | ⓘTags: Data Structures, Dynamic Programming youtubealgo | Dec Course Elem DP 1 Contest (shoryu386) | Batch | 27 |
| zanesgift | N/A | ⓘTags: Dynamic Programming zanesgift | Codeforces 1881E | Batch | 54 |
| atleasttripledate | N/A | ⓘTags: Dynamic Programming, Math atleasttripledate | ABC 178D | Batch | 81 |
| specialgirlfriends | N/A | ⓘTags: Math, Syntax specialgirlfriends | Modified ABC 106C (shoryu386) | Batch | 88 |
| visitinggf | N/A | ⓘTags: Dynamic Programming visitinggf | Luogu P5322 | Batch | 16 |
| figurines | N/A | ⓘTags: Dynamic Programming figurines | Luogu P1164 | Batch | 55 |
| touchinggrass | N/A | ⓘTags: Data Structures, Divide and Conquer, Graph Theory, Trees Touching Grass | Luogu P6329 | Batch | 9 |
| catdog | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Cats or Dogs | JOI Open 2018 | Interactive | 6 |
| cake3 | N/A | ⓘTags: Divide and Conquer, Dynamic Programming cake3 | JOI Spring Camp 2019 | Batch | 14 |
| mrbeast | N/A | ⓘTags: Data Structures, Graph Theory, Trees mrbeast | Codeforces 1899G | Batch | 37 |
| downbad | N/A | ⓘTags: Dynamic Programming downbad | Luogu P1806 | Batch | 51 |
| findinggf | N/A | ⓘTags: Dynamic Programming findinggf | Luogu P1509 | Batch | 20 |
| learning | N/A | ⓘTags: Dynamic Programming learning | Luogu P1802 | Batch | 36 |
| xuehuapiaopiao | N/A | ⓘTags: Binary Search, Data Structures 雪花飘飘 | ABC 248D (Modified) | Batch | 60 |
| loza | N/A | ⓘTags: Data Structures, Graph Theory, Trees Loza | COI 2009 | Batch | 5 |
| tomandjerry | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Tom & Jerry | Codechef | Batch | 13 |
| zoo | N/A | ⓘTags: Dynamic Programming Zoo | ABC 228H | Batch | 18 |
| manyjobs | N/A | ⓘTags: Greedy manyjobs | ABC 131D | Batch | 141 |
| verticallychallenged | N/A | ⓘTags: Data Structures Vertically Challenged Girlfriends | ABC 234 | Batch | 123 |
| createnumber | N/A | ⓘTags: Greedy createnumber | ABC 257E | Batch | 41 |
| minimise | N/A | ⓘTags: Greedy minimise | ABC 101C | Batch | 90 |
| attention | N/A | ⓘTags: Bitmask, Dynamic Programming Attention | Codeforces Beta Round 11D | Batch | 15 |
| hurt | N/A | ⓘTags: Dynamic Programming Hurt | LOJ 3864 | Batch | 12 |
| hypeboy | N/A | ⓘTags: Bitmask, Dynamic Programming Hype Boy | LOJ 3215 | Batch | 13 |
| cookie | N/A | ⓘTags: Dynamic Programming Cookie | Educational Codeforces Round 59 | Batch | 11 |
| teleporting | N/A | ⓘTags: Binary Search teleporting | Codeforces Round 790(Div 4) (modified) | Batch | 57 |
| zanesletters | N/A | ⓘTags: Data Structures Zane's Letters | Classic Problem (ryangohca, siewjh) | Batch | 92 |
| eta | N/A | ⓘTags: Trees eta | ABC 202E | Batch | 66 |
| identifyinggirlfriends | N/A | ⓘTags: Data Structures Identifying Girl Friends | Classic Problem (ryangohca, siewjh) | Batch | 160 |
| nombor | N/A | ⓘTags: Binary Search, Brute Force Nombor | ABC 246D | Batch | 38 |
| blackmagic | N/A | ⓘTags: Bitmask, Brute Force Black Magic | USACO 2023 January Contest, Bronze | Batch | 39 |
| findingpavement | N/A | ⓘTags: Brute Force, Syntax Finding Pavement | Atcoder Code Festival 2016 Final | Batch | 297 |
| movingbasement | N/A | ⓘTags: Binary Search, Greedy Moving Basement | Codeforces 1623C | Batch | 29 |
| traineeline | N/A | ⓘTags: Data Structures traineeline | ABC 247D | Batch | 126 |
| tickethandling | N/A | ⓘTags: Data Structures tickethandling | Dec Course 2023 Elementary Contest 4 (DS I) (shoryu386) | Batch | 132 |
| parallelogramisation | N/A | ⓘTags: Data Structures parallelogramisation | Dec Course 2023 Elementary Contest 4 (DS I) (shoryu386) | Batch | 307 |
| pairofballs | N/A | ⓘTags: Data Structures Pair of Balls | ABC 216D | Batch | 43 |
| segmenttreebeats | N/A | ⓘTags: Data Structures My Soul, Your Beats | Codeforces 1791F | Batch | 56 |
| integralmania | N/A | ⓘTags: Data Structures integralmania | Dec Course 2023 Elementary Contest 4 (DS I) (Tyx2019) | Batch | 87 |
| qualitytime | N/A | ⓘTags: Dynamic Programming Quality Time | Codeforces 922E | Batch | 23 |
| familytree | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Penguin's Adventures | Codeforces 671D | Batch | 10 |
| basement | N/A | ⓘTags: Data Structures, Dynamic Programming Basement | Codeforces 1842C | Batch | 74 |
| gfriendmania | N/A | ⓘTags: Data Structures The 200000 Girlfriends Who Really, Really, Really, Really, Really Love Zane | CSES | Batch | 105 |
| mulgogi | N/A | ⓘTags: Data Structures Mulgogi | Codeforces 817F | Batch | 19 |
| goombatower | N/A | ⓘTags: Binary Search, Data Structures Goomba Tower | Timus 1439 | Batch | 65 |
| cringemeter | N/A | ⓘTags: Greedy Cringe Meter | Codeforces 1844F | Batch | 9 |
| medianontree | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Median on Tree | EOI 2023 Day 2 | Batch | 16 |
| lunchtime | N/A | ⓘTags: Adhoc Lunchtime | ARC 162A | Batch | 52 |
| waterslide | N/A | ⓘTags: Data Structures Water Slide | ROI 2022 | Batch | 6 |
| chope | N/A | ⓘTags: Adhoc Chope | ARC 152A | Batch | 86 |
| cokelesssugar | N/A | ⓘTags: Data Structures, Greedy Coke: Less Sugar | Codeforces 1415E (bensonlzl) | Batch | 51 |
| missingnumber | N/A | ⓘTags: Syntax Missing Number | CSES | Batch | 335 |
| lowelements | N/A | ⓘTags: Adhoc lowelements | ABC 152C | Batch | 158 |
| strikes | N/A | ⓘTags: Graph Theory, Trees Hit you with that dudududududu | POI 2017 | Batch | 58 |
| hunterxhunter | N/A | ⓘTags: Dynamic Programming hunterxhunter | International Autumn Tournament in Informatics 2020 | Batch | 6 |
| maximummonogonosity | N/A | ⓘTags: Dynamic Programming maximummonogonosity | Codeforces 1859E | Batch | 18 |
| progressionspells | N/A | ⓘTags: Greedy, Line Sweep/Sliding Window Progression Spells | Codeforces 1661D | Batch | 53 |
| shuttlerun | N/A | ⓘTags: Greedy shuttlerun | AGC 025C | Batch | 36 |
| buyingcandy | N/A | ⓘTags: Data Structures, Greedy Buying Candy | ABC 308F | Batch | 96 |
| rushing | N/A | ⓘTags: Brute Force, Graph Theory Rushing | DDC23 Final (oolimry) | Batch | 9 |
| trapezes | N/A | ⓘTags: Binary Search, Brute Force Trapezes | DDC23 Final (oolimry) | Batch | 44 |
| attractions | N/A | ⓘTags: Greedy Attractions | DDC23 Final (shoryu386) | Batch | 63 |
| showertheduck | N/A | ⓘTags: Dynamic Programming Shower the Duck | DDC23 Final (oolimry) | Batch | 9 |
| deciphering_zane_3 | N/A | ⓘTags: Information Theory Deciphering Zane 3 | DDC23 Final (oolimry) | Interactive | 3 |
| streakmanipulation | N/A | ⓘTags: Binary Search, Dynamic Programming streakmanipulation | The 2nd Universal Cup. Stage 12: Hefei | Batch | 27 |
| Unbalanced | N/A | ⓘTags: Adhoc unbalanced | ABC 043D | Batch | 117 |
| whackamole | N/A | ⓘTags: Binary Search, Line Sweep/Sliding Window Whack-A-Mole | Codeforces 1852A | Batch | 54 |
| binarylock | N/A | ⓘTags: Bitmask, Meet in the Middle binarylock | Codeforces 1257F | Batch | 27 |
| bossbattle | N/A | ⓘTags: Brute Force, Data Structures Boss Battle | Classic Problem in China | Batch | 20 |
| OrXor | N/A | ⓘTags: Bitmask, Syntax orxor | ABC 197C | Batch | 63 |
| SameMapInTheRpgWorld | N/A | ⓘTags: Syntax samemap | ABC 300B | Batch | 52 |
| nextprime | N/A | ⓘTags: Math, Syntax nextprime | NASS CP Club Training Contest 1 | Batch | 226 |
| losingsleep | N/A | ⓘTags: Brute Force, Math losingsleep | ARC 119A | Batch | 98 |
| gentlepairs | N/A | ⓘTags: Syntax gentlepairs | ABC 187B | Batch | 143 |
| penguingathering | N/A | ⓘTags: Brute Force penguingathering | ABC 156C | Batch | 138 |
| slimes | N/A | ⓘTags: Syntax slimes | ABC 143C | Batch | 256 |
| breakfast | N/A | ⓘTags: Syntax breakfast | Dunjudge Archive | Batch | 512 |
| firstabc | N/A | ⓘTags: Syntax firstabc | ABC 311A | Batch | 261 |
| arcwrecker2 | N/A | ⓘTags: Adhoc, Data Structures arcwrecker2 | ARC 119C | Batch | 46 |
| reverseandmin | N/A | ⓘTags: Adhoc reverseandmin | ARC 142A | Batch | 83 |
| chickensoup | N/A | ⓘTags: Data Structures, Math chickensoup | ABC 256F | Batch | 40 |
| polyomino | N/A | ⓘTags: Syntax polyomino | ABC 322D | Batch | 23 |
| monsters | N/A | ⓘTags: Greedy Monsters | Dec Course 2023 Selection Test (beepbeepsheep) | Batch | 166 |
| flipcards | N/A | ⓘTags: Binary Search, Dynamic Programming Cards | Ucup Stage 8 M (modified) | Batch | 67 |
| flip | N/A | ⓘTags: Graph Theory Flipping Edges | JOIG 2021 | Batch | 65 |
| ippt | N/A | ⓘTags: Syntax IPPT | Dec Course 2023 Selection Test (errorgorn) | Batch | 641 |
| staircase | N/A | ⓘTags: Greedy Staircase | ABC 148D | Batch | 257 |
| plantingpotatoes | N/A | ⓘTags: Adhoc, Binary Search Planting Potatoes | ABC 300F | Batch | 18 |
| humantrafficking | N/A | ⓘTags: Graph Theory Human Trafficking | Italian Informatics Olympiad | Batch | 13 |
| sunshine | N/A | ⓘTags: Dynamic Programming Sunshine | RI Novcourse Final Contest 2023 (zixuan, ryangohca) | Batch | 22 |
| conductslip | N/A | ⓘTags: Greedy Conduct Slip | RI Novcourse Final Contest 2023 (RandomPerson, Tyx2019) | Batch | 45 |
| eeniemeenie | N/A | ⓘTags: Syntax Eenie Meenie | HCI November Final Contest 2023 (shoryu386) | Batch | 341 |
| mountainbridges | N/A | ⓘTags: Data Structures, Dynamic Programming mountainbridges | HCI November Final Contest 2023 (huangqr) | Batch | 42 |
| sortingtrainers | N/A | ⓘTags: Adhoc Sorting Trainers | Bologna IOI in Teams 2017 | Batch | 70 |
| deforestation | N/A | ⓘTags: Binary Search, Greedy deforestation | HCI November Final Contest 2023 (TheRaptor) | Batch | 125 |
| boardvision | N/A | ⓘTags: Syntax Board Vision | RI Novcourse Final Contest 2023 (zixuan, nianhe) | Batch | 43 |
| devour | N/A | ⓘTags: Adhoc devour | HCI November Final Contest 2023 (penguin133) | Batch | 112 |
| mathclass | N/A | ⓘTags: Joke, Math Math Class | April Fools 2024 (oolimry) | Batch | 29 |
| candles | N/A | ⓘTags: Adhoc candles | ABC 107C | Batch | 96 |
| game_ioi13 | N/A | ⓘTags: Data Structures, Explicitly Excluded (from IOI) game | IOI 2013 | Interactive | 9 |
| robotcontest | N/A | ⓘTags: Adhoc, Constructive Algorithms, Graph Theory Robot Contest | IOI 2023 (Day 2) | Interactive | 5 |
| dkdk | N/A | ⓘTags: Joke DKDK (PITAPAT) | April Fools 2024 (ryangohca) | Batch | 14 |
| seagame | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees seagame | ABC 218G | Batch | 20 |
| fenwicktree_easy | N/A | ⓘTags: Syntax fenwicktree_easy | RI November Course 2023 Diagnostic Test (Potato3218, nianhe) | Batch | 136 |
| beechtree | N/A | ⓘTags: Graph Theory, Trees Beech Tree | IOI 2023 (Day 2) | Interactive | 5 |
| overtaking | N/A | ⓘTags: Adhoc, Binary Search Overtaking | IOI 2023 (Day 2) | Interactive | 6 |
| flamethrower_ex | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window flamethrower_ex | RI November Course 2023 Diagnostic Test (Potato3218) | Batch | 54 |
| gotoschool_ex | N/A | ⓘTags: Syntax gotoschool_ex | RI November Course 2023 Diagnostic Test (NeeNawAmbulance, nianhe) | Batch | 114 |
| longesttrip | N/A | ⓘTags: Graph Theory, Information Theory Longest Trip | IOI 2023 (Day 1) | Interactive | 10 |
| soccer | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory Soccer Stadium | IOI 2023 (Day 1) | Interactive | 5 |
| closing | N/A | ⓘTags: Data Structures, Graph Theory, Greedy, Trees Closing Time | IOI 2023 (Day 1) | Interactive | 15 |
| melons_joig | N/A | ⓘTags: Binary Search, Dynamic Programming Melons | JOIG 2021/2022 | Batch | 35 |
| miracleflover | N/A | ⓘTags: Joke Miracle Flover | Hello 2024 (ryangohca, ecxx, leyi) | Interactive | 26 |
| packingducks | N/A | ⓘTags: Brute Force, Dynamic Programming packingducks | Classic Problem | Batch | 69 |
| magicspell | N/A | ⓘTags: Line Sweep/Sliding Window magicspell | AOI 2023 Day 2 (shoryu386) | Batch | 29 |
| magicboard | N/A | ⓘTags: Adhoc, Math magicboard | AOI 2023 Day 2 (shoryu386) | Batch | 42 |
| alienalien | N/A | ⓘTags: Syntax alienalien | AOI 2023 Day 1 (shoryu386) | Batch | 116 |
| magicstring | N/A | ⓘTags: Syntax magicstring | AOI 2023 Day 2 (shoryu386) | Batch | 62 |
| matsuri | N/A | ⓘTags: Dynamic Programming matsuri | AOI 2023 Day 1 (shoryu386) | Batch | 28 |
| mergeguessproblem | N/A | ⓘTags: Joke Merge Guess Problem | Hello 2024 (oolimry) | Batch | 41 |
| motivation | N/A | ⓘTags: Data Structures, Greedy Motivation is Dead | AOI 2023 Day 1 (shoryu386) | Batch | 85 |
| threetwentyoneam | N/A | ⓘTags: Dynamic Programming threetwentyoneam | AOI 2023 Day 1 (shoryu386) | Batch | 15 |
| nprime2 | N/A | ⓘTags: Joke Funny Prime | April Fools 2024 (errorgorn, oolimry) | Batch | 23 |
| galaxycollapse | N/A | ⓘTags: Graph Theory galaxycollapse | AOI 2023 Day 2 (shoryu386) | Batch | 14 |
| jamestreet | N/A | ⓘTags: Joke Jame Street | April Fools 2024 (oolimry) | Communication | 67 |
| kanji | N/A | ⓘTags: Information Theory kanji | Dunjudge Archive | Communication | 3 |
| messenger | N/A | ⓘTags: Information Theory messenger | Dunjudge Archive | Communication | 5 |
| abc_apio23 | N/A | ⓘTags: Constructive Algorithms, Divide and Conquer, Information Theory, Joke Alice, Bob and Circuit | APIO 2023 | Batch | 40 |
| sequence_apio23 | N/A | ⓘTags: Binary Search, Data Structures, Line Sweep/Sliding Window, Math Sequence | APIO 2023 | Interactive | 9 |
| cyberland_apio23 | N/A | ⓘTags: Graph Theory Cyberland | APIO 2023 | Interactive | 19 |
| realfun | N/A | ⓘTags: Binary Search Real Fun | CPSPC 2010 | Batch | 4 |
| roadtrip | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Road Trip | Classic Problem | Batch | 21 |
| pandanumbers | N/A | ⓘTags: Data Structures, Meet in the Middle Numbers | Dunjudge Archive | Batch | 20 |
| doors | N/A | ⓘTags: Graph Theory Doors | Dunjudge Archive | Batch | 10 |
| treasures | N/A | ⓘTags: Graph Theory Stolen Treasures | Dunjudge Archive | Batch | 20 |
| kamion | N/A | ⓘTags: Dynamic Programming kamion | COCI 2010/2011 | Batch | 3 |
| morefun | N/A | ⓘTags: Dynamic Programming Even more fun | CPSPC 2010 | Batch | 4 |
| thief | N/A | ⓘTags: Dynamic Programming thief | Dunjudge Archive | Batch | 7 |
| conlang | N/A | ⓘTags: Syntax conlang | HCI EC³ Beginner Contest (geometric) | Batch | 180 |
| noodlestore | N/A | ⓘTags: Data Structures noodlestore | HCI EC³ Beginner Contest (WH8) | Batch | 49 |
| hackthectf | N/A | ⓘTags: Binary Search, Greedy hackthectf | HCI EC³ Beginner Contest (blackscreen1, shoryu386) | Batch | 11 |
| waterbottles | N/A | ⓘTags: Adhoc, Math waterbottles | HCI EC³ Beginner Contest (AlphanumericUsername) | Batch | 93 |
| parallelogramfest | N/A | ⓘTags: Dynamic Programming parallelogramfest | HCI EC³ Beginner Contest (Tyx2019) | Batch | 14 |
| islands2 | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Islands | IOI 2008 | Batch | 8 |
| rooms | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees rooms | RI Mock NOI 2015 | Batch | 11 |
| toxicwaste | N/A | ⓘTags: Graph Theory Toxic Waste | Dunjudge Archive | Batch | 6 |
| steeple | N/A | ⓘTags: Graph Theory Cow Steeplechase | USACO 2011 Nov, Gold | Batch | 5 |
| pancake_ex | N/A | ⓘTags: Brute Force, Meet in the Middle Pancake (Extreme) | Classic Problem | Batch | 5 |
| expressways | N/A | ⓘTags: Graph Theory expressways | Dunjudge Archive | Batch | 12 |
| gugdance | N/A | ⓘTags: Constructive Algorithms, Graph Theory gugdance | Dunjudge Archive | Batch | 4 |
| kas | N/A | ⓘTags: Dynamic Programming kas | COCI 2016/2017 Round #4 | Batch | 12 |
| towns | N/A | ⓘTags: Graph Theory, Information Theory, Trees Towns | IOI 2015 | Interactive | 3 |
| sorting | N/A | ⓘTags: Binary Search, Constructive Algorithms Sorting | IOI 2015 | Interactive | 3 |
| teams | N/A | ⓘTags: Constructive Algorithms, Data Structures, Dynamic Programming Teams | IOI 2015 | Interactive | 2 |
| guessproblem4 | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke Guess Problem 4 | April Fools 2023 (ryangohca, ecxx) | Interactive | 10 |
| deciphering_zane_ex | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke Decusohrting Znakeje: extendied c34s8hb | April Fools 2023 (ecxx, Xiaoyang, leyi) | Interactive | 15 |
| scales | N/A | ⓘTags: Brute Force, Information Theory Scales | IOI 2015 | Interactive | 3 |
| guessproblem3 | N/A | ⓘTags: Joke Guess Problem 3 | April Fools 2023 (ecxx) | Batch | 18 |
| boxes | N/A | ⓘTags: Dynamic Programming, Greedy Boxes with souvenirs | IOI 2015 | Interactive | 13 |
| qualityinspections | N/A | ⓘTags: Data Structures qualityinspections | ANDSS Coding Head Sel 2023 Duel (penguin133, shoryu386) | Batch | 23 |
| trivialexam_ex_ex | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke trivialexam_ex_ex | April Fools 2023 (oolimry, elainagrey, Xiaoyang) | Batch | 64 |
| paint_ioi | N/A | ⓘTags: Adhoc, Dynamic Programming Paint By Numbers | IOI 2016 | Interactive | 7 |
| shortcut | N/A | ⓘTags: Binary Search, Graph Theory, Line Sweep/Sliding Window Shortcut | IOI 2016 | Interactive | 2 |
| ducktransport | N/A | ⓘTags: Binary Search, Greedy ducktransport | ANDSS Coding Head Sel 2023 Duel (bron, shoryu386) | Batch | 59 |
| trivialexam_ex | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke trivialexam_ex | April Fools 2023 (Xiaoyang) | Batch | 14 |
| 1402_2 | N/A | ⓘTags: Graph Theory, Joke 1402_2 | April Fools 2023 (blackscreen1) | Batch | 24 |
| soos | N/A | ⓘTags: Graph Theory, Joke, Math soos | April Fools 2023 (hmm) | Batch | 14 |
| findinggrass_ex | N/A | ⓘTags: Joke Helping an ex-cs student touch grass while blindfolded with my insane programming skills in another world | April Fools 2023 (siewjh) | Batch | 33 |
| sniper | N/A | ⓘTags: Math sniper | ANDSS Coding Head Sel 2023 Duel (shoryu386) | Batch | 53 |
| motest2 | N/A | ⓘTags: Joke, Math MOtest2 | April Fools 2023 (Tyx2019) | Batch | 45 |
| onlineexam | N/A | ⓘTags: Constructive Algorithms, Explicitly Excluded (from IOI), Information Theory, Joke, Math Online Exam | April Fools 2023 (zengminghao) | Interactive | 9 |
| trivialexam | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke 小菜一碟 | April Fools 2023 (Xiaoyang) | Batch | 52 |
| guessproblem2 | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke Guess Problem 2 | April Fools 2023 (ryangohca) | Batch | 19 |
| whatisthisactf | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke What is this, a CTF? | April Fools 2023 (tux) | Interactive | 18 |
| nevergiveup | N/A | ⓘTags: Joke Never Give Up | April Fools 2023 (bron, penguin133) | Batch | 98 |
| hiddenarray | N/A | ⓘTags: Joke, Math Hidden Array | April Fools 2023 (ecxx) | Batch | 11 |
| goodprogrammer | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke Be a Good Programmer | April Fools 2023 (shoryu386) | Batch | 164 |
| gerrymandering_ex | N/A | ⓘTags: Greedy Gerrymandering (Extreme) | Dec Course 2021 BAPS (modified) (beepbeepsheep) | Batch | 4 |
| toxic | N/A | ⓘTags: Binary Search, Information Theory Toxic Gene | NOI 2023 Finals (bensonlzl) | Interactive | 16 |
| topical | N/A | ⓘTags: Adhoc Topical | NOI 2023 Finals (bensonlzl) | Batch | 171 |
| inspections | N/A | ⓘTags: Data Structures Inspections | NOI 2023 Finals (bensonlzl) | Batch | 81 |
| airplane | N/A | ⓘTags: Graph Theory, Greedy Airplane | NOI 2023 Finals (bensonlzl, oolimry) | Batch | 103 |
| curtains | N/A | ⓘTags: Data Structures, Divide and Conquer Curtains | NOI 2023 Finals (bensonlzl) | Batch | 63 |
| pplow | N/A | ⓘTags: Line Sweep/Sliding Window pplow | Classic Problem | Batch | 25 |
| deciphering_zane | N/A | ⓘTags: Explicitly Excluded (from IOI), Joke Dceiprhenig Zane | April Fools 2023 (Xiaoyang, leyi, ecxx, tux, Craftless, Gladius3482) | Batch | 32 |
| simplebridges | N/A | ⓘTags: Math, Syntax simplebridges | ANDSS February 2023 Contest (shoryu386) | Batch | 411 |
| network | N/A | ⓘTags: Graph Theory, Greedy, Trees network | NOI 2023 Qualification Contest (errorgorn) | Batch | 90 |
| doll_noi | N/A | ⓘTags: Data Structures, Greedy doll_noi | NOI 2023 Qualification Contest (yanhao, oolimry) | Batch | 177 |
| burgers | N/A | ⓘTags: Binary Search, Data Structures, Math burgers | NOI 2023 Qualification Contest (oolimry, bensonlzl, yanhao) | Batch | 191 |
| swords | N/A | ⓘTags: Syntax swords | NOI 2023 Qualification Contest (yanhao) | Batch | 458 |
| area_noi | N/A | ⓘTags: Syntax area_noi | NOI 2023 Qualification Contest (yanhao) | Batch | 1011 |
| railroad | N/A | ⓘTags: Graph Theory, Greedy Roller Coaster Railroad | IOI 2016 | Interactive | 5 |
| simurgh | N/A | ⓘTags: Graph Theory, Information Theory, Trees Simurgh | IOI 2017 | Interactive | 3 |
| iqtest4 | N/A | ⓘTags: Math iqtest4 | Valentine's Day Contest 2023 (zixuan) | Batch | 10 |
| xorsplit | N/A | ⓘTags: Bitmask, Divide and Conquer, Explicitly Excluded (from IOI) xorsplit | Valentine's Day Contest 2023 (blackscreen1, pavement, maomao90, zaneyu) | Batch | 3 |
| motest | N/A | ⓘTags: Math MOtest | Valentine's Day Contest 2023 (Tyx2019) | Batch | 28 |
| messages | N/A | ⓘTags: Information Theory Messages | Valentine's Day Contest 2023 (beepbeepsheep) | Communication | 6 |
| squidgame | N/A | ⓘTags: Data Structures Squid Game 2: Hot Chocolate | Valentine's Day Contest 2023 (Wenkai, beepbeepsheep) | Batch | 4 |
| fractional_knapsack | N/A | ⓘTags: Greedy fractional_knapsack | Classic Problem | Batch | 32 |
| magiccarps | N/A | ⓘTags: Brute Force, Syntax magiccarps | ANDSS Contest 2 (Greedy and Bruteforce) (shoryu386) | Batch | 122 |
| binaryspells | N/A | ⓘTags: Greedy, Math binaryspells | ANDSS Contest 2 (Greedy and Bruteforce) (shoryu386) | Batch | 67 |
| cny | N/A | ⓘTags: Greedy cny | ANDSS Contest 2 (Greedy and Bruteforce) (LCJLY) | Batch | 154 |
| sandcity | N/A | ⓘTags: Dynamic Programming sandcity | Random Idea (shoryu386, Reverberate) | Batch | 37 |
| lightsflip | N/A | ⓘTags: Adhoc, Dynamic Programming lightsflip | Dunjudge Archive | Batch | 24 |
| happyarrays | N/A | ⓘTags: Dynamic Programming, Line Sweep/Sliding Window Happy Arrays | Classic Problem (penguin133) | Batch | 30 |
| hieroglyphs | N/A | ⓘTags: Graph Theory, Math hieroglyphs | ACM/ICPC World Finals 2011 | Batch | 2 |
| celldivision | N/A | ⓘTags: Binary Search, Math celldivision | Random Idea (shoryu386) | Batch | 37 |
| numberfun | N/A | ⓘTags: Dynamic Programming numberfun | Dunjudge Archive | Batch | 53 |
| lightsout | N/A | ⓘTags: Constructive Algorithms, Dynamic Programming, Graph Theory, Trees Light's Out | Dunjudge Archive | Interactive | 8 |
| rbpoints | N/A | ⓘTags: Data Structures, Greedy rbpoints | ABC 091C | Batch | 18 |
| removemq | N/A | ⓘTags: Brute Force, Data Structures, Greedy removemq | ARC 098E | Batch | 7 |
| fliprect | N/A | ⓘTags: Adhoc, Data Structures, Dynamic Programming fliprect | ARC 081F | Batch | 3 |
| candies2 | N/A | ⓘTags: Greedy candies2 | ARC 064A | Batch | 27 |
| cipele | N/A | ⓘTags: Binary Search, Greedy cipele | COCI 2018/2019 | Batch | 6 |
| merchant2 | N/A | ⓘTags: Greedy merchant2 | ABC 047D | Batch | 13 |
| colouring | N/A | ⓘTags: Graph Theory colouring | AGC 012B | Batch | 9 |
| zamjena | N/A | ⓘTags: Graph Theory zamjena | COCI 2018/2019 | Batch | 10 |
| dogmonkey | N/A | ⓘTags: Math dogmonkey | ABC 065C | Batch | 53 |
| goodgame | N/A | ⓘTags: Explicitly Excluded (from IOI), Math goodgame | ARC 072D | Batch | 23 |
| split2 | N/A | ⓘTags: Graph Theory, Greedy, Trees Split | December Course 2018 Elementary Final Contest | Batch | 12 |
| personalspace | N/A | ⓘTags: Binary Search, Dynamic Programming, Line Sweep/Sliding Window personalspace | December Course 2018 Elementary Final Contest | Batch | 20 |
| nou | N/A | ⓘTags: Adhoc no "u" | December Course 2018 Elementary Final Contest (bensonlzl) | Batch | 82 |
| socks | N/A | ⓘTags: Adhoc, Syntax socks | December Course 2018 Elementary Final Contest (Damian) | Batch | 67 |
| souvenirs2 | N/A | ⓘTags: Data Structures, Math souvenirs2 | ARC 068C | Batch | 7 |
| competitiveteams | N/A | ⓘTags: Graph Theory, Square Root Decomposition Competitive Teams | HackerRank | Batch | 6 |
| avoidcollision | N/A | ⓘTags: Dynamic Programming, Graph Theory avoidcollision | ARC 090C | Batch | 6 |
| build | N/A | ⓘTags: Graph Theory, Greedy build | ABC 065D | Batch | 24 |
| nuskevsphantom | N/A | ⓘTags: Graph Theory, Trees Nuske vs Phantom Thnook | AGC 015C | Batch | 7 |
| treeinteger | N/A | ⓘTags: Graph Theory, Greedy, Trees treeinteger | ARC 063E | Batch | 5 |
| shorten | N/A | ⓘTags: Brute Force, Graph Theory, Trees shorten | AGC 001C | Batch | 18 |
| squaregraph | N/A | ⓘTags: Graph Theory Square Graph | AGC 011C | Batch | 4 |
| masquerade | N/A | ⓘTags: Graph Theory, Math masquerade | BZOJ 1064 | Batch | 2 |
| restoreroad | N/A | ⓘTags: Graph Theory Restore Road | ABC 074D | Batch | 8 |
| kfc | N/A | ⓘTags: Math, Syntax kfc | ANDSS Contest 1 (Syntax) (haydendoo) | Batch | 114 |
| passwords | N/A | ⓘTags: Graph Theory passwords | Dunjudge Archive | Batch | 20 |
| harmony | N/A | ⓘTags: Graph Theory harmony | Dunjudge Archive | Batch | 6 |
| homeworkextension | N/A | ⓘTags: Syntax homeworkextension | ANDSS Contest 1 (Syntax) (Josh28) | Batch | 114 |
| rabbitmilk | N/A | ⓘTags: Greedy rabbitmilk | Dunjudge Archive | Batch | 63 |
| judgequeue | N/A | ⓘTags: Data Structures judgequeue | Dunjudge Archive | Interactive | 11 |
| ultimateifelse | N/A | ⓘTags: Syntax Ultimate ifelse | ANDSS Contest 1 (Syntax) (LCJLY) | Batch | 463 |
| duckwander | N/A | ⓘTags: Syntax duckwander | ANDSS Contest 1 (Syntax) (shoryu386) | Batch | 226 |
| guards_easy | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming, Joke Guards (Easy) | IOI 2014 Practice Contest 2 (modified) (beepbeepsheep) | Batch | 11 |
| volcanic | N/A | ⓘTags: Binary Search, Graph Theory Volcanic Travel | ANDSS Welcome 2023 (Day 2) (shoryu386) | Batch | 21 |
| palindromicfever | N/A | ⓘTags: Dynamic Programming, Math Palindromic Fever | ANDSS Welcome 2023 (Day 2) (shoryu386) | Batch | 20 |
| belittle | N/A | ⓘTags: Dynamic Programming belittle | ANDSS Welcome 2023 (Day 2) (shoryu386) | Batch | 40 |
| numbergame | N/A | ⓘTags: Binary Search numbergame | ANDSS Welcome 2023 (Day 2) (shoryu386) | Batch | 51 |
| snowball | N/A | ⓘTags: Greedy, Syntax snowball | ANDSS Welcome 2023 (Day 1) (shoryu386) | Batch | 324 |
| swayingflowers | N/A | ⓘTags: Math, Syntax swayingflowers | ANDSS Welcome 2023 (Day 1) (shoryu386) | Batch | 464 |
| telephone | N/A | ⓘTags: Syntax Telephone Game | ANDSS Welcome 2023 (Day 1) (shoryu386) | Batch | 252 |
| modulochain | N/A | ⓘTags: Math, Syntax modulochain | Anderson Trg (shoryu386) | Batch | 223 |
| perfectprimes | N/A | ⓘTags: Math perfectprimes | Anderson Fluff Contest (Josh28, shoryu386) | Batch | 55 |
| duckwar | N/A | ⓘTags: Binary Search, Greedy, Math duckwar | Anderson Fluff Contest (shoryu386) | Batch | 26 |
| nicenumber | N/A | ⓘTags: Joke nicenumber | Anderson Fluff Contest (haydendoo) | Batch | 178 |
| football | N/A | ⓘTags: Dynamic Programming football | Anderson Fluff Contest (LCJLY) | Batch | 21 |
| veryeasyproblem | N/A | ⓘTags: Joke veryeasyproblem | Anderson Fluff Contest (shoryu386) | Batch | 784 |
| royalguards | N/A | ⓘTags: Data Structures, Dynamic Programming royalguards | AMOS OI 2022 (buffed) (shoryu386) | Batch | 16 |
| guards_ex | N/A | ⓘTags: Adhoc, Greedy, Joke Guards (Extreme) | Zane (zaneyu, ryangohca) | Batch | 60 |
| nostatement | N/A | ⓘTags: Joke, Math nostatement | Dunjudge Archive | Batch | 33 |
| guessproblem | N/A | ⓘTags: Information Theory, Joke Guess Problem | peepeepoopoo (Potato3218, ryangohca) | Batch | 59 |
| reopening | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Trees Reopening Shop | Dec Course 2022 BAPS (errorgorn, Halogen) | Batch | 34 |
| kthpar | N/A | ⓘTags: Divide and Conquer, Explicitly Excluded (from IOI), Graph Theory, Trees JiaHng couldn’t solve this lol | folklore (errorgorn) | Batch | 4 |
| removalcosts | N/A | ⓘTags: Adhoc, Greedy, Math Removal Costs | Dec Course 2022 BAPS (maomao90) | Batch | 31 |
| findinggrass | N/A | ⓘTags: Data Structures, Greedy Finding Grass | Dec Course 2022 BAPS (hmm) | Batch | 22 |
| valves | N/A | ⓘTags: Data Structures Valves | Dec Course 2022 BAPS (beepbeepsheep) | Batch | 3 |
| hungryrabbits3 | N/A | ⓘTags: Binary Search, Greedy Hungry Rabbits 3 | Dec Course 2022 BAPS (bensonlzl) | Batch | 6 |
| lctocd | N/A | ⓘTags: Brute Force, Data Structures, Divide and Conquer, Graph Theory, Greedy, Trees LCT OCD | Atcoder Nikkei Finals 2019 | Batch | 9 |
| gohcart | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory Goh Cart | Codeforces 1715E (f0restf1re) | Batch | 27 |
| newjeans | N/A | ⓘTags: Divide and Conquer, Dynamic Programming Bob's New Jeans | Codeforces 868F | Batch | 34 |
| pipes | N/A | ⓘTags: Graph Theory Pipes | CEOI 2015 | Batch | 22 |
| sherlockgraph | N/A | ⓘTags: Graph Theory sherlockgraph | HackerRank | Batch | 3 |
| semiconnected | N/A | ⓘTags: Graph Theory semiconnected | Dunjudge Archive | Batch | 19 |
| police | N/A | ⓘTags: Dynamic Programming, Graph Theory Police Station | CPSPC 2017 | Batch | 23 |
| reachability | N/A | ⓘTags: Dynamic Programming, Graph Theory reachability | Classic Problem | Batch | 27 |
| gotoubun | N/A | ⓘTags: Data Structures, Dynamic Programming gotoubun | folklore (errorgorn) | Batch | 45 |
| hld2 | N/A | ⓘTags: Data Structures, Graph Theory, Trees hld2 | LOJ P3532 | Batch | 16 |
| dynamicdiameter2 | N/A | ⓘTags: Graph Theory, Trees Dynamic Diameter 2 | RMI 2020 | Batch | 2 |
| letterstamper_ex | N/A | ⓘTags: Dynamic Programming Letter Stamper (Extreme) | Google Code Jam 2010 (modified) (errorgorn, ryangohca) | Batch | 10 |
| rainbowroad_ex | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Rainbow Road (Extreme) | HCI-RI 2020 May Contest (modified) (errorgorn) | Batch | 12 |
| socialdistance | N/A | ⓘTags: Adhoc, Graph Theory, Trees Social Distance | Codeforces 1381D | Batch | 5 |
| rootedlca | N/A | ⓘTags: Graph Theory, Trees Rooted LCA | folklore (errorgorn) | Batch | 76 |
| dynamicdiameter | N/A | ⓘTags: Graph Theory, Trees Dynamic Diameter | CEOI 2019 | Batch | 6 |
| jumpontree | N/A | ⓘTags: Graph Theory, Trees jumpontree | yosupo's judge | Batch | 100 |
| candyboxes | N/A | ⓘTags: Data Structures candyboxes | Rujia Liu's Present 3 (Kattis) | Batch | 53 |
| iqtest3 | N/A | ⓘTags: Constructive Algorithms, Graph Theory iqtest3 | AGC 50A | Batch | 64 |
| hld | N/A | ⓘTags: Data Structures, Graph Theory, Trees hld | LOJ P139 | Batch | 52 |
| splittingtree | N/A | ⓘTags: Graph Theory, Trees Splitting Tree | LOJ P3213 | Batch | 1 |
| love | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory, Trees What is love? | Luogu P8280 | Batch | 10 |
| sumalllis | N/A | ⓘTags: Bitmask, Dynamic Programming, Joke Sum All LIS | Luogu P4484 (modified) (zaneyu) | Batch | 13 |
| feelgood | N/A | ⓘTags: Dynamic Programming, Math Feel Good | Luogu P2602 | Batch | 31 |
| closingshop | N/A | ⓘTags: Dynamic Programming, Graph Theory Closing Shop | Codeforces 721C | Batch | 40 |
| redblacktree | N/A | ⓘTags: Adhoc, Graph Theory, Trees redblacktree | Codeforces 1156D | Batch | 54 |
| obstacletree | N/A | ⓘTags: Dynamic Programming, Graph Theory, Greedy, Trees obstacletree | Codeforces 1528A | Batch | 70 |
| treepruning2 | N/A | ⓘTags: Graph Theory, Greedy, Trees Pruning Trees | Codeforces 1593E (modified) (ecxx) | Batch | 40 |
| treepruning | N/A | ⓘTags: Brute Force, Graph Theory, Trees Tree Pruning | Codeforces 1593E | Batch | 68 |
| arraypartition | N/A | ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window arraypartition | Codeforces 487B | Batch | 46 |
| bracketcoloring | N/A | ⓘTags: Dynamic Programming bracketcoloring | Codeforces 149D | Batch | 7 |
| segmentoperations | N/A | ⓘTags: Data Structures, Dynamic Programming, Math Segment Operations | Codeforces 1743F | Batch | 16 |
| paintrectangles | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window paintrectangles | Codeforces 983D | Batch | 10 |
| specialmultiset | N/A | ⓘTags: Data Structures specialmultiset | Codeforces 981G | Batch | 16 |
| shuffling | N/A | ⓘTags: Dynamic Programming Shuffling | ARC 065D | Batch | 15 |
| obstacles | N/A | ⓘTags: Binary Search, Dynamic Programming obstacles | Codeforces 360B | Batch | 44 |
| simpletask | N/A | ⓘTags: Data Structures A Simple Task | Codeforces 558E | Batch | 52 |
| purplecandy | N/A | ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window Purple Candy | Classic Problem (shenxy13, ryangohca) | Batch | 96 |
| exhibition | N/A | ⓘTags: Greedy Exhibition | JOI 2018/2019 Final Round | Batch | 66 |
| add1 | N/A | ⓘTags: Adhoc, Data Structures, Explicitly Excluded (from IOI), Joke, Math Add 1 | April Fools 2024 (ryangohca) | Batch | 20 |
| copyandpaste | N/A | ⓘTags: Greedy Copy And Paste | Codeforces 1688F | Batch | 15 |
| packingpests | N/A | ⓘTags: Data Structures, Dynamic Programming packingpests | Kattis | Batch | 18 |
| flipthat | N/A | ⓘTags: Dynamic Programming, Math Flip That | Codeforces 1630D | Batch | 20 |
| lualectures | N/A | ⓘTags: Constructive Algorithms, Greedy Lua Lectures | Classic Problem | Batch | 168 |
| luarulers | N/A | ⓘTags: Greedy Lua Rulers | Codeforces 1748C | Batch | 81 |
| placingrouters | N/A | ⓘTags: Greedy Placing Routers | Codeforces 1764E | Batch | 23 |
| movingboxes | N/A | ⓘTags: Data Structures, Greedy movingboxes | Codeforces 1030F | Batch | 16 |
| mountainrange | N/A | ⓘTags: Data Structures, Greedy mountainrange | Codeforces 935F | Batch | 16 |
| buygifts | N/A | ⓘTags: Binary Search buygifts | Codeforces 1619D | Batch | 78 |
| addk | N/A | ⓘTags: Data Structures, Math addk | EJOI 2021 | Batch | 55 |
| buycoke | N/A | ⓘTags: Dynamic Programming Buying Coke | Kattis | Batch | 69 |
| letterstamper | N/A | ⓘTags: Dynamic Programming Letter Stamper | Google Code Jam 2010 (modified) | Batch | 59 |
| lratio | N/A | ⓘTags: Data Structures, Dynamic Programming L + Ratio | Алгоритм 2022 | Batch | 32 |
| weightlifting | N/A | ⓘTags: Dynamic Programming weightlifting | Google Code Jam 2022 Round 1A | Batch | 7 |
| lamps | N/A | ⓘTags: Graph Theory Lamps | Codeforces 1290C | Batch | 11 |
| friendlyrooks | N/A | ⓘTags: Brute Force, Greedy Friendly Rooks | 2022 December Course Diagnostic Test (errorgorn) | Batch | 15 |
| badchef | N/A | ⓘTags: Graph Theory Bad Chef | NUS CS3233 2020 (Kattis) | Batch | 20 |
| rangedeleting | N/A | ⓘTags: Line Sweep/Sliding Window Range Deleting | Codeforces 1167E | Batch | 28 |
| anutforajaroftuna | N/A | ⓘTags: Dynamic Programming, Greedy A Nut For A Jar Of Tuna | Codeforces 730J | Batch | 30 |
| stories | N/A | ⓘTags: Dynamic Programming, Graph Theory Stories Cat | RI November Course Stage 2 Selection Test 2022 (AJR) | Batch | 50 |
| garden | N/A | ⓘTags: Graph Theory Garden Cat | RI November Course Stage 2 Selection Test 2022 (tux, ryangohca) | Batch | 58 |
| routine | N/A | ⓘTags: Binary Search Routine Cat | RI November Course Stage 2 Selection Test 2022 (wangy412) | Batch | 181 |
| eating | N/A | ⓘTags: Data Structures Eating Cat | RI November Course Stage 2 Selection Test 2022 (wangy412) | Batch | 149 |
| reading | N/A | ⓘTags: Math, Syntax Reading Cat | RI November Course Stage 2 Selection Test 2022 (wangy412) | Batch | 194 |
| choochoo | N/A | ⓘTags: Syntax Choo Choo | RI-HCI Final Contest 2022 (bensonlzl) | Batch | 503 |
| superpiece | N/A | ⓘTags: Adhoc, Graph Theory Superpiece | EGOI 2022 Day 2 | Batch | 7 |
| datacenters | N/A | ⓘTags: Adhoc Data Centers | EGOI 2022 Day 2 | Batch | 17 |
| tourists | N/A | ⓘTags: Data Structures, Graph Theory, Trees Tourists | EGOI 2022 Day 1 | Batch | 7 |
| subsetmex | N/A | ⓘTags: Adhoc Subset Mex | EGOI 2022 Day 1 | Batch | 29 |
| legowall | N/A | ⓘTags: Dynamic Programming, Math Lego Wall | EGOI 2022 Day 1 | Batch | 15 |
| candycrush | N/A | ⓘTags: Dynamic Programming Candy Crush | Dunjudge Archive | Batch | 4 |
| alternating | N/A | ⓘTags: Dynamic Programming, Greedy alternating | BOI 2018 | Batch | 3 |
| lampice | N/A | ⓘTags: Binary Search, Divide and Conquer, Dynamic Programming, Graph Theory, Trees lampice | COCI 2019/2020 | Batch | 4 |
| naturalpark | N/A | ⓘTags: Graph Theory, Information Theory naturalpark | JOISC 2017 | Interactive | 2 |
| evolution | N/A | ⓘTags: Graph Theory, Trees Evolution | Korean IOI Selection Day 1 | Batch | 11 |
| dzumbus | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Džumbus | COCI 2019/2020 | Batch | 12 |
| unitedcows | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window United Cows | USACO 2021 Open, Gold | Batch | 15 |
| flyingsquirrel | N/A | ⓘTags: Data Structures, Dynamic Programming, Greedy, Slope Trick Flying Squirrel | Korean IOI Selection Day 1 | Batch | 15 |
| delegation | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Delegation | USACO 2020 Feb, Gold | Batch | 7 |
| sjeckanje | N/A | ⓘTags: Data Structures, Greedy sjeckanje | COCI 2020/2021 | Batch | 5 |
| joker | N/A | ⓘTags: Adhoc, Divide and Conquer, Graph Theory joker | BOI 2020 | Batch | 5 |
| sumzero | N/A | ⓘTags: Adhoc, Binary Search, Dynamic Programming, Graph Theory, Greedy sumzero | RMI 2020 | Batch | 17 |
| izbori | N/A | ⓘTags: Adhoc, Data Structures, Math izbori | COCI 2021/2022 | Batch | 8 |
| sandcastle2 | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory Sandcastle 2 | JOI 2022 Final Round | Batch | 3 |
| railwaytrip2 | N/A | ⓘTags: Data Structures Railway Trip 2 | JOI 2022 Final Round | Batch | 6 |
| election_joi22 | N/A | ⓘTags: Dynamic Programming Let's Win the Election | JOI 2022 Final Round | Batch | 12 |
| selfstudy | N/A | ⓘTags: Binary Search, Greedy Self Study | JOI 2022 Final Round | Batch | 16 |
| intercastellar | N/A | ⓘTags: Adhoc Intercastellar | JOI 2022 Final Round | Batch | 53 |
| islands | N/A | ⓘTags: Graph Theory Thousands Islands | IOI 2022 (Day 2) | Interactive | 5 |
| insects | N/A | ⓘTags: Adhoc, Binary Search, Information Theory Rarest Insects | IOI 2022 (Day 2) | Interactive | 8 |
| circuit | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Digital Circuit | IOI 2022 (Day 2) | Interactive | 14 |
| towers_ioi | N/A | ⓘTags: Binary Search, Data Structures, Greedy Radio Towers | IOI 2022 (Day 1) | Interactive | 6 |
| prison | N/A | ⓘTags: Constructive Algorithms, Divide and Conquer Prisoner Challenge | IOI 2022 (Day 1) | Interactive | 8 |
| fish | N/A | ⓘTags: Data Structures, Dynamic Programming Catfish Farm | IOI 2022 (Day 1) (oolimry) | Interactive | 14 |
| shopping_joi | N/A | ⓘTags: Binary Search, Data Structures, Divide and Conquer, Information Theory shopping_joi | JOISC 2021 | Communication | 2 |
| bodyguard | N/A | ⓘTags: Dynamic Programming bodyguard | JOISC 2021 | Batch | 7 |
| rainingseason | N/A | ⓘTags: Data Structures, Graph Theory, Trees rainingseason | Codeforces 1019E | Batch | 5 |
| minerals | N/A | ⓘTags: Information Theory minerals | JOISC 2019 | Interactive | 14 |
| computergame | N/A | ⓘTags: Binary Search, Dynamic Programming, Greedy computergame | Codeforces 1067D | Batch | 3 |
| woodenraft | N/A | ⓘTags: Greedy, Math woodenraft | Codeforces 1223G | Batch | 6 |
| doubletrip | N/A | ⓘTags: Brute Force, Constructive Algorithms, Graph Theory Double Trip | Codeforces 1343E | Batch | 29 |
| pizzeria | N/A | ⓘTags: Data Structures Pizzeria Queries | CSES | Batch | 66 |
| fever | N/A | ⓘTags: Graph Theory, Greedy fever | JOISC 2021 | Batch | 4 |
| canbashsavetheday | N/A | ⓘTags: Data Structures, Graph Theory, Trees canbashsavetheday | Codeforces 757G | Batch | 7 |
| cupboardjumps | N/A | ⓘTags: Dynamic Programming, Slope Trick cupboardjumps | Codeforces 1500F | Batch | 4 |
| colourwalk | N/A | ⓘTags: Graph Theory Colour Walk | RI-HCI Final Contest 2022 | Batch | 8 |
| markinghouses | N/A | ⓘTags: Bitmask, Dynamic Programming Marking Houses | RI-HCI Final Contest 2022 | Batch | 13 |
| bigbinarytree | N/A | ⓘTags: Greedy Big Binary Tree | RI-HCI Final Contest 2022 (bensonlzl) | Batch | 25 |
| hungryrabbits2 | N/A | ⓘTags: Data Structures Hungry Rabbits 2 | RI-HCI Final Contest 2022 (bensonlzl) | Batch | 63 |
| hungryrabbits1 | N/A | ⓘTags: Brute Force, Greedy Hungry Rabbits 1 | RI-HCI Final Contest 2022 (bensonlzl) | Batch | 145 |
| elca | N/A | ⓘTags: Data Structures, Graph Theory, Trees elca | Codeforces 482E | Batch | 5 |
| tokitsukazeandexplosion | N/A | ⓘTags: Binary Search, Greedy tokitsukazeandexplosion | Codeforces 1190E | Batch | 9 |
| cursordistance | N/A | ⓘTags: Binary Search, Math cursordistance | Codeforces 1246F | Batch | 2 |
| twoavenues | N/A | ⓘTags: Data Structures, Graph Theory, Trees twoavenues | Codeforces 1648F | Batch | 3 |
| strangedevice2 | N/A | ⓘTags: Binary Search, Graph Theory, Information Theory, Trees strangedevice2 | Codeforces 1158E | Interactive | 6 |
| oenothera | N/A | ⓘTags: Data Structures, Greedy, Square Root Decomposition oenothera | Codeforces 1039E | Batch | 6 |
| learningtrack2 | N/A | ⓘTags: Data Structures, Dynamic Programming learningtrack2 | LOJ #3068 | Batch | 6 |
| industriouslibrarian | N/A | ⓘTags: Data Structures industriouslibrarian | LOJ #2639 | Batch | 9 |
| sarenlist | N/A | ⓘTags: Bitmask, Brute Force, Graph Theory, Trees sarenlist | COCI 2021/2022 | Batch | 10 |
| beacon | N/A | ⓘTags: Dynamic Programming, Math Beacon Towers | Grand Prix of Seoul | Batch | 28 |
| cactus | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees cactus | LOJ #2250 | Batch | 9 |
| superpozicija | N/A | ⓘTags: Constructive Algorithms, Greedy superpozicija | COI 2022 | Batch | 6 |
| passes | N/A | ⓘTags: Bitmask, Brute Force, Greedy, Math passes | BOI 2022 | Batch | 11 |
| deletingnumbers | N/A | ⓘTags: Constructive Algorithms, Greedy Deleting Numbers | Grand Prix of Urals | Batch | 55 |
| preciseforecast | N/A | ⓘTags: Graph Theory preciseforecast | LOJ #3101 | Batch | 4 |
| sequence_loj | N/A | ⓘTags: Graph Theory, Greedy sequence_loj | LOJ #3158 | Batch | 3 |
| flowercards | N/A | ⓘTags: Graph Theory flowercards | LOJ #536 | Batch | 3 |
| wavynumbers | N/A | ⓘTags: Brute Force, Math, Meet in the Middle wavynumbers | Codeforces 273E | Batch | 6 |
| perishableroads | N/A | ⓘTags: Graph Theory perishableroads | Codeforces 773D | Batch | 4 |
| cakeslicing | N/A | ⓘTags: Dynamic Programming, Greedy cakeslicing | LOJ #6744 | Batch | 12 |
| gate | N/A | ⓘTags: Data Structures, Graph Theory, Trees gate | LOJ #2474 | Batch | 2 |
| greatmerge | N/A | ⓘTags: Data Structures, Graph Theory, Trees greatmerge | LOJ #2230 | Batch | 11 |
| rainbowfish | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Rainbow Fish | Mock APIO 2015 | Batch | 16 |
| treepainting | N/A | ⓘTags: Data Structures, Graph Theory, Trees treepainting | LOJ #2001 | Batch | 9 |
| kucice | N/A | ⓘTags: Line Sweep/Sliding Window kucice | COCI 2021/2022 | Batch | 7 |
| multiplechoice | N/A | ⓘTags: Data Structures, Math multiplechoice | USACO 2022 Jan, Platinum | Batch | 12 |
| constellation2 | N/A | ⓘTags: Line Sweep/Sliding Window constellation2 | JOISC 2014 | Batch | 4 |
| winetasting | N/A | ⓘTags: Data Structures winetasting | LOJ #2133 | Batch | 3 |
| earthwormlines | N/A | ⓘTags: Data Structures earthwormlines | LOJ #2303 | Batch | 4 |
| coolslogans | N/A | ⓘTags: Data Structures coolslogans | LOJ #6288 | Batch | 4 |
| spiderclimb | N/A | ⓘTags: Dynamic Programming, Trees spiderclimb | LOJ #3661 | Batch | 4 |
| tickets_loj | N/A | ⓘTags: Divide and Conquer, Dynamic Programming, Trees tickets_loj | LOJ #2249 | Batch | 5 |
| learningtrack | N/A | ⓘTags: Divide and Conquer learningtrack | LOJ #2773 | Batch | 8 |
| buildings | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window Buildings | Dunjudge Archive | Batch | 13 |
| thesis | N/A | ⓘTags: Binary Search, Dynamic Programming, Graph Theory, Trees thesis | LOJ #511 | Batch | 2 |
| paintbyrectangles | N/A | ⓘTags: Graph Theory, Line Sweep/Sliding Window paintbyrectangles | USACO 2022 Feb, Platinum | Batch | 2 |
| servers | N/A | ⓘTags: Data Structures, Divide and Conquer, Graph Theory, Trees Inside information | BOI 2021 | Batch | 13 |
| present | N/A | ⓘTags: Math present | RMI 2021 | Batch | 2 |
| nom | N/A | ⓘTags: Dynamic Programming, Math nom | RMI 2021 | Batch | 5 |
| semafor | N/A | ⓘTags: Explicitly Excluded (from IOI), Graph Theory, Math semafor | COI 2020 | Batch | 8 |
| mars | N/A | ⓘTags: Graph Theory, Information Theory Mars | APIO 2022 | Interactive | 3 |
| paint_coi | N/A | ⓘTags: Graph Theory, Square Root Decomposition paint_coi | COI 2020 | Batch | 4 |
| manymsts | N/A | ⓘTags: Binary Search, Graph Theory manymsts | LOJ #3635 | Batch | 2 |
| souvenirs | N/A | ⓘTags: Data Structures souvenirs | Codeforces 765F | Batch | 12 |
| packaging | N/A | ⓘTags: Data Structures, Greedy, Math Packaging | Codeforces 1690E | Batch | 61 |
| pastiri | N/A | ⓘTags: Graph Theory, Greedy, Trees pastiri | COI 2019/2020 | Batch | 13 |
| edgeremove | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees edgeremove | LOJ #3705 | Batch | 3 |
| redistributinggifts | N/A | ⓘTags: Bitmask, Dynamic Programming redistributinggifts | USACO 2022 Feb Gold | Batch | 14 |
| travelling | N/A | ⓘTags: Math travelling | ASEAN Sparring 2022 (kevinsogo) | Batch | 4 |
| wabot2 | N/A | ⓘTags: Constructive Algorithms, Data Structures, Greedy wabot2 | ASEAN Sparring 2022 (bensonlzl) | Batch | 12 |
| kmxorm | N/A | ⓘTags: Bitmask, Math, Meet in the Middle kmxorm | ASEAN Sparring 2022 (zscoder) | Batch | 12 |
| events | N/A | ⓘTags: Data Structures, Greedy events | BOI 2022 | Batch | 17 |
| arrangement | N/A | ⓘTags: Data Structures, Dynamic Programming, Greedy arrangement | LOJ #3327 | Batch | 3 |
| seqtransform | N/A | ⓘTags: Brute Force, Data Structures, Greedy seqtransform | LOJ #3704 | Batch | 6 |
| smokeflower | N/A | ⓘTags: Data Structures, Divide and Conquer, Line Sweep/Sliding Window smokeflower | Classic Problem | Batch | 20 |
| zhylanio | N/A | ⓘTags: Binary Search, Brute Force, Data Structures zhylanio | IZHO 2022 | Batch | 8 |
| index | N/A | ⓘTags: Binary Search, Data Structures index | COCI 2020/2021 Contest 6 | Batch | 35 |
| urbanplanning | N/A | ⓘTags: Graph Theory, Trees urbanplanning | IZhO 2022 | Batch | 4 |
| island_boi | N/A | ⓘTags: Graph Theory, Greedy, Trees island | BOI 2022 | Batch | 23 |
| watchmen | N/A | ⓘTags: Graph Theory watchmen | BOI 2021 | Batch | 2 |
| vault | N/A | ⓘTags: Dynamic Programming, Greedy vault | BOI 2022 | Batch | 10 |
| countinghaybales | N/A | ⓘTags: Dynamic Programming countinghaybales | USACO 2022 Jan, Platinum | Batch | 14 |
| phonenumbers | N/A | ⓘTags: Bitmask, Dynamic Programming phonenumbers | USACO 2022 Feb, Platinum | Batch | 4 |
| perm | N/A | ⓘTags: Constructive Algorithms Permutation | APIO 2022 | Interactive | 8 |
| game | N/A | ⓘTags: Graph Theory Game | APIO 2022 | Interactive | 4 |
| prize | N/A | ⓘTags: Binary Search, Information Theory The Big Prize | IOI 2017 | Interactive | 7 |
| bingo | N/A | ⓘTags: Adhoc, Constructive Algorithms Bingo | Grand Prix of Daejeon | Batch | 51 |
| sculptures_apio15 | N/A | ⓘTags: Bitmask, Dynamic Programming Bali Sculptures | APIO 2015 | Batch | 19 |
| train_ioi | N/A | ⓘTags: Graph Theory Toy Train | IOI 2017 | Interactive | 4 |
| wiring_ioi | N/A | ⓘTags: Dynamic Programming Wiring | IOI 2017 | Interactive | 7 |
| gap | N/A | ⓘTags: Information Theory, Math Gap | APIO 2016 | Interactive | 34 |
| boat | N/A | ⓘTags: Dynamic Programming, Math Boat | APIO 2016 | Batch | 9 |
| koala | N/A | ⓘTags: Binary Search, Constructive Algorithms, Divide and Conquer, Information Theory Koala Game | APIO 2017 | Interactive | 3 |
| rainbow | N/A | ⓘTags: Data Structures, Graph Theory, Math Land of the Rainbow Gold | APIO 2017 | Interactive | 9 |
| alien10 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math alien10 | uwu (errorgorn) | Batch | 4 |
| tomskitchen | N/A | ⓘTags: Dynamic Programming Tom’s Kitchen | BOI 2019 Day 2 | Batch | 4 |
| visiting | N/A | ⓘTags: Graph Theory, Trees visiting | Dunjudge Archive | Batch | 7 |
| coingame | N/A | ⓘTags: Adhoc, Explicitly Excluded (from IOI) coingame | NTST 2015 | Batch | 23 |
| funnynim | N/A | ⓘTags: Explicitly Excluded (from IOI), Math funnynim | IMO Shortlist 2015 | Batch | 29 |
| neila | N/A | ⓘTags: Adhoc, Math neila | RMM 2013/5 | Batch | 5 |
| osumnjiceni | N/A | ⓘTags: Data Structures, Greedy, Trees Osumnjičeni | COCI 2021/2022 | Batch | 20 |
| alien9 | N/A | ⓘTags: Adhoc, Dynamic Programming, Math alien9 | IMO Shortlist 1996 | Batch | 12 |
| streetlamps_ex | N/A | ⓘTags: Data Structures, Divide and Conquer Street Lamps!! | APIO 2019 but with more pain (zaneyu) | Batch | 3 |
| alice | N/A | ⓘTags: Graph Theory, Information Theory Alice | IMO Shortlist 2019 | Interactive | 9 |
| factories | N/A | ⓘTags: Data Structures, Divide and Conquer, Graph Theory, Trees factories | JOI 2014 Open | Interactive | 31 |
| firecracker | N/A | ⓘTags: Data Structures, Greedy firecracker | CNY Contest 2019 | Batch | 34 |
| bananadance | N/A | ⓘTags: Math bananadance | Dunjudge Archive | Batch | 6 |
| sumo | N/A | ⓘTags: Binary Search, Graph Theory sumo | COCI 2013/2014 | Batch | 15 |
| election_joi | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Election Campaign | JOI Open 2015 | Batch | 7 |
| valley | N/A | ⓘTags: Divide and Conquer, Graph Theory, Trees Alpine valley | BOI 2019 Day 1 | Batch | 18 |
| binaryseq | N/A | ⓘTags: Math BinarySeq | Dunjudge Archive (bensonlzl) | Batch | 4 |
| kusac | N/A | ⓘTags: Math, Syntax kusac | COCI 2013/2014 | Batch | 46 |
| gathering | N/A | ⓘTags: Graph Theory, Greedy gathering | USACO 2018 December Platinum | Batch | 3 |
| ples | N/A | ⓘTags: Greedy ples | COCI 2011/2012 | Batch | 8 |
| convention | N/A | ⓘTags: Binary Search, Greedy convention | USACO 2018 December Silver | Batch | 21 |
| sequence | N/A | ⓘTags: Adhoc, Greedy sequence | AtCoder | Batch | 10 |
| iqtest2 | N/A | ⓘTags: Math iqtest2 | April Fools' 2022 (errorgorn) | Batch | 58 |
| kronican | N/A | ⓘTags: Bitmask, Dynamic Programming kronican | COCI 2016/2017 | Batch | 10 |
| maxmex | N/A | ⓘTags: Data Structures, Graph Theory, Trees Max Mex | Dunjudge Archive | Batch | 3 |
| paleta | N/A | ⓘTags: Dynamic Programming, Graph Theory, Math paleta | COCI 2013/2014 | Batch | 4 |
| closedpath | N/A | ⓘTags: Graph Theory, Trees closedpath | Dunjudge Archive | Batch | 73 |
| mountain | N/A | ⓘTags: Data Structures Mountain | IOI 2005 | Batch | 35 |
| papplesort | N/A | ⓘTags: Data Structures papplesort | Dunjudge Archive | Batch | 7 |
| camels | N/A | ⓘTags: Data Structures Guessing Camels | NWERC 2015 | Batch | 25 |
| flowering | N/A | ⓘTags: Data Structures flowering | COCI 2008/2009 | Batch | 21 |
| inversionsum | N/A | ⓘTags: Dynamic Programming, Math inversionsum | Dunjudge Archive | Batch | 4 |
| rabbitradar | N/A | ⓘTags: Data Structures, Dynamic Programming rabbitradar | Dunjudge Archive (bensonlzl) | Batch | 8 |
| manhattancompass | N/A | ⓘTags: Binary Search, Graph Theory manhattancompass | AtCoder | Batch | 5 |
| graph | N/A | ⓘTags: Graph Theory, Greedy, Trees graph | Dunjudge Archive | Batch | 36 |
| decayedbridges | N/A | ⓘTags: Graph Theory decayedbridges | ABC 120D | Batch | 79 |
| goodseq | N/A | ⓘTags: Data Structures goodseq | Dunjudge Archive | Batch | 217 |
| ballsofbuma | N/A | ⓘTags: Adhoc Balls of Buma | Dunjudge Archive | Batch | 14 |
| ispit | N/A | ⓘTags: Adhoc ispit | COCI 2018/2019 | Batch | 10 |
| mathtest | N/A | ⓘTags: Math, Syntax mathtest | Dunjudge Archive | Batch | 34 |
| network2 | N/A | ⓘTags: Data Structures, Graph Theory, Trees network | Dunjudge Archive | Batch | 13 |
| repairs | N/A | ⓘTags: Data Structures, Graph Theory, Trees repairs | Dunjudge Archive | Batch | 26 |
| grassplant | N/A | ⓘTags: Data Structures, Graph Theory, Trees Grass Planting | Dunjudge Archive | Batch | 77 |
| cowland | N/A | ⓘTags: Data Structures, Graph Theory, Trees Cow Land | USACO 2019 February Contest, Gold | Batch | 54 |
| foodchain | N/A | ⓘTags: Math, Syntax Food Chain | Dec Trg 2019 (Elementary) | Batch | 713 |
| rating | N/A | ⓘTags: Adhoc, Math Rating Changes | Dec Trg 2019 (Elementary) | Batch | 30 |
| cross | N/A | ⓘTags: Dynamic Programming Cross | Dunjudge Archive | Batch | 9 |
| trespasser | N/A | ⓘTags: Bitmask, Information Theory ADVANCED Trespasser | 2019 IOI Problem Setter Contest (bensonlzl) | Interactive | 3 |
| enumeratingbrackets | N/A | ⓘTags: Dynamic Programming Enumerating Brackets | Waterloo Programming Contest 2016-10-01 | Batch | 5 |
| fruits_noi | N/A | ⓘTags: Data Structures, Dynamic Programming Fruits | NOI 2022 Finals (bensonlzl) | Batch | 6 |
| grapevine | N/A | ⓘTags: Data Structures, Divide and Conquer, Graph Theory, Trees Grapevine | NOI 2022 Finals (huajun, jeff_) | Batch | 20 |
| towers_noi | N/A | ⓘTags: Constructive Algorithms, Data Structures, Greedy Towers | NOI 2022 Finals (ngyupeng6) | Batch | 25 |
| gymbadges | N/A | ⓘTags: Dynamic Programming, Greedy Gym Badges | NOI 2022 Finals (huajun) | Batch | 104 |
| votingcities | N/A | ⓘTags: Bitmask, Graph Theory Voting Cities | NOI 2022 Finals | Batch | 97 |
| rarkids | N/A | ⓘTags: Constructive Algorithms, Math rarkids | IOI Sparring 2018 SGP | Interactive | 8 |
| hanabi | N/A | ⓘTags: Binary Search, Data Structures hanabi | IOI Sparring 2018 SGP | Batch | 4 |
| weddingcity | N/A | ⓘTags: Constructive Algorithms, Graph Theory weddingcity | IOI Sparring 2018 SGP | Batch | 6 |
| wheelofmisfortune | N/A | ⓘTags: Adhoc, Brute Force, Math Wheel of Misfortune | IOI 2020 Practice Session | Batch | 3 |
| cakeatstake | N/A | ⓘTags: Data Structures Cake at Stake | IOI 2020 Practice Session | Batch | 5 |
| triumvirate | N/A | ⓘTags: Dynamic Programming Triumvirate | IOI 2020 Practice Session | Batch | 5 |
| cellulardata | N/A | ⓘTags: Bitmask, Dynamic Programming, Explicitly Excluded (from IOI), Math Cellular Data | IOI 2020 Practice Session | Batch | 5 |
| trackingtraining | N/A | ⓘTags: Graph Theory, Math Tracking Training | IOI 2020 Practice Session | Batch | 7 |
| goneviral | N/A | ⓘTags: Binary Search, Graph Theory Gone Viral | IOI 2020 Practice Session | Batch | 12 |
| wakeup | N/A | ⓘTags: Binary Search, Data Structures Wake Up | IOI 2020 Practice Session | Batch | 6 |
| wearenumberone | N/A | ⓘTags: Graph Theory We Are Number One | IOI 2020 Practice Session | Batch | 4 |
| powerpoints | N/A | ⓘTags: Constructive Algorithms Power Points | IOI 2020 Practice Session | Batch | 4 |
| idigit | N/A | ⓘTags: Bitmask, Math I Dig It! | IOI 2020 Practice Session | Batch | 6 |
| styles | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming Styles | IOI 2020 Practice Session | Batch | 10 |
| synergies | N/A | ⓘTags: Constructive Algorithms, Graph Theory Synergies | IOI 2020 Practice Session | Batch | 4 |
| supermarkets | N/A | ⓘTags: Data Structures Supermarkets | IOI 2020 Practice Session | Batch | 5 |
| filibuster | N/A | ⓘTags: Data Structures Filibuster | IOI 2020 Practice Session | Batch | 4 |
| firing | N/A | ⓘTags: Data Structures Firing | IOI 2020 Practice Session | Batch | 4 |
| figures | N/A | ⓘTags: Binary Search, Dynamic Programming Figures | IOI 2020 Practice Session | Batch | 5 |
| banks | N/A | ⓘTags: Graph Theory Banks | IOI 2020 Practice Session | Batch | 15 |
| generosity | N/A | ⓘTags: Joke Generosity | April Fools' 2022 (oolimry) | Batch | 340 |
| alphabrackets | N/A | ⓘTags: Data Structures, Dynamic Programming alphabrackets | Dec Course Final Contest 2017 | Batch | 13 |
| luckynumbers2 | N/A | ⓘTags: Math luckynumbers2 | Dec Course Final Contest 2017 | Batch | 89 |
| cattown | N/A | ⓘTags: Graph Theory Cat Town | RI/RJC NOI Selection Test 2016 | Batch | 2 |
| trekking | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory Jungle Trekking | HCI NOI Selection Test 2017 | Batch | 14 |
| builderswand | N/A | ⓘTags: Dynamic Programming Builder’s Wand | HCI NOI Selection Test 2017 | Batch | 3 |
| mooshroomfarm | N/A | ⓘTags: Data Structures Mooshroom Farm | HCI NOI Selection Test 2017 | Batch | 2 |
| redstonelamps | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Redstone Lamps | HCI NOI Selection Test 2017 | Batch | 4 |
| trianglecraft | N/A | ⓘTags: Math Trianglecraft | HCI NOI Selection Test 2017 | Batch | 4 |
| hop | N/A | ⓘTags: Math hop | COCI 2020/2021 Contest #4 Problem 3 | Batch | 15 |
| dinnerbox | N/A | ⓘTags: Dynamic Programming, Greedy Jianzhi’s Dinner Box | RI NOI Selection Test 2017 | Batch | 11 |
| lost | N/A | ⓘTags: Bitmask, Information Theory Jianzhi’s Lost | RI NOI Selection Test 2017 | Interactive | 6 |
| clipboard | N/A | ⓘTags: Adhoc, Data Structures Jianzhi’s Clipboard Sorting | RI NOI Selection Test 2017 | Batch | 10 |
| mushroomfarm | N/A | ⓘTags: Binary Search, Dynamic Programming Jianzhi’s Mushroom Farm | RI NOI Selection Test 2017 | Batch | 47 |
| spiraldance | N/A | ⓘTags: Adhoc, Math Estelle’s Spiral Dance | RI-HCI NOI Selection Test 2018 | Batch | 14 |
| spotlights | N/A | ⓘTags: Adhoc Estelle’s Concert Spotlights | RI-HCI NOI Selection Test 2018 | Batch | 6 |
| superfanclub | N/A | ⓘTags: Graph Theory, Trees Estelle’s Super Fan Club | RI-HCI NOI Selection Test 2018 | Interactive | 7 |
| stagegames_part2 | N/A | ⓘTags: Adhoc, Information Theory Estelle’s Stage Games (Subtasks 6 - 10) | RI-HCI NOI Selection Test 2018 | Interactive | 3 |
| stagegames_part1 | N/A | ⓘTags: Adhoc, Information Theory Estelle’s Stage Games (Subtasks 1 - 5) | RI-HCI NOI Selection Test 2018 | Interactive | 5 |
| rookable | N/A | ⓘTags: Graph Theory Rookable | NUSH NOI Selection Test 2018 | Batch | 8 |
| crab | N/A | ⓘTags: Bitmask, Dynamic Programming Crab | NUSH NOI Selection Test 2018 | Batch | 16 |
| secret_mco | N/A | ⓘTags: Adhoc, Explicitly Excluded (from IOI) Secret | MCO 2015 | Batch | 6 |
| penghulu | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Penghulu | MCO 2016 | Batch | 36 |
| chefmala | N/A | ⓘTags: Data Structures chefmala | CodeChef February Lunchtime 2022 (errorgorn) | Batch | 2 |
| centroid | N/A | ⓘTags: Brute Force, Graph Theory Centroid | Dunjudge Archive | Batch | 24 |
| forkintheroad | N/A | ⓘTags: Dynamic Programming, Graph Theory, Math forkintheroad | AtCoder | Batch | 5 |
| shortest | N/A | ⓘTags: Explicitly Excluded (from IOI), Math shortest | Dunjudge Archive | Batch | 89 |
| harvest | N/A | ⓘTags: Data Structures Harvest | JOI 2019/2020 | Batch | 4 |
| cantor_ex | N/A | ⓘTags: Binary Search, Information Theory cantor_ex | Valentine's Day Contest 2022 (errorgorn) | Interactive | 3 |
| cantor | N/A | ⓘTags: Binary Search, Information Theory cantor | TROC 24 (errorgorn) | Interactive | 4 |
| killanton_ex | N/A | ⓘTags: Bitmask, Dynamic Programming killanton_ex | Valentine's Day Contest 2022 (errorgorn) | Batch | 4 |
| kronecker | N/A | ⓘTags: Math kronecker | Valentine's Day Contest 2022 (errorgorn) | Batch | 2 |
| lboard | N/A | ⓘTags: Brute Force, Dynamic Programming L-Board | NOI 2022 Qualification | Batch | 208 |
| dragonfly | N/A | ⓘTags: Data Structures, Graph Theory, Trees dragonfly | NOI 2022 Qualification (bensonlzl) | Batch | 30 |
| treecutting | N/A | ⓘTags: Brute Force, Graph Theory, Trees Tree Cutting | NOI 2022 Qualification | Batch | 92 |
| usefft3 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 3 | Valentine's Day Contest 2022 (errorgorn) | Batch | 3 |
| iqtest | N/A | ⓘTags: Math iqtest | Valentine's Day Contest 2022 (errorgorn) | Batch | 106 |
| usefft1 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 1 | Classic Problem | Batch | 14 |
| stoningame | N/A | ⓘTags: Math stoningame | Valentine's Day Contest 2022 (maomao90) | Batch | 17 |
| permutationswap | N/A | ⓘTags: Adhoc permutationswap | Valentine's Day Contest 2022 (maomao90) | Batch | 12 |
| usefft2 | N/A | ⓘTags: Math Use FFT 2 | Valentine's Day Contest 2022 (errorgorn) | Batch | 3 |
| pandasoldiers | N/A | ⓘTags: Adhoc, Data Structures Soldiers | Dunjudge Archive | Batch | 13 |
| rabbitgifts | N/A | ⓘTags: Data Structures, Math rabbitgifts | December Course 2018 Advanced Final Contest | Batch | 5 |
| rabbitmeeting | N/A | ⓘTags: Adhoc, Greedy RabbitMeeting | December Course 2018 Advanced Final Contest | Batch | 44 |
| taxes | N/A | ⓘTags: Data Structures, Dynamic Programming, Square Root Decomposition taxes | December Course 2018 Advanced Final Contest, ROI 2018 Day 1 | Batch | 9 |
| couples | N/A | ⓘTags: Dynamic Programming couples | December Course 2018 Advanced Final Contest | Batch | 28 |
| addsubtract | N/A | ⓘTags: Dynamic Programming, Greedy addsubtract | Dunjudge Archive | Batch | 7 |
| deda | N/A | ⓘTags: Binary Search, Data Structures deda | COCI 2017/2018 | Batch | 59 |
| snakecode | N/A | ⓘTags: Dynamic Programming snakecode | Dunjudge Archive | Interactive | 13 |
| colour | N/A | ⓘTags: Data Structures colour | December Course 2018 Elementary Final Contest | Batch | 25 |
| bunchlocks | N/A | ⓘTags: Graph Theory bunchlocks | Dunjudge Archive | Batch | 8 |
| dateornot | N/A | ⓘTags: Binary Search, Information Theory Date Or Not? | Dunjudge Archive | Interactive | 7 |
| thunderstorm | N/A | ⓘTags: Data Structures, Greedy Thunderstorm | Dec Trg 2019 (Elementary) | Batch | 15 |
| multiple | N/A | ⓘTags: Graph Theory multiple | Dunjudge Archive | Batch | 31 |
| globalwarming_ex | N/A | ⓘTags: Data Structures, Graph Theory globalwarming_ex | Dunjudge Archive | Batch | 17 |
| climatechange | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming climatechange | Dunjudge Archive | Batch | 14 |
| notebook | N/A | ⓘTags: Graph Theory notebook | Dunjudge Archive | Batch | 14 |
| ratar | N/A | ⓘTags: Binary Search, Brute Force, Data Structures, Dynamic Programming, Line Sweep/Sliding Window ratar | COCI 2013/2014 | Batch | 10 |
| morepaths | N/A | ⓘTags: Dynamic Programming morepaths | Dunjudge Archive | Batch | 12 |
| dquery | N/A | ⓘTags: Data Structures, Square Root Decomposition dquery | Classic Problem | Batch | 95 |
| hipercijevi | N/A | ⓘTags: Graph Theory hipercijevi | COCI 2012/2013 | Batch | 38 |
| math | N/A | ⓘTags: Brute Force, Math Primes Up | April Fools Contest 2020 (shenxy13) | Batch | 21 |
| 4cuts | N/A | ⓘTags: Adhoc, Brute Force 4cuts | Dunjudge Archive | Batch | 12 |
| robot2 | N/A | ⓘTags: Adhoc, Binary Search, Line Sweep/Sliding Window robot2 | Dunjudge Archive | Batch | 13 |
| joke | N/A | ⓘTags: Graph Theory Joke | Dec Trg 2019 (Elementary) | Batch | 35 |
| nutritionist | N/A | ⓘTags: Data Structures nutritionist | Dunjudge Archive | Batch | 12 |
| bore | N/A | ⓘTags: Brute Force Boring | Dunjudge Archive | Batch | 7 |
| subwaytrip | N/A | ⓘTags: Graph Theory subwaytrip | Dunjudge Archive | Batch | 20 |
| compact | N/A | ⓘTags: Data Structures, Dynamic Programming compact | Dunjudge Archive | Batch | 14 |
| trianglesum | N/A | ⓘTags: Brute Force, Dynamic Programming trianglesum | NOI 2010 Selection Test | Batch | 12 |
| mrbeancurd | N/A | ⓘTags: Dynamic Programming mrbeancurd | HCI Be A Problem Setter (BAPS) Contest 2017 (jzh, caffeine) | Batch | 18 |
| walk | N/A | ⓘTags: Graph Theory Sky Walking | IOI 2019 | Interactive | 5 |
| vision | N/A | ⓘTags: Adhoc, Constructive Algorithms, Information Theory Vision Program | IOI 2019 | Interactive | 9 |
| rect | N/A | ⓘTags: Brute Force, Data Structures Rectangle | IOI 2019 (Day 1) | Interactive | 7 |
| shoes | N/A | ⓘTags: Data Structures, Greedy Arranging Shoes | IOI 2019 (Day 1) | Interactive | 43 |
| planning | N/A | ⓘTags: Graph Theory, Greedy, Trees Company Planning | TOKI Open 2014 | Batch | 23 |
| prisoners | N/A | ⓘTags: Adhoc, Graph Theory, Information Theory prisoners | APIO 2014 Mock Contest | Communication | 23 |
| inequality3 | N/A | ⓘTags: Data Structures Social Inequality | TOKI Open 2014 | Batch | 13 |
| rolling | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Rolling | Dunjudge Archive | Batch | 34 |
| triusis | N/A | ⓘTags: Data Structures, Dynamic Programming Rabbit Carrot | Lithuanian Olympiad in Informatics 2019 | Batch | 43 |
| secret | N/A | ⓘTags: Divide and Conquer, Information Theory Secret | JOI Open 2014 | Interactive | 26 |
| grazing | N/A | ⓘTags: Bitmask, Brute Force, Graph Theory grazing | USACO Bronze Jan 2012 | Batch | 12 |
| wallisstop | N/A | ⓘTags: Binary Search, Data Structures, Graph Theory Wall Is Stop | Dunjudge Archive (bensonlzl) | Batch | 10 |
| youngmaids | N/A | ⓘTags: Data Structures youngmaids | Dunjudge Archive | Batch | 21 |
| toy | N/A | ⓘTags: Graph Theory, Trees toy | ROI 2014 | Batch | 5 |
| stations | N/A | ⓘTags: Graph Theory, Information Theory, Trees Stations | IOI 2020 (Day 2) | Communication | 18 |
| 3dhistogram | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming 3D Histogram | COCI 2020 | Batch | 9 |
| outing | N/A | ⓘTags: Data Structures Outing | Educational Round 10 (Goodbye cstuart and kai824) (kai824) | Batch | 24 |
| devil | N/A | ⓘTags: Constructive Algorithms, Graph Theory The Devil's Algorithm | Hello 2022 (errorgorn) | Batch | 9 |
| prefixsums2 | N/A | ⓘTags: Math Prefix Sums 2 | Educational Round 10 (Goodbye cstuart and kai824) (errorgorn) | Batch | 8 |
| qualitycontrol | N/A | ⓘTags: Graph Theory, Trees Quality Control | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Batch | 10 |
| inequality2 | N/A | ⓘTags: Adhoc, Constructive Algorithms inequality2 | Dec Course 2021 BAPS (zaneyu) | Batch | 17 |
| prefixgcd | N/A | ⓘTags: Adhoc, Brute Force, Math prefixgcd | Dec Course 2021 BAPS (jiahng) | Batch | 34 |
| eexploration | N/A | ⓘTags: Graph Theory Elementary Exploration | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 41 |
| eeducation | N/A | ⓘTags: Syntax Elementary Education | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 385 |
| eevacuation | N/A | ⓘTags: Dynamic Programming, Graph Theory Elementary Evacuation | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 131 |
| eescapism | N/A | ⓘTags: Adhoc, Math Elementary Escapism | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 219 |
| eelimination | N/A | ⓘTags: Data Structures Elementary Elimination | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 291 |
| dice | N/A | ⓘTags: Math Dice | Dec Course 2021 BAPS (origami100, dillion) | Batch | 38 |
| openingshop | N/A | ⓘTags: Greedy Opening Shop | Dec Course 2021 BAPS (Halogen) | Batch | 25 |
| gerrymandering | N/A | ⓘTags: Dynamic Programming Gerrymandering | Dec Course 2021 BAPS (beepbeepsheep) | Batch | 44 |
| bitaro | N/A | ⓘTags: Dynamic Programming, Graph Theory, Square Root Decomposition Bitaro's Party | JOI 2017/2018 Spring Camp | Batch | 15 |
| triangles | N/A | ⓘTags: Graph Theory, Square Root Decomposition Counting Triangles | Classic Problem | Batch | 36 |
| more_lca2 | N/A | ⓘTags: Graph Theory, Trees More LCA 2 | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Interactive | 19 |
| selfpermutation | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming selfpermutation | TOKI KSN Day 2 | Batch | 22 |
| linearbasis | N/A | ⓘTags: Explicitly Excluded (from IOI), Math linearbasis | Hello 2022 (errorgorn) | Batch | 5 |
| frog3 | N/A | ⓘTags: Dynamic Programming Frog 3 | Atcoder Educational DP Contest | Batch | 71 |
| rabbitbars | N/A | ⓘTags: Binary Search, Data Structures, Divide and Conquer, Dynamic Programming rabbitbars | Dunjudge Archive (bensonlzl) | Batch | 37 |
| queuestack | N/A | ⓘTags: Adhoc, Data Structures Queuestack | Educational Round 10 (Goodbye cstuart and kai824) (lida, oolimry, cstuart) | Batch | 9 |
| addition2 | N/A | ⓘTags: Joke Addition? | Hello 2022 (oolimry) | Batch | 694 |
| helloworld2 | N/A | ⓘTags: Joke Hello World? | Hello 2022 (jamessng) | Batch | 323 |
| fiboregisters | N/A | ⓘTags: Adhoc, Constructive Algorithms, Math IOI Registers: but epic | TROC 24 (errorgorn) | Batch | 4 |
| shopping | N/A | ⓘTags: Dynamic Programming Shopping | Dunjudge Archive | Batch | 12 |
| pawns | N/A | ⓘTags: Adhoc, Explicitly Excluded (from IOI), Math e4e5 Ke2? Ke7? | TROC 24 (maomao90, errorgorn) | Batch | 4 |
| ninjashard | N/A | ⓘTags: Data Structures Ninjas (Hard) | TROC 24 (oolimry, errorgorn) | Batch | 3 |
| ninjaseasy | N/A | ⓘTags: Data Structures Ninjas (Easy) | TROC 24 (oolimry) | Batch | 3 |
| ktupleflip | N/A | ⓘTags: Adhoc, Greedy K-tuple Flip | TROC 24 (errorgorn) | Batch | 10 |
| doubleflip | N/A | ⓘTags: Adhoc Double Flip | TROC 24 (errorgorn) | Batch | 39 |
| singleflip | N/A | ⓘTags: Syntax Single Flip | TROC 24 (maomao90) | Batch | 95 |
| newlottery | N/A | ⓘTags: Dynamic Programming New Lottery | Google Code Jam 2014 | Batch | 7 |
| domine | N/A | ⓘTags: Bitmask, Dynamic Programming domine | COCI 2013/2014 | Batch | 18 |
| boxoffice | N/A | ⓘTags: Brute Force, Data Structures Box Office | Dunjudge Archive | Batch | 5 |
| more_lca | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees More LCA | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Interactive | 25 |
| weightedguess | N/A | ⓘTags: Dynamic Programming Weighted Guess | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Interactive | 19 |
| power | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees power | JOI | Batch | 24 |
| mergers | N/A | ⓘTags: Adhoc, Data Structures, Graph Theory, Trees mergers | JOI | Batch | 20 |
| wandering | N/A | ⓘTags: Data Structures, Graph Theory, Trees wandering | AGC 029 | Batch | 11 |
| hoofpaperscissor | N/A | ⓘTags: Dynamic Programming Hoof, Paper, Scissors | USACO 2017 January Contest, Gold | Batch | 84 |
| grid | N/A | ⓘTags: Dynamic Programming Grid | Atcoder Educational DP Contest | Batch | 189 |
| pythonindentation | N/A | ⓘTags: Dynamic Programming pythonindentation | Codeforces 909C | Batch | 58 |
| straight | N/A | ⓘTags: Bitmask, Dynamic Programming Pure Straight | ARC 126 | Batch | 15 |
| digitsum | N/A | ⓘTags: Dynamic Programming digitsum | UOJ Easy Round #4 | Batch | 16 |
| peddler | N/A | ⓘTags: Dynamic Programming, Graph Theory Peddler | ABC 188 | Batch | 88 |
| bank | N/A | ⓘTags: Bitmask, Dynamic Programming Bank | IZhO 2014 Day 1 | Batch | 53 |
| 01knapsack | N/A | ⓘTags: Dynamic Programming 0-1 Knapsack | Classic problem (Atcoder Educational DP Contest) | Batch | 438 |
| voting | N/A | ⓘTags: Data Structures, Greedy Voting | Educational Codeforces Round 75 E | Batch | 17 |
| leave | N/A | ⓘTags: Data Structures leave | Dunjudge Archive | Batch | 152 |
| guessqueue | N/A | ⓘTags: Brute Force, Data Structures Guess the Queue | Kattis (modified) (ryangohca) | Batch | 119 |
| woodcutter | N/A | ⓘTags: Brute Force, Data Structures Woodcutter | Codeforces 527C (modified) | Interactive | 41 |
| sandwich | N/A | ⓘTags: Divide and Conquer Sandwich | HCI-NUSH NOI Selection 2022 (errorgorn, oolimry, yanhao) | Batch | 8 |
| battleship | N/A | ⓘTags: Bitmask, Constructive Algorithms, Divide and Conquer Battleship | HCI-NUSH NOI Selection 2022 (errorgorn) | Interactive | 23 |
| jumper | N/A | ⓘTags: Brute Force, Data Structures, Line Sweep/Sliding Window Manhattan Jumper | HCI-NUSH NOI Selection 2022 (errorgorn) | Batch | 23 |
| boundedpermutation | N/A | ⓘTags: Adhoc, Dynamic Programming, Math Bounded Permutation | HCI-NUSH NOI Selection 2022 (maomao90) | Batch | 70 |
| flappyrabbit | N/A | ⓘTags: Greedy Flappy Rabbit | HCI-NUSH NOI Selection 2022 (pavement) | Interactive | 101 |
| 727 | N/A | ⓘTags: Greedy, Math 727 | HCI-NUSH NOI Selection 2022 (errorgorn) | Batch | 133 |
| uniquepath | N/A | ⓘTags: Graph Theory uniquepath | AGC 38D | Batch | 19 |
| spy | N/A | ⓘTags: Data Structures, Graph Theory, Trees spy | 2013 IOI Japan National Team Selection Test Day 2 | Batch | 28 |
| redblue | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Trees redblue | Dunjudge Archive | Batch | 6 |
| bosses | N/A | ⓘTags: Brute Force, Graph Theory, Greedy, Trees bosses | BOI 2016 | Batch | 73 |
| roots | N/A | ⓘTags: Data Structures, Graph Theory, Trees roots | Codeforces 695E | Batch | 24 |
| typicalstairs | N/A | ⓘTags: Dynamic Programming Typical Stairs | ABC 129 | Batch | 344 |
| vainish | N/A | ⓘTags: Dynamic Programming Vanish | 2015-2016 NOI Training Diagnostic Test | Batch | 106 |
| postcard | N/A | ⓘTags: Dynamic Programming postcard | Codeforces 4D | Batch | 58 |
| duckwalk | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming duckwalk | Codeforces 76F | Batch | 23 |
| selfdefence | N/A | ⓘTags: Dynamic Programming Self Defence | TOKI KSN Day 1 | Batch | 16 |
| deque | N/A | ⓘTags: Dynamic Programming Deque | AtCoder Educational DP Contest | Batch | 114 |
| partitiongame | N/A | ⓘTags: Data Structures, Dynamic Programming Partition Game | Codeforces 1527E | Batch | 38 |
| stringsofimpurity | N/A | ⓘTags: Binary Search stringsofimpurity | AtCoder | Batch | 52 |
| logs | N/A | ⓘTags: Binary Search logs | AtCoder | Batch | 171 |
| snukethewizard | N/A | ⓘTags: Adhoc, Binary Search snukethewizard | AtCoder | Batch | 18 |
| library | N/A | ⓘTags: Binary Search, Information Theory Library | JOI 2018/2019 Spring Camp Day 4 | Interactive | 2 |
| potatoqueue | N/A | ⓘTags: Data Structures potatoqueue | Dunjudge Archive | Interactive | 27 |
| minstack | N/A | ⓘTags: Data Structures minstack | Dunjudge Archive | Interactive | 270 |
| knapsack2 | N/A | ⓘTags: Dynamic Programming knapsack2 | David Pisinger (1995) | Batch | 4 |
| wiring | N/A | ⓘTags: Adhoc, Constructive Algorithms, Greedy Fix Wiring | Polish Collegiate Programming Contest 2021 | Batch | 14 |
| stickytape | N/A | ⓘTags: Greedy Sticky Tape | Classic Problem | Batch | 122 |
| cp2booksales | N/A | ⓘTags: Line Sweep/Sliding Window cp2booksales | Dunjudge Archive | Batch | 25 |
| sale | N/A | ⓘTags: Data Structures, Greedy sale | Dunjudge Archive | Batch | 15 |
| brackets | N/A | ⓘTags: Greedy, Slope Trick Bracket Subsequence | Classic Problem (zengminghao) | Batch | 63 |
| travel | N/A | ⓘTags: Greedy Travel | CCO 2015 | Batch | 81 |
| relutree | N/A | ⓘTags: Data Structures relutree | Classic Problem (errorgorn) | Batch | 9 |
| hacking | N/A | ⓘTags: Graph Theory Hacking | Classic problem (fyss006) | Batch | 97 |
| hamster1 | N/A | ⓘTags: Dynamic Programming Hamster's Journey | Atcoder Educational DP Contest | Batch | 283 |
| fractions | N/A | ⓘTags: Syntax fractions | Classic Problem (YeoBL20) | Batch | 247 |
| medianstring | N/A | ⓘTags: Syntax medianstring | Dunjudge Archive | Batch | 658 |
| descsort | N/A | ⓘTags: Syntax descsort | Dunjudge Archive | Batch | 1031 |
| xortree | N/A | ⓘTags: Data Structures xortree | Classic Problem (errorgorn) | Batch | 24 |
| fibotree | N/A | ⓘTags: Data Structures, Explicitly Excluded (from IOI), Math fibotree | Bubble Cup 14 (modified) | Batch | 11 |
| stackweights | N/A | ⓘTags: Data Structures stackweights | CSES Problem Set | Batch | 57 |
| synchronization | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Synchronization | JOI Open Contest 2013 | Batch | 7 |
| rectangleoutline | N/A | ⓘTags: Dynamic Programming, Line Sweep/Sliding Window Rectangle Outline | USACO 2016 January Contest, Platinum | Batch | 64 |
| picnic | N/A | ⓘTags: Binary Search, Greedy Picnic | Codeforces Global Round 17 | Batch | 100 |
| management | N/A | ⓘTags: Syntax Management | ABC 163C | Batch | 463 |
| gotoschool | N/A | ⓘTags: Syntax Go To School | ABC 142 | Batch | 861 |
| typo | N/A | ⓘTags: Syntax Typo | ABC 221 | Batch | 719 |
| workload_ex | N/A | ⓘTags: Explicitly Excluded (from IOI), Math workload_ex | Classic Problem in China (Probably) (errorgorn) | Batch | 7 |
| gravity | N/A | ⓘTags: Graph Theory gravity | USACO 2013 US Open, SIlver | Batch | 11 |
| eatcake | N/A | ⓘTags: Divide and Conquer Eating Cake | Educational Codeforces Round 94 | Batch | 76 |
| workload2 | N/A | ⓘTags: Square Root Decomposition Workload 2 | Dec Course 2021 Intermediate Contest 4 (Data Structures III) (errorgorn) | Batch | 9 |
| christmaxtrees | N/A | ⓘTags: Graph Theory, Greedy christmaxtrees | Codeforces 1283D | Batch | 49 |
| distribution | N/A | ⓘTags: Bitmask, Constructive Algorithms, Meet in the Middle Distribution | Codechef January Cook-Off 2021 | Batch | 22 |
| segmenttree3 | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window segmenttree3 | Dec Course 2021 Intermediate Contest 4 (Data Structures III) (errorgorn, oolimry) | Batch | 19 |
| problematicjourney | N/A | ⓘTags: Binary Search, Graph Theory Problematic Journey | Classic Problem | Batch | 161 |
| zooqueue | N/A | ⓘTags: Data Structures Zoo Queue | NUS December Training 2021 Diagnostic Test (shenxy13) | Batch | 134 |
| workload | N/A | ⓘTags: Dynamic Programming December Training Workload | Classic Problem | Batch | 148 |
| fizzbuzz | N/A | ⓘTags: Math, Syntax FizzBuzz | Classic Problem | Batch | 1690 |
| aircon | N/A | ⓘTags: Data Structures aircon | Codeforces Round #757 (Div. 2) | Batch | 57 |
| cups | N/A | ⓘTags: Data Structures cups | Deccourse 2021 DS II Contest (errorgorn) | Batch | 315 |
| lambsrespite | N/A | ⓘTags: Data Structures Lamb's Respite | XXII Open Cup. Grand Prix of Korea | Batch | 26 |
| digits | N/A | ⓘTags: Data Structures digits | Deccourse 2021 DS II Contest (errorgorn) | Batch | 104 |
| wall | N/A | ⓘTags: Data Structures wall | IOI 2014 | Interactive | 29 |
| rabbitpainting | N/A | ⓘTags: Greedy rabbitpainting | Dunjudge Archive (bensonlzl) | Batch | 52 |
| vouchers | N/A | ⓘTags: Dynamic Programming vouchers | Dunjudge Archive | Batch | 30 |
| lps | N/A | ⓘTags: Dynamic Programming lps | Dunjudge Archive | Batch | 79 |
| entropy2 | N/A | ⓘTags: Adhoc, Brute Force entropy2 | RI December Course Selection Test 2021 (kym) | Batch | 86 |
| feedthewallabies | N/A | ⓘTags: Graph Theory Feed the Wallabies | RI December Course Selection Test 2021 (syy) | Batch | 48 |
| clocktower | N/A | ⓘTags: Math, Syntax Clock Tower | RI December Course Selection Test 2021 (Deadeye) | Batch | 290 |
| pillars | N/A | ⓘTags: Data Structures Pillars | RI December Course Selection Test 2021 (rs) | Batch | 30 |
| wallabyhop | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window Wallaby Hop | RI December Course Selection Test 2021 (jiahng) | Batch | 48 |
| summarizing2021 | N/A | ⓘTags: Explicitly Excluded (from IOI) 🗿🗿🗿 | Hello 2022 (errorgorn) | Interactive | 28 |
| wabbitosu | N/A | ⓘTags: Adhoc, Data Structures, Greedy Wabbit osu!taiko | HCI December Course Selection 2021 (bensonlzl) | Batch | 31 |
| minimetro | N/A | ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window Minimetro | HCI December Course Selection 2021 (huangqr) | Batch | 21 |
| drones | N/A | ⓘTags: Graph Theory Drones | HCI December Course Selection 2021 (cstuart) | Batch | 105 |
| pavement | N/A | ⓘTags: Constructive Algorithms, Greedy Painting Pavements | HCI December Course Selection 2021 (pavement) | Batch | 34 |
| swapsort | N/A | ⓘTags: Adhoc Swap Sort | HCI December Course Selection 2021 (kai824, pavement) | Batch | 348 |
| reciprocals | N/A | ⓘTags: Constructive Algorithms, Syntax Reciprocals | HCI December Course Selection 2021 (huangqr, pavement) | Batch | 299 |
| ladybugs | N/A | ⓘTags: Dynamic Programming ladybugs | Dunjudge Archive | Batch | 84 |
| letters | N/A | ⓘTags: Dynamic Programming letters | Dunjudge Archive | Batch | 169 |
| lol | N/A | ⓘTags: Dynamic Programming lol | Dunjudge Archive | Batch | 178 |
| exoticplants | N/A | ⓘTags: Graph Theory Exotic Plants | Luogu P4568 [JLOI2011] | Batch | 55 |
| razlika | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window razlika | COCI 2013 | Batch | 278 |
| prefixsums | N/A | ⓘTags: Dynamic Programming, Syntax prefixsums | Classic Problem | Batch | 976 |
| equals | N/A | ⓘTags: Graph Theory equals | ARC 097 | Batch | 54 |
| kthsubstring | N/A | ⓘTags: Adhoc kthsubstring | ARC 097 | Batch | 58 |
| dominoes | N/A | ⓘTags: Binary Search, Data Structures, Square Root Decomposition dominoes | Educational Round 9 (maomao90, zaneyu) | Batch | 11 |
| coins | N/A | ⓘTags: Information Theory Coins | IOI 2017 Practice | Communication | 36 |
| binomial | N/A | ⓘTags: Math binomial | Dunjudge Archive | Batch | 44 |
| boxes_hkicpc | N/A | ⓘTags: Graph Theory, Trees Boxes | 2016 ACM ICPC Asia Hong Kong Regional | Batch | 49 |
| hunter | N/A | ⓘTags: Graph Theory, Trees Hunter | Dunjudge Archive (bensonlzl) | Interactive | 46 |
| closedrooms | N/A | ⓘTags: Adhoc, Graph Theory closedrooms | AtCoder Grand Contest 014 | Batch | 70 |
| gridgame | N/A | ⓘTags: Graph Theory gridgame | Dunjudge Archive | Batch | 67 |
| fireandbeary | N/A | ⓘTags: Graph Theory fireandbeary | Dunjudge Archive (jamielim) | Batch | 99 |
| workoutplan | N/A | ⓘTags: Greedy Workout plan | Bubble Cup 12 Div 1 | Batch | 166 |
| primesort | N/A | ⓘTags: Graph Theory, Math Prime Sort | Dunjudge Archive | Batch | 80 |
| spiderweb | N/A | ⓘTags: Dynamic Programming, Graph Theory spiderweb | Dunjudge Archive | Batch | 24 |
| cookieclickeralpha | N/A | ⓘTags: Math, Syntax cookieclickeralpha | Google Code Jam 2014 | Batch | 87 |
| boring | N/A | ⓘTags: Dynamic Programming boring | Dunjudge Archive | Batch | 29 |
| area | N/A | ⓘTags: Syntax area | Dunjudge Archive | Batch | 712 |
| solonim | N/A | ⓘTags: Explicitly Excluded (from IOI), Math, Syntax Solo Nim | Dunjudge Archive | Batch | 223 |
| sardines | N/A | ⓘTags: Data Structures, Dynamic Programming sardines | RI NOI Selection Test 2014 | Batch | 24 |
| deliveroo | N/A | ⓘTags: Data Structures, Greedy Deliveroo | RI November Course Stage 2 Selection Test 2021 (Deadeye) | Batch | 49 |
| levelingup | N/A | ⓘTags: Dynamic Programming Leveling Up | RI November Course Stage 2 Selection Test 2021 (ryangohca) | Batch | 100 |
| greenbeans | N/A | ⓘTags: Adhoc, Math, Syntax Green Beans Mayhem | RI November Course Stage 2 Selection Test 2021 (ryangohca, kym) | Batch | 93 |
| coinjourney | N/A | ⓘTags: Binary Search Coin Journey | RI November Course Stage 2 Selection Test 2021 (kym) | Batch | 138 |
| timeexam | N/A | ⓘTags: Math, Syntax What's the Time? | RI November Course Stage 2 Selection Test 2021 (ryangohca) | Batch | 1136 |
| duels | N/A | ⓘTags: Adhoc, Data Structures duels | Educational Round 9 (maomao90, jamessng) | Batch | 18 |
| orangeroad | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window orangeroad | Educational Round 9 (jamessng, jamielim) | Batch | 20 |
| portals | N/A | ⓘTags: Data Structures, Graph Theory portals | USACO 2021 US Open, Gold | Batch | 15 |
| holeetree | N/A | ⓘTags: Explicitly Excluded (from IOI) \( H^{o^{L^{e^e_e}_{e^e_e}}_{L^{e^e_e}_{ e^e_e}}}_{o^{L^{e^e_e}_{ e^e_e}}_{L^{e^e_e}_{e^e_e}}} \) 🎄 | Hello 2022 (errorgorn) | Batch | 10 |
| spellofweakness | N/A | ⓘTags: Binary Search, Greedy, Line Sweep/Sliding Window Spell Of Weakness | Dunjudge Archive (dantoh) | Batch | 166 |
| bananasmoothie | N/A | ⓘTags: Greedy Banana Smoothie | Dunjudge Archive (shenxy13) | Batch | 459 |
| adjacentswaps | N/A | ⓘTags: Brute Force, Greedy Adjacent Swaps | Dunjudge Archive (shenxy13) | Batch | 65 |
| jedan | N/A | ⓘTags: Dynamic Programming jedan | COCI 2012/2013 | Batch | 6 |
| stones | N/A | ⓘTags: Graph Theory, Trees stones | Dunjudge Archive | Batch | 104 |
| hyperoperations | N/A | ⓘTags: Math hyperoperations | Dunjudge Archive | Batch | 4 |
| pigeons | N/A | ⓘTags: Brute Force pigeons | Classic Problem | Batch | 616 |
| diamond | N/A | ⓘTags: Syntax diamond | Classic Problem | Batch | 753 |
| psle | N/A | ⓘTags: Syntax Old PSLE Grading System | Classic Problem | Batch | 1864 |
| 3nplus1II | N/A | ⓘTags: Syntax 3nplus1II | Classic Problem | Batch | 780 |
| 3nplus1 | N/A | ⓘTags: Syntax 3nplus1 | Classic Problem | Batch | 2057 |
| rightangtri | N/A | ⓘTags: Syntax rightangtri | Classic Problem | Batch | 1621 |
| evenorodd | N/A | ⓘTags: Syntax evenorodd | Classic Problem | Batch | 2043 |
| boxhaskey | N/A | ⓘTags: Graph Theory Box Has Key | HCI-RI 2020 May Contest (bensonlzl) | Batch | 29 |
| rainbowroad | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory, Trees Rainbow Road | HCI-RI 2020 May Contest (bensonlzl) | Batch | 30 |
| pressstart | N/A | ⓘTags: Data Structures, Graph Theory Press Start! | HCI-RI 2020 May Contest (bensonlzl) | Batch | 26 |
| bracketsyndrome | N/A | ⓘTags: Adhoc, Data Structures Bracket Syndrome | RI-HCI NOI Selection Test 2019 | Batch | 196 |
| destroy | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Destroy | RI-HCI NOI Selection Test 2019 | Batch | 19 |
| wires | N/A | ⓘTags: Adhoc Wires | RI-HCI NOI Selection Test 2019 (bensonlzl) | Interactive | 72 |
| usefft4 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 4 | Valentine's Day Contest 2022 (errorgorn) | Batch | 4 |
| consistency | N/A | ⓘTags: Data Structures Consistency | RI-HCI NOI Selection Test 2019 (bensonlzl) | Batch | 3 |
| rainbowrabbit | N/A | ⓘTags: Adhoc, Greedy rainbowrabbit | RI-HCI December Course Selection 2019 (bensonlzl) | Batch | 84 |
| rabbitroad | N/A | ⓘTags: Binary Search, Graph Theory, Greedy, Trees RabbitRoad | RI-HCI December Course Selection 2019 (bensonlzl) | Batch | 30 |
| badtree | N/A | ⓘTags: Binary Search, Data Structures badtree | RI-HCI December Course Selection 2019 (bensonlzl) | Batch | 29 |
| orangecollector | N/A | ⓘTags: Bitmask, Data Structures, Dynamic Programming Orange Collector | RI-HCI December Course Selection 2019 (rs) | Batch | 26 |
| escalation | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees escalation | RI-HCI December Course Selection 2019 (bensonlzl) | Batch | 31 |
| circleselection | N/A | ⓘTags: Data Structures, Math Circle selection | APIO 2018 | Batch | 7 |
| duathlon | N/A | ⓘTags: Graph Theory, Trees Duathlon | APIO 2018 | Batch | 14 |
| f7 | N/A | ⓘTags: Greedy F7 | COCI 2012/2013 | Batch | 165 |
| forensic | N/A | ⓘTags: Brute Force, Graph Theory forensic | NOI 2012 | Batch | 10 |
| modsum | N/A | ⓘTags: Dynamic Programming, Math modsum | NOI 2012 | Batch | 98 |
| diesel | N/A | ⓘTags: Dynamic Programming, Graph Theory diesel | NOI 2013 | Batch | 10 |
| obelisk | N/A | ⓘTags: Graph Theory obelisk | NOI 2014 | Batch | 5 |
| cats | N/A | ⓘTags: Adhoc cats | NOI 2014 | Batch | 7 |
| island | N/A | ⓘTags: Graph Theory, Math, Trees Island | NOI 2018 Prelims | Batch | 35 |
| snail | N/A | ⓘTags: Adhoc, Syntax Snail | NOI 2018 Prelims | Batch | 94 |
| robot | N/A | ⓘTags: Data Structures Robots | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch | 14 |
| badnim3 | N/A | ⓘTags: Bitmask, Explicitly Excluded (from IOI), Math Bad Nim 3 (EE) | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch | 7 |
| monke | N/A | ⓘTags: Math Monke | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch | 8 |
| badnim2 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Bad Nim 2 (EE) | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch | 5 |
| mamamintaplusa | N/A | ⓘTags: Greedy mama MINta PLUSa | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch | 25 |
| coolinteractive | N/A | ⓘTags: Adhoc Cool Interactive | Educational Round 8 (Goodbye oolimry) (errorgorn) | Interactive | 12 |
| epicinteractive | N/A | ⓘTags: Adhoc, Information Theory, Math Epic Interactive | Educational Round 8 (Goodbye oolimry) (errorgorn, oolimry) | Interactive | 4 |
| suffixarray | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Oolimry and Suffix Array | Codeforces Round 723 (zaneyu) | Batch | 6 |
| killanton | N/A | ⓘTags: Brute Force, Greedy Kill Anton | Codeforces Round 723 (errorgorn) | Batch | 9 |
| potionshard | N/A | ⓘTags: Greedy Potions (Hard Version) | Codeforces Round 723 (errorgorn, oolimry) | Batch | 72 |
| potionseasy | N/A | ⓘTags: Dynamic Programming, Greedy Potions (Easy Version) | Codeforces Round 723 (errorgorn, oolimry) | Batch | 60 |
| ihate1111 | N/A | ⓘTags: Adhoc, Math I Hate 1111 | Codeforces Round 723 (errorgorn) | Batch | 293 |
| switchandflip | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Math Switch and Flip | Codeforces Global Round 13 (errorgorn, oolimry) | Batch | 3 |
| infinitezoo | N/A | ⓘTags: Bitmask, Graph Theory, Greedy, Math Zookeeper and The Infinite Zoo | Codeforces Global Round 13 (errorgorn) | Batch | 13 |
| ruler | N/A | ⓘTags: Brute Force, Data Structures Ruler Of The Zoo | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch | 4 |
| pekora | N/A | ⓘTags: Greedy Pekora and Trampoline | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch | 15 |
| palindromicfizzbuzz | N/A | ⓘTags: Syntax Palindromic FizzBuzz | NOI 2019 Prelims (pwypeanut) | Batch | 462 |
| lostarray | N/A | ⓘTags: Adhoc, Constructive Algorithms Lost Array | NOI 2019 Prelims | Batch | 225 |
| squarerect | N/A | ⓘTags: Adhoc, Binary Search, Information Theory Square or Rectangle? | NOI 2019 Prelims (pwypeanut) | Interactive | 49 |
| virus | N/A | ⓘTags: Adhoc, Graph Theory, Line Sweep/Sliding Window virus | JOISC 2017 (Day 1) | Batch | 3 |
| mirrortree | N/A | ⓘTags: Graph Theory, Trees mirrortree | BOI 2011, Day 2 | Batch | 4 |
| airline | N/A | ⓘTags: Graph Theory, Information Theory airline | JOISC 2018 (Day 3) | Communication | 13 |
| dungeons2 | N/A | ⓘTags: Binary Search, Data Structures dungeons2 | AGM 2021, Final Round, Day 2 | Batch | 10 |
| sillysort | N/A | ⓘTags: Math sillysort | info(1) cup 2019 (modified) (errorgorn) | Batch | 11 |
| trivialmaths2 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math trivialmaths2 (EE) | Educational Round 7 (errorgorn) | Batch | 6 |
| oridance | N/A | ⓘTags: Dynamic Programming Orientation Dance | Codeforces 1509C | Batch | 117 |
| addone | N/A | ⓘTags: Dynamic Programming Add One | Codeforces 1513C | Batch | 43 |
| switches | N/A | ⓘTags: Explicitly Excluded (from IOI), Math switches | Educational Round 7 (myrcella, errorgorn) | Batch | 6 |
| bosubaiko | N/A | ⓘTags: Adhoc, Greedy Bosu Baiko | Educational Round 6 (errorgorn) | Batch | 38 |
| robobear | N/A | ⓘTags: Graph Theory The Maze of RoboBear | Tuymaada 2021 | Batch | 23 |
| findandprevent | N/A | ⓘTags: Graph Theory, Trees Find and Prevent | Tuymaada 2021 | Batch | 24 |
| judgeantibreaker | N/A | ⓘTags: Binary Search, Square Root Decomposition judgeantibreaker | Educational Round 6 (oolimry) | Batch | 11 |
| fourbuckets | N/A | ⓘTags: Adhoc, Math Four Buckets | Educational Round 6 (oolimry) | Batch | 32 |
| persistentlists | N/A | ⓘTags: Binary Search, Data Structures, Square Root Decomposition Persistent Lists | Educational Round 6 (oolimry) | Batch | 6 |
| hellokitty | N/A | ⓘTags: Binary Search, Data Structures, Math hellokitty | Dunjudge Archive | Batch | 33 |
| cudak | N/A | ⓘTags: Binary Search, Dynamic Programming cudak | COCI 2007/2008 | Batch | 40 |
| routes | N/A | ⓘTags: Adhoc, Graph Theory routes | Dunjudge Archive | Batch | 19 |
| quality | N/A | ⓘTags: Binary Search, Dynamic Programming Quality of Living | IOI 2010 | Interactive | 11 |
| flooding | N/A | ⓘTags: Graph Theory flooding | Dunjudge Archive | Batch | 14 |
| burger | N/A | ⓘTags: Greedy burger | Code Jam to I/O 2018 for Women | Batch | 28 |
| toblerone | N/A | ⓘTags: Brute Force, Dynamic Programming, Greedy toblerone | HCI Mock NOI 2015 | Batch | 25 |
| twomeals | N/A | ⓘTags: Brute Force, Dynamic Programming, Greedy twomeals | Dunjudge Archive | Batch | 238 |
| badnim | N/A | ⓘTags: Explicitly Excluded (from IOI), Math badnim | Educational Round 7 (errorgorn) | Batch | 57 |
| pancake | N/A | ⓘTags: Brute Force, Graph Theory pancake | NOI 2012 | Batch | 48 |
| switches2 | N/A | ⓘTags: Dynamic Programming, Math switches2 | Educational Round 7 (errorgorn) | Batch | 9 |
| switches998244353 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math switches998244353 (EE) | Educational Round 7 (errorgorn) | Batch | 5 |
| cashmoney | N/A | ⓘTags: Math Cash Money | 2020 CNY | Batch | 16 |
| parade | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees parade | Dunjudge Archive | Batch | 74 |
| productcounting | N/A | ⓘTags: Divide and Conquer, Square Root Decomposition Product Counting | Educational Round 5 (errorgorn) | Batch | 6 |
| lottery | N/A | ⓘTags: Adhoc Lottery | CEOI 2018 | Batch | 6 |
| cloudcomputing | N/A | ⓘTags: Dynamic Programming Cloud computing | CEOI 2018 | Batch | 20 |
| mandarins | N/A | ⓘTags: Math Mandarins | 2020 CNY | Batch | 92 |
| friendcross | N/A | ⓘTags: Data Structures friendcross | USACO 2017 Feb Plat | Batch | 5 |
| supplies | N/A | ⓘTags: Graph Theory supplies | Dunjudge Archive | Batch | 155 |
| knightmoves | N/A | ⓘTags: Graph Theory knightmoves | Dunjudge Archive | Batch | 247 |
| mining | N/A | ⓘTags: Graph Theory mining | Dunjudge Archive | Batch | 44 |
| erp | N/A | ⓘTags: Graph Theory erp | Dunjudge Archive | Batch | 130 |
| heatwv | N/A | ⓘTags: Graph Theory Heat Wave | Dunjudge Archive | Batch | 223 |
| party | N/A | ⓘTags: Data Structures, Graph Theory party | Dunjudge Archive | Batch | 402 |
| marathon_usaco | N/A | ⓘTags: Data Structures Marathon | USACO 2014 Dec, Gold | Batch | 7 |
| schedule | N/A | ⓘTags: Dynamic Programming, Graph Theory schedule | HCI NOI Selection Test 2014 | Batch | 18 |
| streets | N/A | ⓘTags: Data Structures, Graph Theory, Trees One-Way Streets | CEOI 2017 | Batch | 16 |
| friend | N/A | ⓘTags: Adhoc friend | IOI 2014 | Interactive | 12 |
| tournament | N/A | ⓘTags: Graph Theory, Trees tournament | IOI 2012 | Interactive | 13 |
| registers | N/A | ⓘTags: Bitmask, Constructive Algorithms Bit Shift Registers | IOI 2021 (Day 2) | Interactive | 5 |
| dungeons | N/A | ⓘTags: Graph Theory Dungeons Game | IOI 2021 (Day 2) | Interactive | 5 |
| dna_ioi | N/A | ⓘTags: Adhoc Mutating DNA | IOI 2021 (Day 2) | Interactive | 79 |
| candies_ioi | N/A | ⓘTags: Data Structures Distributing Candies | IOI 2021 (Day 1) | Interactive | 19 |
| parks | N/A | ⓘTags: Adhoc, Constructive Algorithms, Graph Theory Fountain Parks | IOI 2021 (Day 1) | Interactive | 7 |
| keys | N/A | ⓘTags: Graph Theory, Trees Keys | IOI 2021 (Day 1) | Interactive | 12 |
| graphoverflow | N/A | ⓘTags: Graph Theory, Math graphoverflow | RI Deccourse 2018 Selection Test (jerryhanjt) | Batch | 13 |
| divsum_dec18 | N/A | ⓘTags: Math Divsum | RI Deccourse 2018 Selection Test (eutroph) | Batch | 21 |
| askonegetonefree | N/A | ⓘTags: Binary Search, Dynamic Programming AskOneGetOneFree | NOI 2015 | Interactive | 21 |
| elephants | N/A | ⓘTags: Binary Search, Square Root Decomposition Elephants | IOI 2011 | Interactive | 9 |
| newhome | N/A | ⓘTags: Divide and Conquer, Slope Trick New Home | APIO 2018 | Batch | 7 |
| bridge_cerc | N/A | ⓘTags: Graph Theory, Square Root Decomposition Bridge | CERC 2018 | Batch | 5 |
| ponteng | N/A | ⓘTags: Math, Square Root Decomposition Ponteng | 2019 IOI Problem Setter Contest | Batch | 17 |
| mobitel | N/A | ⓘTags: Dynamic Programming, Square Root Decomposition Mobitel | COCI 2018/2019 | Batch | 14 |
| historical | N/A | ⓘTags: Square Root Decomposition Historical | JOI 2013/2014 | Batch | 35 |
| mathtree | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Math Tree | SGP Sparring 2021 (lovemathboy) | Batch | 33 |
| seedflare | N/A | ⓘTags: Information Theory Seed Flare | SGP Sparring 2021 (lovemathboy) | Interactive | 17 |
| seabreakpath | N/A | ⓘTags: Data Structures Seabreak Path | SGP Sparring 2021 (lovemathboy) | Batch | 3 |
| sonya | N/A | ⓘTags: Dynamic Programming, Slope Trick Sonya and Problem Wihtout A Legend | Codeforces 713C | Batch | 39 |
| minimum | N/A | ⓘTags: Syntax minimum | Classic Problem | Interactive | 1016 |
| indivisibility | N/A | ⓘTags: Math indivisibility | Dunjudge Archive | Batch | 47 |
| thanossort_st4 | N/A | ⓘTags: Adhoc, Divide and Conquer, Explicitly Excluded (from IOI) thanossort_st4 | RSA Fun Contest (errorgorn) | Interactive | 13 |
| thanossort | N/A | ⓘTags: Adhoc, Divide and Conquer thanossort | RSA Fun Contest (errorgorn) | Interactive | 16 |
| fireworks | N/A | ⓘTags: Dynamic Programming, Graph Theory, Slope Trick, Trees Fireworks | APIO 2016 | Batch | 23 |
| warp | N/A | ⓘTags: Bitmask, Dynamic Programming warp | HCI NOI Selection Retest 2020 (bensonlzl) | Batch | 62 |
| skyline | N/A | ⓘTags: Graph Theory, Greedy skyline | HCI NOI Selection Retest 2020 (bensonlzl) | Batch | 76 |
| colourblind | N/A | ⓘTags: Graph Theory colourblind | HCI NOI Selection Retest 2020 (bensonlzl) | Interactive | 20 |
| meetings | N/A | ⓘTags: Data Structures, Divide and Conquer Meetings | IOI 2018 | Interactive | 6 |
| doll | N/A | ⓘTags: Adhoc, Constructive Algorithms Mechanical Doll | IOI 2018 | Interactive | 14 |
| highway | N/A | ⓘTags: Binary Search, Information Theory Highway Tolls | IOI 2018 | Interactive | 10 |
| race | N/A | ⓘTags: Divide and Conquer, Trees Race | IOI 2011 | Interactive | 66 |
| mushrooms | N/A | ⓘTags: Constructive Algorithms, Information Theory Counting Mushrooms | IOI 2020 (Day 2) | Interactive | 7 |
| promotion | N/A | ⓘTags: Data Structures, Graph Theory, Trees Promotion Counting | USACO 2017 Jan, Platinum | Batch | 55 |
| rabbitbridges | N/A | ⓘTags: Binary Search, Graph Theory Rabbit Bridges | Educational Round 5 (oolimry) | Batch | 19 |
| powersupply | N/A | ⓘTags: Adhoc, Data Structures, Line Sweep/Sliding Window, Math Power Supply | Educational Round 5 (cstuart) | Batch | 5 |
| lfs | N/A | ⓘTags: Dynamic Programming, Math Longest Factor Subsequence | Educational Round 5 (errorgorn) | Batch | 53 |
| funfair | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Funfair | Educational Round 5 (rs) | Batch | 36 |
| supertrees | N/A | ⓘTags: Adhoc, Constructive Algorithms, Graph Theory Connecting Supertrees | IOI 2020 (Day 1) | Interactive | 30 |
| plants | N/A | ⓘTags: Binary Search, Data Structures Comparing Plants | IOI 2020 (Day 1) | Interactive | 7 |
| midas | N/A | ⓘTags: Graph Theory, Trees Midas | POI 2017 Round 3 Day 1 Q1 | Batch | 20 |
| molecules | N/A | ⓘTags: Adhoc, Line Sweep/Sliding Window Detecting Molecules | IOI 2016 | Interactive | 30 |
| flood | N/A | ⓘTags: Graph Theory, Math Flood | POI 2018 Round 1 Q3 | Batch | 12 |
| container | N/A | ⓘTags: Square Root Decomposition Shipping Containers | POI 2017 Round 2 Day 2 Q1 | Batch | 44 |
| threetowers | N/A | ⓘTags: Brute Force, Greedy threetowers | POI 2015 Round 2 Day 2 Q2 | Batch | 19 |
| wombats | N/A | ⓘTags: Data Structures wombats | IOI 2013 (Day 1) | Interactive | 4 |
| dreaming | N/A | ⓘTags: Graph Theory dreaming | IOI 2013 (Day 1) | Interactive | 27 |
| animaleditor | N/A | ⓘTags: Data Structures animaleditor | MCO | Batch | 22 |
| cave | N/A | ⓘTags: Binary Search cave | IOI 2013 | Interactive | 51 |
| leastround | N/A | ⓘTags: Dynamic Programming leastround | Codeforces 2B | Batch | 12 |
| garden_ioi05 | N/A | ⓘTags: Brute Force, Dynamic Programming Garden | IOI 2005 | Batch | 21 |
| garden_ioi08 | N/A | ⓘTags: Dynamic Programming Linear Garden | IOI 2008 | Batch | 18 |
| umbrella | N/A | ⓘTags: Dynamic Programming umbrella | USACO Silver Dec 2011 | Batch | 32 |
| robots | N/A | ⓘTags: Binary Search, Greedy robots | IOI 2013 | Interactive | 33 |
| fruits | N/A | ⓘTags: Data Structures, Greedy fruits | Dunjudge Archive | Batch | 42 |
| tourist | N/A | ⓘTags: Data Structures, Greedy tourist | IOI 2012 Practice Tasks | Batch | 96 |
| convexhull | N/A | ⓘTags: Data Structures Convex Hull | Classic Problem (ryangohca) | Batch | 90 |
| roads | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Road Closures | APIO 2021 | Interactive | 13 |
| collectingstamps3 | N/A | ⓘTags: Dynamic Programming collectingstamps3 | JOI 2020 Final Round | Batch | 8 |
| jjooii2 | N/A | ⓘTags: Adhoc, Binary Search, Line Sweep/Sliding Window jjooii2 | JOI 2020 Final Round | Batch | 32 |
| infiniteseq | N/A | ⓘTags: Dynamic Programming infiniteseq | AtCoder Regular Contest 071 | Batch | 6 |
| tents | N/A | ⓘTags: Dynamic Programming Tents | JOI 2017/2018 Spring Camp | Batch | 9 |
| changingcolours | N/A | ⓘTags: Data Structures, Dynamic Programming changingcolours | RI Problem Setter Contest 2019 (rs) | Batch | 13 |
| orlando | N/A | ⓘTags: Bitmask, Data Structures, Dynamic Programming, Graph Theory, Trees orlando | RI Problem Setter Contest 2019 (zhuan, 0rang3) | Batch | 5 |
| birthday | N/A | ⓘTags: Explicitly Excluded (from IOI), Math birthday | RI Problem Setter Contest 2019 (syy) | Batch | 6 |
| marathon | N/A | ⓘTags: Dynamic Programming, Graph Theory marathon | RI Problem Setter Contest 2019 (Ziwyy) | Batch | 6 |
| rabbitplane | N/A | ⓘTags: Binary Search, Greedy rabbitplane | RI Problem Setter Contest 2019 (bensonlzl) | Batch | 17 |
| lineup2 | N/A | ⓘTags: Syntax Lineup | RI Problem Setter Contest 2019 (rs) | Batch | 110 |
| kickingshoes | N/A | ⓘTags: Data Structures, Greedy, Math Kicking Shoes | Educational Round 4 (maomao90) | Batch | 18 |
| 7up | N/A | ⓘTags: Syntax 7up | RI November Course Stage 2 Selection Test 2019 | Batch | 323 |
| scrivener | N/A | ⓘTags: Data Structures Crayfish scrivener | IOI 2012 | Interactive | 25 |
| cousin | N/A | ⓘTags: Graph Theory, Trees cousin | Dunjudge Archive | Interactive | 24 |
| candyshop | N/A | ⓘTags: Data Structures candyshop | Classic Problem | Batch | 87 |
| construction | N/A | ⓘTags: Graph Theory, Trees Construction of Highway | JOI 2017/2018 Spring Camp | Batch | 11 |
| jumps | N/A | ⓘTags: Data Structures, Greedy Rainforest Jumps | APIO 2021 (bensonlzl) | Interactive | 28 |
| hexagon | N/A | ⓘTags: Graph Theory, Math Hexagonal Territory | APIO 2021 | Interactive | 2 |
| count1graphs | N/A | ⓘTags: Math Count 1 Graphs | Educational Round 4 (maomao90, errorgorn) | Batch | 4 |
| gwynethandtree | N/A | ⓘTags: Divide and Conquer, Graph Theory, Trees Gwyneth and Tree | Codeforces 342E | Batch | 74 |
| chemistry | N/A | ⓘTags: Dynamic Programming, Joke chemistry | April Fools Contest 2020 (0rang3) | Batch | 15 |
| wormholes | N/A | ⓘTags: Dynamic Programming wormholes | Dunjudge Archive | Batch | 197 |
| istj | N/A | ⓘTags: Data Structures, Trees ISTJ | 2020 CNY, Classic Problem (0rang3, shenxy13) | Batch | 19 |
| bookshelf | N/A | ⓘTags: Data Structures bookshelf | Dunjudge Archive | Batch | 88 |
| bombing | N/A | ⓘTags: Graph Theory bombing | Dunjudge Archive | Batch | 38 |
| atm | N/A | ⓘTags: Graph Theory The Great ATM Robbery | APIO 2009 | Batch | 48 |
| mice | N/A | ⓘTags: Graph Theory mice | Dunjudge Archive | Batch | 23 |
| bombing2 | N/A | ⓘTags: Graph Theory bombing2 | Dunjudge Archive | Batch | 37 |
| sailor | N/A | ⓘTags: Graph Theory sailor | CPSPC 2010 | Batch | 30 |
| doodles | N/A | ⓘTags: Graph Theory, Math doodles | December Course 2019 Advanced Final Contest (rs) | Batch | 7 |
| clockpalindrome | N/A | ⓘTags: Adhoc, Dynamic Programming clockpalindrome | December Course 2019 Advanced Final Contest | Batch | 11 |
| hdb | N/A | ⓘTags: Data Structures, Dynamic Programming hdb | Dunjudge Archive | Batch | 39 |
| skyscraper_apio15 | N/A | ⓘTags: Graph Theory, Square Root Decomposition Jakarta Skyscrapers | APIO 2015 | Batch | 26 |
| lppufdsrb | N/A | ⓘTags: Data Structures, Graph Theory, Square Root Decomposition Lazy Propagation Persistent Union Find Disjoint Set with Rollbacks | Educational Round 4 (jamessng, errorgorn) | Batch | 13 |
| edgeflip | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Edge Flipping | Educational Round 4 (jamessng) | Batch | 16 |
| bubblesort | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Bubble Sort | Educational Round 4 (jamessng, zaneyu, oolimry) | Batch | 21 |
| boarding | N/A | ⓘTags: Adhoc, Dynamic Programming, Graph Theory boarding | NUSH ISC 2018 | Batch | 4 |
| chess | N/A | ⓘTags: Adhoc, Bitmask, Data Structures chess | NUSH ISC 2018 | Batch | 11 |
| bananaland | N/A | ⓘTags: Dynamic Programming bananaland | NUSH ISC 2018 | Batch | 11 |
| strangedevice | N/A | ⓘTags: Data Structures, Math Strange Device | APIO 2019 | Batch | 26 |
| sandd | N/A | ⓘTags: Binary Search sandd | Classic Problem | Interactive | 265 |
| mugger | N/A | ⓘTags: Dynamic Programming mugger | RI Problem Setter Contest 2019 (ngmh) | Batch | 45 |
| bridges_apio19 | N/A | ⓘTags: Graph Theory, Square Root Decomposition Bridges | APIO 2019 | Batch | 20 |
| badknapsack | N/A | ⓘTags: Brute Force, Dynamic Programming badknapsack | Educational Round 3 (errorgorn) | Batch | 22 |
| inversemax | N/A | ⓘTags: Bitmask, Dynamic Programming inversemax | Educational Round 3 (errorgorn) | Batch | 30 |
| cheaters | N/A | ⓘTags: Explicitly Excluded (from IOI), Math cheaters | Educational Round 3 (errorgorn) | Batch | 7 |
| fencing3 | N/A | ⓘTags: Data Structures, Square Root Decomposition fencing3 | Educational Round 3 (errorgorn, tqbfjotld) | Batch | 6 |
| catalansum | N/A | ⓘTags: Explicitly Excluded (from IOI), Math catalansum (EE) | Educational Round 3 (errorgorn, oolimry) | Batch | 17 |
| cardgame2 | N/A | ⓘTags: Dynamic Programming cardgame2 | Dunjudge Archive | Batch | 11 |
| cardgame | N/A | ⓘTags: Data Structures, Dynamic Programming cardgame | Dunjudge Archive | Batch | 14 |
| primepie | N/A | ⓘTags: Math primepie | Dunjudge Archive | Interactive | 70 |
| orchard2 | N/A | ⓘTags: Dynamic Programming orchard2 | RI NOI Selection Test 2015 | Batch | 21 |
| hacker | N/A | ⓘTags: Data Structures, Greedy, Line Sweep/Sliding Window hacker | BOI 2015 | Batch | 20 |
| sawmills | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Two Sawmills | CEOI 2004 | Batch | 19 |
| scanner | N/A | ⓘTags: Dynamic Programming scanner | Dunjudge Archive | Batch | 56 |
| jumping2 | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Jumping | Dunjudge Archive | Batch | 35 |
| ballot | N/A | ⓘTags: Data Structures ballot | Dunjudge Archive | Batch | 221 |
| UCFJ | N/A | ⓘTags: Data Structures UCFJ | USACO 2021 US Open, Platinum | Batch | 9 |
| corporate | N/A | ⓘTags: Data Structures, Divide and Conquer Corporate | IOI 2020 Practice Session | Batch | 17 |
| sequence_apio | N/A | ⓘTags: Dynamic Programming Split the sequence | APIO 2014 | Batch | 34 |
| sort | N/A | ⓘTags: Adhoc sort | Classic Problem? | Batch | 439 |
| aliens | N/A | ⓘTags: Data Structures aliens | Dunjudge Archive | Batch | 30 |
| GSS | N/A | ⓘTags: Greedy GSS | Dunjudge Archive | Batch | 656 |
| scalars | N/A | ⓘTags: Greedy scalars | Dunjudge Archive | Batch | 386 |
| chinese | N/A | ⓘTags: Syntax chinese | Dunjudge Archive | Batch | 211 |
| potatosalad | N/A | ⓘTags: Greedy potatosalad | Classic Problem | Batch | 1344 |
| skillmoves | N/A | ⓘTags: Data Structures, Greedy skillmoves | RI November Course Stage 2 Selection Test 2019 | Batch | 125 |
| cuberoot | N/A | ⓘTags: Binary Search, Math, Syntax cuberoot | Classic Problem | Batch | 1068 |
| sudoku | N/A | ⓘTags: Constructive Algorithms, Greedy sudoku | NOI 2015 | Batch | 9 |
| shuffle | N/A | ⓘTags: Constructive Algorithms, Graph Theory shuffle | NOI 2019 (guangxuan) | Interactive | 9 |
| citymapping | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Information Theory, Trees CityMapping | NOI 2018 (pwypeanut) | Interactive | 18 |
| lampposts | N/A | ⓘTags: Binary Search lampposts | Dunjudge Archive | Interactive | 34 |
| cards | N/A | ⓘTags: Data Structures cards | Dunjudge Archive | Batch | 73 |
| chunlian | N/A | ⓘTags: Data Structures chunlian | Dunjudge Archive | Batch | 57 |
| 1402 | N/A | ⓘTags: Adhoc, Joke 1402 | April Fools' 2021 (bensonlzl) | Batch | 95 |
| aliens_ioi | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming Aliens | IOI 2016 | Interactive | 14 |
| countedges | N/A | ⓘTags: Dynamic Programming, Graph Theory, Math Counting Edges | USACO 2021 February Contest, Platinum | Batch | 3 |
| minedges | N/A | ⓘTags: Graph Theory Minimizing Edges | USACO 2021 February Contest, Platinum | Batch | 4 |
| notimetodry | N/A | ⓘTags: Data Structures, Square Root Decomposition No Time to Dry | USACO 2021 February Contest, Platinum | Batch | 11 |
| escapesadland | N/A | ⓘTags: Binary Search, Graph Theory Escape Sadland | Dunjudge Archive | Batch | 5 |
| snack | N/A | ⓘTags: Dynamic Programming, Greedy snack | Dunjudge Archive | Batch | 402 |
| stepgame | N/A | ⓘTags: Dynamic Programming, Greedy stepgame | Classic Problem | Batch | 589 |
| badpotato | N/A | ⓘTags: Dynamic Programming badpotato | Dunjudge Archive | Batch | 307 |
| malcolm | N/A | ⓘTags: Line Sweep/Sliding Window malcolm | COCI 2012/2013 | Batch | 52 |
| squidzofrenzic | N/A | ⓘTags: Binary Search squidzofrenzic | Dunjudge Archive | Batch | 428 |
| restaurant | N/A | ⓘTags: Greedy restaurant | Dunjudge Archive | Batch | 124 |
| carpark | N/A | ⓘTags: Greedy carpark | Dunjudge Archive | Batch | 374 |
| explosion | N/A | ⓘTags: Math explosion | Classic Problem | Batch | 193 |
| countalp | N/A | ⓘTags: Syntax countalp | Classic Problem | Batch | 522 |
| pigeonhole | N/A | ⓘTags: Data Structures pigeonhole | Dunjudge Archive | Batch | 272 |
| uniquenumbers | N/A | ⓘTags: Data Structures uniquenumbers | Classic Problem | Batch | 978 |
| reflection | N/A | ⓘTags: Constructive Algorithms, Math reflection | RI-HCI NOI Selection Test 2020 (eutroph) | Batch | 3 |
| solarstorm | N/A | ⓘTags: Graph Theory, Line Sweep/Sliding Window, Trees Solar Storm | NOI 2020 Prelims | Batch | 42 |
| harbingers | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees harbingers | CEOI 2009 | Batch | 14 |
| gizmoguy | N/A | ⓘTags: Slope Trick Gizmo Guy | IOI 2020 Practice Session | Batch | 9 |
| housevisit | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees housevisit | CNY Contest 2019 (bensonlzl) | Batch | 56 |
| 1821 | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Joke, Trees 1821 | April Fools' 2021 (zaneyu) | Batch | 233 |
| 0405 | N/A | ⓘTags: Joke, Math 0405 | April Fools' 2021 (zaneyu) | Batch | 122 |
| 1503 | N/A | ⓘTags: Adhoc, Joke 1503 | April Fools' 2021 (jamielim) | Batch | 94 |
| pond | N/A | ⓘTags: Data Structures, Dynamic Programming pond | NOI 2021 Finals (jeff_) | Batch | 3 |
| archaeologist | N/A | ⓘTags: Adhoc archaeologist | NOI 2021 Finals | Interactive | 28 |
| tiles | N/A | ⓘTags: Bitmask, Data Structures, Dynamic Programming tiles | NOI 2021 Finals (eutroph) | Batch | 48 |
| fraud | N/A | ⓘTags: Adhoc, Math fraud | NOI 2021 Finals (Damian) | Batch | 193 |
| password | N/A | ⓘTags: Data Structures, Dynamic Programming, Greedy, Slope Trick password | NOI 2021 Finals (ngyupeng6) | Batch | 53 |
| 1609 | N/A | ⓘTags: Joke 1609 | April Fools' 2021 (0rang3) | Batch | 482 |
| colorgraph | N/A | ⓘTags: Graph Theory colorgraph | uwu (errorgorn) | Batch | 21 |
| latex | N/A | ⓘTags: Data Structures, Dynamic Programming latex | RI Deccourse 2018 Selection Test | Batch | 11 |
| acorns | N/A | ⓘTags: Data Structures acorns | MCO 2016 | Batch | 27 |
| lppfnlcst2 | N/A | ⓘTags: Data Structures Lazy Propogation Persistant Fat Nodes Li Chao Segment Tree 2 | Classic Problem (errorgorn) | Batch | 8 |
| efficientdelivery | N/A | ⓘTags: Adhoc, Brute Force efficientdelivery | UWCOI 2021 | Batch | 15 |
| yabbitmeetup | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees yabbitmeetup | HCI NOI Selection Retest 2020 (bensonlzl) | Batch | 11 |
| mememagic | N/A | ⓘTags: Dynamic Programming mememagic | Dunjudge Archive | Batch | 26 |
| train_ex | N/A | ⓘTags: Dynamic Programming train_ex | Dunjudge Archive | Batch | 55 |
| train | N/A | ⓘTags: Dynamic Programming train | Dunjudge archive | Batch | 140 |
| commando | N/A | ⓘTags: Data Structures, Dynamic Programming commando | APIO 2010 | Batch | 103 |
| foolpruf | N/A | ⓘTags: Data Structures, Graph Theory, Greedy Foolprüf Security | NERC 2019 | Batch | 4 |
| supperbox | N/A | ⓘTags: Divide and Conquer, Dynamic Programming Estelle’s Supper Box | RI-HCI NOI Selection Test 2018 | Batch | 87 |
| catgameshow | N/A | ⓘTags: Data Structures catgameshow | RI/RJC NOI Selection Test 2016 | Batch | 18 |
| guards | N/A | ⓘTags: Divide and Conquer, Dynamic Programming Guards | Hackerrank IOI 2014 Practice Contest 2 | Batch | 75 |
| truck | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Math, Trees truck | NOI 2021 Qualification (huajun) | Batch | 37 |
| departure | N/A | ⓘTags: Data Structures, Greedy departure | NOI 2021 Qualification | Batch | 24 |
| competition | N/A | ⓘTags: Greedy competition | NOI 2021 Qualification | Batch | 649 |
| bracketcount | N/A | ⓘTags: Dynamic Programming, Explicitly Excluded (from IOI) bracketcount | Valentines Contest 2021 (errorgorn) | Batch | 4 |
| dahliahostels | N/A | ⓘTags: Dynamic Programming, Math dahliahostels | Valentines Contest 2021 (errorgorn) | Batch | 5 |
| ducknuggetconvention | N/A | ⓘTags: Data Structures, Divide and Conquer Duck Nugget Convention | Valentines Contest 2021 (oolimry) | Batch | 44 |
| trivialmaths | N/A | ⓘTags: Explicitly Excluded (from IOI), Math trivialmaths | Valentines Contest 2021 (errorgorn) | Interactive | 32 |
| catteams | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming catteams | RI/RJC NOI Selection Test 2016 | Batch | 35 |
| rarsum | N/A | ⓘTags: Dynamic Programming rarsum | Raffles Cat Helping Contest 2013 | Batch | 53 |
| rarwall | N/A | ⓘTags: Data Structures rarwall | Dunjudge Archive | Interactive | 23 |
| troubles | N/A | ⓘTags: Adhoc, Data Structures, Dynamic Programming troubles | Dunjudge Archive | Batch | 47 |
| snakesnack2 | N/A | ⓘTags: Line Sweep/Sliding Window snakesnack2 | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch | 51 |
| rebuild | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Greedy Rebuilding Bunnyland | RI-HCI-NUSH NOI Selection Test 2021 (shenxy13) | Interactive | 19 |
| fertile | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming fertile | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch | 26 |
| bunnyscore | N/A | ⓘTags: Adhoc, Data Structures bunnyscore | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Interactive | 43 |
| armpit | N/A | ⓘTags: Adhoc armpit | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch | 58 |
| construct | N/A | ⓘTags: Dynamic Programming, Graph Theory Constructing Birthday Presents | RI-HCI-NUSH NOI Selection Test 2021 (0rang3) | Batch | 84 |
| bucketstacking | N/A | ⓘTags: Adhoc, Greedy Bucket Stacking | RI-HCI-NUSH NOI Selection Test 2021 (oolimry) | Batch | 39 |
| swimming | N/A | ⓘTags: Graph Theory Constructing a Swimming Pool | RI-HCI-NUSH NOI Selection Test 2021 (0rang3) | Batch | 56 |
| wabbit | N/A | ⓘTags: Greedy wabbit | RI-HCI-NUSH NOI Selection Test 2021 (oolimry) | Batch | 139 |
| fencing | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window, Square Root Decomposition Fencing | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch | 33 |
| magick | N/A | ⓘTags: Adhoc, Information Theory, Math Magick | RI-HCI NOI Selection Test 2019 | Communication | 18 |
| combo | N/A | ⓘTags: Adhoc Combo | IOI 2018 | Interactive | 57 |
| werewolf | N/A | ⓘTags: Data Structures, Graph Theory, Trees Werewolf | IOI 2018 | Interactive | 17 |
| nian | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Nian | 2020 CNY (oolimry) | Batch | 33 |
| summarising2020 | N/A | ⓘTags: Information Theory, Joke Summarising 2020 | Hello 2021 (shenxy13) | Interactive | 89 |
| hashcollision | N/A | ⓘTags: Joke Hash Collision | Hello 2021 (shenxy13) | Interactive | 146 |
| samelength | N/A | ⓘTags: Joke Same Length | Hello 2021 (errorgorn) | Batch | 87 |
| holdinghands | N/A | ⓘTags: Graph Theory, Trees holdinghands | Dec Course 2020 BAPS (jiahng) | Batch | 14 |
| quillvsowl | N/A | ⓘTags: Adhoc, Line Sweep/Sliding Window Quill Vs Owl | Dec Course 2020 BAPS (jamielim) | Batch | 69 |
| dna | N/A | ⓘTags: Dynamic Programming DNA | APIO 2008 | Batch | 35 |
| girlfriend | N/A | ⓘTags: Dynamic Programming, Graph Theory girlfriend | Dunjudge Archive | Batch | 53 |
| tour | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory tour | NOI 2011 | Batch | 36 |
| variety | N/A | ⓘTags: Dynamic Programming variety | RI November Course Stage 2 Selection Test 2019 | Batch | 80 |
| appletree | N/A | ⓘTags: Graph Theory appletree | Dunjudge Archive | Batch | 44 |
| bananafever | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees bananafever | Dunjudge Archive | Batch | 31 |
| delivery | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory delivery | Dunjudge Archive | Batch | 23 |
| graphcraft | N/A | ⓘTags: Graph Theory graphcraft | Dunjudge Archive | Interactive | 87 |
| numbers | N/A | ⓘTags: Dynamic Programming Palindrome-Free Numbers | BOI 2013 | Batch | 77 |
| assembly | N/A | ⓘTags: Dynamic Programming assembly | Dunjudge Archive | Batch | 117 |
| lazycat | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory lazycat | NOI 2009 | Batch | 48 |
| makemst | N/A | ⓘTags: Graph Theory, Math makemst | Codeforces 1088F | Batch | 20 |
| haiku | N/A | ⓘTags: Dynamic Programming Iroha and Haiku | AtCoder | Batch | 12 |
| padoru | N/A | ⓘTags: Graph Theory Hashire Sori Yo! | Dec Course 2020 BAPS (peaceknight05) | Batch | 92 |
| bracketflip | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window, Math bracketflip | Dec Course 2020 BAPS (pavement) | Batch | 17 |
| split | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Trees Split the Attractions | IOI 2019 (Day 1) | Interactive | 6 |
| village | N/A | ⓘTags: Graph Theory, Greedy, Trees village | BOI 2020 | Batch | 26 |
| monochromecat | N/A | ⓘTags: Graph Theory, Trees monochromecat | ARC 097 | Batch | 25 |
| invasion | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Line Sweep/Sliding Window, Trees invasion | Dunjudge Archive | Batch | 26 |
| multipaths | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Multiple Paths | Dunjudge Archive | Batch | 47 |
| oranges2 | N/A | ⓘTags: Graph Theory, Trees oranges2 | RI Deccourse 2018 Selection Test (0rang3) | Batch | 170 |
| railway | N/A | ⓘTags: Graph Theory, Trees railway | CPSPC 2004 | Batch | 159 |
| ancestor | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees ancestor | Classic problem | Batch | 259 |
| employee | N/A | ⓘTags: Graph Theory, Trees employee | Dunjudge Archive | Batch | 146 |
| countingagain | N/A | ⓘTags: Dynamic Programming, Math Counting Again | ARC 104D | Batch | 35 |
| localexpress | N/A | ⓘTags: Dynamic Programming localexpress | AtCoder Typical DP Contest | Batch | 116 |
| towers | N/A | ⓘTags: Data Structures, Dynamic Programming towers | Codeforces 474E | Batch | 96 |
| snowcow | N/A | ⓘTags: Data Structures, Graph Theory, Trees Snowcow | USACO 2019 December Contest Platinum | Batch | 47 |
| guessarray | N/A | ⓘTags: Adhoc 4sadfaces Guessing an Array | Dec Course 2020 BAPS (zaneyu) | Interactive | 33 |
| ants | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees ants | Dunjudge Archive | Interactive | 39 |
| smurfpaths | N/A | ⓘTags: Data Structures, Graph Theory, Trees smurfpaths | RI-HCI NOI Selection Test 2020 (rs) | Batch | 137 |
| payraise | N/A | ⓘTags: Graph Theory, Trees payraise | Dunjudge Archive | Batch | 220 |
| selectingintervals | N/A | ⓘTags: Binary Search, Dynamic Programming selectingintervals | Codeforces 1055E | Batch | 38 |
| globalwarming_ceoi | N/A | ⓘTags: Data Structures, Dynamic Programming Global warming | CEOI 2018 | Batch | 35 |
| orchard | N/A | ⓘTags: Dynamic Programming, Line Sweep/Sliding Window orchard | NOI 2014 | Batch | 127 |
| installingapps | N/A | ⓘTags: Dynamic Programming, Greedy Installing Apps | NWERC 2017 | Batch | 59 |
| christmaswall | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Christmas Wall | Educational Round 2 (maomao90) | Batch | 10 |
| duckduckgo | N/A | ⓘTags: Greedy duckduckgo | Codeforces 1091F | Batch | 44 |
| visitingsingapore | N/A | ⓘTags: Dynamic Programming Visiting Singapore | NOI 2020 Prelims | Batch | 34 |
| llis | N/A | ⓘTags: Dynamic Programming Longest LIS | NUSH NOI Selection Test 2018 | Batch | 62 |
| election | N/A | ⓘTags: Data Structures, Dynamic Programming election | Dunjudge Archive | Batch | 55 |
| modules | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming, Line Sweep/Sliding Window modules | NUSH NOI Selection Test 2018 | Batch | 58 |
| 4russians | N/A | ⓘTags: Dynamic Programming 4russians | RI-HCI NOI Selection Test 2020 (jamielim) | Batch | 154 |
| nis | N/A | ⓘTags: Data Structures, Dynamic Programming nis | Dunjudge Archive | Batch | 131 |
| stamps | N/A | ⓘTags: Dynamic Programming stamps | Dunjudge Archive | Batch | 132 |
| assignpaths | N/A | ⓘTags: Binary Search, Graph Theory, Greedy, Trees assignpaths | USACO 2020 February Contest, Platinum | Batch | 34 |
| manycolours | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees manycolours | ABC 133F | Batch | 60 |
| merchant_o | N/A | ⓘTags: Dynamic Programming, Slope Trick Merchant Otter | Dec Course 2020 BAPS (myrcella) | Batch | 37 |
| arrayproblem | N/A | ⓘTags: Greedy arrayproblem | Codeforces | Batch | 187 |
| cheerleaders | N/A | ⓘTags: Dynamic Programming cheerleaders | Atcoder Educational DP Contest | Batch | 77 |
| snakesnack | N/A | ⓘTags: Dynamic Programming, Greedy snakesnack | Codeforces 1239E | Batch | 33 |
| neckties | N/A | ⓘTags: Data Structures, Greedy Just Long Neckties | JOI 2020 Final Round | Batch | 144 |
| laughter | N/A | ⓘTags: Binary Search, Data Structures, Line Sweep/Sliding Window laughter | Educational Codeforces Round 27 | Batch | 33 |
| smurfberries | N/A | ⓘTags: Binary Search smurfberries | All-Ukrainian School Olympiad in Informatics 2011 | Batch | 30 |
| smallprimes_ex | N/A | ⓘTags: Meet in the Middle Small Primes? | Classic Problem? | Batch | 60 |
| removeedges | N/A | ⓘTags: Graph Theory removeedges | Atcoder | Batch | 35 |
| bichrome | N/A | ⓘTags: Graph Theory, Math, Trees bichrome | Atcoder | Batch | 20 |
| funnytree | N/A | ⓘTags: Graph Theory, Trees Funny Tree (Extreme Version) | RuCode 2020 Div A (Extreme Version) (0rang3, rs) | Batch | 12 |
| christmasturkeyfarm | N/A | ⓘTags: Data Structures Christmas Turkey Farming | Educational Round 2 (dillion) | Batch | 23 |
| christmastree | N/A | ⓘTags: Graph Theory, Trees Christmas Tree | Educational Round 2 (errorgorn, oolimry) | Batch | 19 |
| pairs | N/A | ⓘTags: Binary Search pairs | ABC 155 | Batch | 86 |
| christmasfiboseq | N/A | ⓘTags: Math Chirstmas Fibonacci Sequence | Educational Round 2 (errorgorn) | Batch | 11 |
| candies_joi | N/A | ⓘTags: Adhoc, Greedy candies_joi | JOI 2017/2018 Spring Camp | Batch | 50 |
| blocks | N/A | ⓘTags: Information Theory, Math Blocks | UWCOI 2020 (socho, astoria, kimbj0709) | Interactive | 7 |
| books | N/A | ⓘTags: Graph Theory, Greedy Ancient Books | IOI 2017 | Interactive | 14 |
| escape | N/A | ⓘTags: Bitmask, Brute Force, Graph Theory Escape | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 14 |
| naan | N/A | ⓘTags: Greedy, Math naan | JOI 2018/2019 Spring Camp | Batch | 34 |
| baseplans | N/A | ⓘTags: Adhoc Base Plans | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 42 |
| merchant | N/A | ⓘTags: Binary Search, Dynamic Programming, Graph Theory Travelling Merchant | APIO 2017 | Batch | 35 |
| runway | N/A | ⓘTags: Binary Search, Graph Theory Jianzhi’s Runway Show | RI NOI Selection Test 2017 | Batch | 129 |
| rabbitlineup | N/A | ⓘTags: Divide and Conquer, Dynamic Programming rabbitlineup | Codeforces 1105C (Buffed) | Batch | 16 |
| globalwarming | N/A | ⓘTags: Line Sweep/Sliding Window Global Warming | NOI 2013 | Batch | 264 |
| justright | N/A | ⓘTags: Binary Search justright | Dunjudge Archive | Batch | 151 |
| lunchcombo | N/A | ⓘTags: Binary Search, Greedy lunchcombo | RI November Course Stage 2 Selection Test 2019 | Batch | 113 |
| rubies | N/A | ⓘTags: Binary Search rubies | Dunjudge Archive (pwypeanut) | Batch | 70 |
| summit | N/A | ⓘTags: Binary Search summit | Dunjudge Archive | Batch | 318 |
| nonboringsequences | N/A | ⓘTags: Divide and Conquer nonboringsequences | Dunjudge Archive | Batch | 67 |
| ljubomora | N/A | ⓘTags: Binary Search ljubomora | COCI 2012/2013 | Batch | 431 |
| inversions | N/A | ⓘTags: Data Structures, Divide and Conquer inversions | Dunjudge Archive | Batch | 169 |
| fuel | N/A | ⓘTags: Greedy fuel | Dunjudge Archive | Batch | 299 |
| harddisk | N/A | ⓘTags: Bitmask, Brute Force, Meet in the Middle harddisk | 2015 NOI Training Problem-Setter Contest | Batch | 127 |
| catfight | N/A | ⓘTags: Line Sweep/Sliding Window catfight | Dunjudge Archive | Batch | 609 |
| bobek | N/A | ⓘTags: Bitmask, Meet in the Middle bobek | CEOI 2015 | Batch | 160 |
| 4sum | N/A | ⓘTags: Meet in the Middle 4sum | NOI 2008 | Batch | 410 |
| flamethrower | N/A | ⓘTags: Brute Force Flame Thrower | Dunjudge Archive | Batch | 1423 |
| candymountain_ex | N/A | ⓘTags: Data Structures, Dynamic Programming candymountain_ex | Dunjudge Archive | Batch | 318 |
| christmasfeast | N/A | ⓘTags: Adhoc Christmas Feast | Educational Round 2 (errorgorn) | Batch | 88 |
| baseplans_ex | N/A | ⓘTags: Data Structures baseplans_ex | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 30 |
| omnomnom2 | N/A | ⓘTags: Graph Theory, Trees omnomnom2 | Classic Problem | Batch | 185 |
| toll | N/A | ⓘTags: Data Structures, Dynamic Programming toll | BOI 2017 | Batch | 40 |
| lcm | N/A | ⓘTags: Math lcm | Classic Problem | Batch | 365 |
| segmenttree2 | N/A | ⓘTags: Data Structures Segment Tree 2 | Classic Problem | Batch | 300 |
| omnomnom | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees omnomnom | Classic Problem | Batch | 286 |
| replacedigits | N/A | ⓘTags: Data Structures Replace Digits | ACL Beginner Contest | Batch | 99 |
| ragingthunder | N/A | ⓘTags: Data Structures Raging Thunder | Codeforces | Batch | 16 |
| goodsubsegments | N/A | ⓘTags: Data Structures goodsubsegments | Codeforces Round #493 (Div. 1) | Batch | 8 |
| fire | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window fire | JOI 2020 Final Round | Batch | 14 |
| garaza | N/A | ⓘTags: Data Structures, Math garaza | COCI | Batch | 11 |
| collaboration | N/A | ⓘTags: Data Structures, Graph Theory, Trees Collaboration | December Course 2019 Advanced Final Contest (0rang3) | Interactive | 22 |
| optimalsubseq | N/A | ⓘTags: Binary Search, Data Structures optimalsubseq | Codeforces 1227D2 | Batch | 61 |
| sightseeing2 | N/A | ⓘTags: Graph Theory, Trees sightseeing2 | RI NOI Selection Test 2015 | Batch | 103 |
| examinations | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window examinations | JOI | Batch | 74 |
| bacteria | N/A | ⓘTags: Data Structures bacteria | Dunjudge Archive | Batch | 83 |
| sherlockinversions | N/A | ⓘTags: Data Structures, Square Root Decomposition sherlockinversions | Dunjudge Archive | Batch | 79 |
| timeleap | N/A | ⓘTags: Data Structures timeleap | JOI | Batch | 8 |
| streetlamps | N/A | ⓘTags: Data Structures, Divide and Conquer Street Lamps | APIO 2019 | Batch | 19 |
| sterilizing | N/A | ⓘTags: Data Structures sterilizing | JOI 2014/15 | Batch | 68 |
| ohbabyntriples | N/A | ⓘTags: Binary Search, Data Structures, Greedy Oh Baby, n Triples! | IOI 2020 Practice Session | Batch | 14 |
| collectmushrooms5 | N/A | ⓘTags: Greedy collectmushrooms5 | Dunjudge Archive | Batch | 40 |
| collectmushrooms4 | N/A | ⓘTags: Data Structures, Dynamic Programming collectmushrooms4 | Dunjudge Archive | Batch | 40 |
| collectmushrooms3 | N/A | ⓘTags: Data Structures collectmushrooms3 | Dunjudge Archive | Batch | 94 |
| collectmushrooms | N/A | ⓘTags: Syntax collectmushrooms | Dunjudge Archive | Batch | 200 |
| sortbooks | N/A | ⓘTags: Data Structures sortbooks | IZhO 2019 | Batch | 57 |
| poklon | N/A | ⓘTags: Data Structures, Square Root Decomposition poklon | COCI 2016/2017 | Batch | 110 |
| cake | N/A | ⓘTags: Brute Force, Data Structures cake | CEOI 2014 | Batch | 48 |
| flights | N/A | ⓘTags: Graph Theory flights | Dunjudge Archive | Batch | 75 |
| simp | N/A | ⓘTags: Adhoc, Brute Force Simp | Codeforces 1033A | Batch | 729 |
| trains_mco | N/A | ⓘTags: Graph Theory, Greedy trains_mco | MCO 2015 | Batch | 14 |
| removeelements | N/A | ⓘTags: Binary Search, Data Structures removeelements | Codeforces Round #668 | Batch | 34 |
| fortunetelling | N/A | ⓘTags: Data Structures Fortune Telling 2 | JOI 2014 | Batch | 47 |
| ferries | N/A | ⓘTags: Graph Theory ferries | NOI 2013 | Batch | 53 |
| inheritance | N/A | ⓘTags: Binary Search, Graph Theory inheritance | JOI 2014/2015 | Batch | 101 |
| rblock | N/A | ⓘTags: Graph Theory rblock | USACO 2011 December Contest, Silver Division | Batch | 91 |
| towerdefense | N/A | ⓘTags: Graph Theory towerdefense | Dunjudge Archive | Batch | 85 |
| boundlessboxes | N/A | ⓘTags: Graph Theory boundlessboxes | Dunjudge Archive | Batch | 248 |
| snakenladder | N/A | ⓘTags: Dynamic Programming snakenladder | Dunjudge Archive | Batch | 87 |
| universe | N/A | ⓘTags: Graph Theory, Trees universe | Dunjudge Archive | Batch | 245 |
| subgraphs | N/A | ⓘTags: Graph Theory Subgraphs | Dunjudge Archive | Batch | 646 |
| splithunny | N/A | ⓘTags: Graph Theory splithunny | Dunjudge Archive | Batch | 608 |
| magicwand | N/A | ⓘTags: Graph Theory magicwand | Dunjudge Archive | Batch | 246 |
| milkweed | N/A | ⓘTags: Graph Theory milkweed | Dunjudge Archive | Batch | 415 |
| adjmatrix | N/A | ⓘTags: Graph Theory Adjacency Matrix | Dunjudge Archive | Batch | 1107 |
| adjlist | N/A | ⓘTags: Graph Theory Adjacency List | Dunjudge Archive | Batch | 993 |
| dijkstra | N/A | ⓘTags: Graph Theory dijkstra | Dunjudge Archive | Batch | 496 |
| bracketsuperseq | N/A | ⓘTags: Dynamic Programming Shortest Bracket Supersequence | Codeforces 1272F | Batch | 41 |
| beautifulbrackets | N/A | ⓘTags: Dynamic Programming Beautiful Bracket Sequence | Codeforces 1264D1 | Batch | 35 |
| fractionalmultiset | N/A | ⓘTags: Dynamic Programming Fractional Multiset | ARC 107 | Batch | 47 |
| hedgehogcrimes_easy | N/A | ⓘTags: Dynamic Programming Hedgehog Crimes (Easy Version) | Classic Problem | Batch | 205 |
| unmerge | N/A | ⓘTags: Dynamic Programming Unmerge | Codeforces 1381B | Batch | 72 |
| infiniteloop | N/A | ⓘTags: Graph Theory Infinite Looping Sequence | 2017 RI Dec Course Sel (pwypeanut) | Batch | 25 |
| arrangetoys | N/A | ⓘTags: Graph Theory, Math Arranging Toy Displays | AGC 016D | Batch | 29 |
| catchingcheaters | N/A | ⓘTags: Dynamic Programming Catching Cheaters | Codeforces Round 683 (Div 1) | Batch | 65 |
| subknapsack | N/A | ⓘTags: Dynamic Programming Knapsack for All Subsets | Atcoder Beginner Contest 169 | Batch | 54 |
| moosic | N/A | ⓘTags: Data Structures moosic | Codeforces Round #386 | Batch | 31 |
| conversations | N/A | ⓘTags: Data Structures Zookeeper's Conversations | Singapore Zoo (shenxy13) | Batch | 125 |
| berlandtaxi | N/A | ⓘTags: Data Structures Berland.Taxi | NEERC 2017 Southern Subregional Contest | Batch | 23 |
| frogs | N/A | ⓘTags: Syntax Frogs | Winter Computer School 2010/11 Team Contest #1 | Batch | 286 |
| smallprimes | N/A | ⓘTags: Brute Force, Math Small Primes | Classic Problem | Batch | 132 |
| beareatrabbit | N/A | ⓘTags: Dynamic Programming Bear Eat Rabbit | Classic Problem | Batch | 570 |
| fibo | N/A | ⓘTags: Dynamic Programming, Math Fibonacci | Classic Problem | Batch | 1476 |
| mercurypoisoning | N/A | ⓘTags: Graph Theory Mercury Poisoning | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 31 |
| pairsums | N/A | ⓘTags: Syntax Button Pairs | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 676 |
| peakfinding | N/A | ⓘTags: Syntax Peak Finding | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 456 |
| mountains | N/A | ⓘTags: Data Structures Mountains | NOI 2020 Prelims (feeder) | Batch | 253 |
| snapknack | N/A | ⓘTags: Dynamic Programming snapknack | Dunjudge Archive | Batch | 65 |
| rabbiteatrabbit | N/A | ⓘTags: Dynamic Programming rabbiteatrabbit | Dec Trg 2019 (Elementary) (jamielim) | Batch | 174 |
| trains | N/A | ⓘTags: Dynamic Programming trains | Dunjudge Archive | Batch | 282 |
| walking | N/A | ⓘTags: Dynamic Programming walking | NOI 2012 | Batch | 88 |
| lis_easy | N/A | ⓘTags: Dynamic Programming lis_easy | Classic problem | Batch | 888 |
| moneychanger | N/A | ⓘTags: Dynamic Programming moneychanger | Dunjudge Archive | Batch | 558 |
| speakers | N/A | ⓘTags: Greedy speakers | Dunjudge Archive | Batch | 221 |
| routers | N/A | ⓘTags: Greedy routers | Dunjudge Archive | Batch | 150 |
| pandaeyes | N/A | ⓘTags: Greedy pandaeyes | Dunjudge Archive | Batch | 412 |
| blanko | N/A | ⓘTags: Data Structures, Greedy blanko | Dunjudge Archive | Batch | 38 |
| weddingcoins | N/A | ⓘTags: Greedy weddingcoins | Dunjudge Archive | Batch | 771 |
| numericalstrings | N/A | ⓘTags: Greedy, Math numericalstrings | RI November Course Stage 2 Selection Test 2019 | Batch | 85 |
| binarycoins | N/A | ⓘTags: Bitmask, Greedy, Syntax binarycoins | Dunjudge Archive | Batch | 631 |
| lemonadestand | N/A | ⓘTags: Greedy lemonadestand | Dunjudge Archive | Batch | 30 |
| change | N/A | ⓘTags: Greedy change | NOI 2011 | Batch | 63 |
| lopov | N/A | ⓘTags: Data Structures lopov | COCI 2013/2014 | Batch | 22 |
| bridge_apio15 | N/A | ⓘTags: Data Structures Palembang Bridges | APIO 2015 | Batch | 45 |
| ballgame | N/A | ⓘTags: Data Structures, Dynamic Programming ballgame | Dunjudge Archive | Interactive | 70 |
| optmilk | N/A | ⓘTags: Data Structures, Dynamic Programming Optimal Milking | Dunjudge Archive | Batch | 124 |
| clique | N/A | ⓘTags: Data Structures clique | Algorithm Class Mini-Contest 8 | Batch | 107 |
| jams | N/A | ⓘTags: Data Structures Jams | Algorithm Class Mini-Contest 8 | Batch | 35 |
| penguinfood | N/A | ⓘTags: Data Structures penguinfood | Dunjudge Archive | Batch | 113 |
| illuminate | N/A | ⓘTags: Math, Syntax Illuminate | RI-HCI NOI Selection Test 2020 (bensonlzl) | Batch | 272 |
| wabot | N/A | ⓘTags: Greedy wabot | December Course 2019 Advanced Final Contest (bensonlzl) | Batch | 359 |
| boxispull | N/A | ⓘTags: Adhoc, Syntax Box is Pull | Codeforces Raif Round 1 (bensonlzl) | Batch | 1009 |
| artswap | N/A | ⓘTags: Data Structures artswap | HCI NOI Selection Retest 2020 (bensonlzl) | Interactive | 28 |
| smurf | N/A | ⓘTags: Brute Force, Syntax smurf | RI Deccourse 2018 Selection Test (tch1001) | Batch | 894 |
| paint_apio | N/A | ⓘTags: Adhoc, Line Sweep/Sliding Window, Square Root Decomposition paint_apio | APIO 2020 | Interactive | 20 |
| swap | N/A | ⓘTags: Graph Theory, Trees Swapping Cities | APIO 2020 | Interactive | 32 |
| fun | N/A | ⓘTags: Adhoc, Graph Theory, Information Theory, Joke, Trees Fun Tour | APIO 2020 | Interactive | 12 |
| bracketex | N/A | ⓘTags: Data Structures, Syntax bracketex | Dunjudge Archive | Batch | 829 |
| lineup | N/A | ⓘTags: Line Sweep/Sliding Window lineup | USACO Silver Nov 2011 | Batch | 351 |
| poi | N/A | ⓘTags: Syntax poi | IOI 2009 | Batch | 192 |
| catlunch | N/A | ⓘTags: Data Structures, Greedy catlunch | RI/RJC NOI Selection Test 2016 | Batch | 595 |
| ccs | N/A | ⓘTags: Binary Search, Data Structures ccs | Dunjudge Archive | Batch | 548 |
| medianheap | N/A | ⓘTags: Data Structures medianheap | Dunjudge Archive | Batch | 311 |
| supermarket | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window supermarket | RI Dec Course Sel 2017 | Batch | 87 |
| lengthsort | N/A | ⓘTags: Syntax lengthsort | Dunjudge Archive | Batch | 765 |
| arrayfind | N/A | ⓘTags: Binary Search arrayfind | Dunjudge Archive | Batch | 692 |
| contestcalc | N/A | ⓘTags: Math, Syntax contestcalc | Dunjudge Archive | Batch | 878 |
| lvm | N/A | ⓘTags: Brute Force, Data Structures lvm | NOI 2008 | Batch | 500 |
| brick | N/A | ⓘTags: Data Structures brick | Dunjudge Archive | Batch | 1093 |
| guanine | N/A | ⓘTags: Data Structures guanine | Dunjudge Archive | Batch | 695 |
| puttingstrings | N/A | ⓘTags: Constructive Algorithms, Graph Theory puttingstrings | RI-HCI December Course Selection 2020 (rs) | Batch | 37 |
| springtrap | N/A | ⓘTags: Data Structures springtrap | Educational Round 1 (bensonlzl) | Batch | 7 |
| lppfnlcst | N/A | ⓘTags: Binary Search, Data Structures Lazy Propagation Persistant Fat Nodes Li Chao Segment Tree | Educational Round 1 (errorgorn) | Batch | 39 |
| lemmas | N/A | ⓘTags: Graph Theory lemmas | Educational Round 1 (errorgorn) | Batch | 50 |
| spaceinvaders | N/A | ⓘTags: Brute Force, Data Structures, Dynamic Programming, Line Sweep/Sliding Window spaceinvaders | Educational Round 1 (bensonlzl) | Batch | 50 |
| seats | N/A | ⓘTags: Data Structures Seats | IOI 2018 | Interactive | 8 |
| divsum | N/A | ⓘTags: Math Divisor Sum | Educational Round 1 (errorgorn) | Batch | 24 |
| cakerun | N/A | ⓘTags: Data Structures Bowen's Cake Run | December Course 2019 Advanced Final Contest (rs) | Batch | 43 |
| messy | N/A | ⓘTags: Binary Search Unscrambling a Messy Bug | IOI 2016 | Interactive | 10 |
| maximum | N/A | ⓘTags: Syntax Maximum | Dunjudge Archive | Batch | 2212 |
| sumint | N/A | ⓘTags: Syntax Sum of Integers | Dunjudge Archive | Batch | 2328 |
| segmenttree | N/A | ⓘTags: Data Structures Segment Tree | Classic problem | Batch | 490 |
| naptime | N/A | ⓘTags: Graph Theory, Greedy naptime | RI-HCI December Course Selection 2020 (cstuart) | Batch | 48 |
| conversations_easy | N/A | ⓘTags: Data Structures Zookeeper's Conversations (Easy Version) | RI-HCI December Course Selection 2020 (shenxy13) | Batch | 187 |
| interestring | N/A | ⓘTags: Dynamic Programming, Math interestring | RI-HCI December Course Selection 2020 (cstuart) | Batch | 22 |
| square_ioi | N/A | ⓘTags: Dynamic Programming square_ioi | IOI 2014 Practice | Interactive | 50 |
| tickets | N/A | ⓘTags: Adhoc, Data Structures Carnival Tickets | IOI 2020 (Day 1) | Interactive | 21 |
| horses | N/A | ⓘTags: Data Structures, Math horses | IOI 2015 | Interactive | 35 |
| fencing2 | N/A | ⓘTags: Data Structures fencing2 | RI-HCI December Course Selection 2020 (errorgorn) | Batch | 8 |
| xorb | N/A | ⓘTags: Math, Syntax xorb | Dunjudge Archive | Batch | 70 |
| fruitsequences | N/A | ⓘTags: Adhoc, Data Structures Fruit Sequences | Codeforces Raif Round 1 (bensonlzl) | Batch | 71 |
| bracketscore | N/A | ⓘTags: Greedy bracketscore | AGC 48 | Batch | 59 |
| growingtrees | N/A | ⓘTags: Binary Search, Data Structures growingtrees | BOI 2011 | Batch | 45 |
| singlefile | N/A | ⓘTags: Data Structures singlefile | Dunjudge Archive | Batch | 90 |
| taxcollection | N/A | ⓘTags: Greedy, Syntax taxcollection | RI-HCI December Course Selection 2020 (JustAWallaby) | Batch | 222 |
| entropy | N/A | ⓘTags: Greedy, Line Sweep/Sliding Window, Syntax entropy | RI-HCI December Course Selection 2020 (0rang3) | Batch | 199 |
| applefarm | N/A | ⓘTags: Graph Theory applefarm | NUSH ISC 2020 (oolimry) | Batch | 103 |
| basketball | N/A | ⓘTags: Binary Search, Greedy basketball | NUSH ISC 2020 (dantoh) | Batch | 82 |
| coke | N/A | ⓘTags: Dynamic Programming, Greedy Coke | NUSH ISC 2020 (errorgorn) | Batch | 142 |
| ljll | N/A | ⓘTags: Math LJLL | NUSH ISC 2020 (errorgorn) | Batch | 77 |
| performance | N/A | ⓘTags: Math Performance | NUSH ISC 2020 (oolimry) | Batch | 82 |
| ping | N/A | ⓘTags: Syntax ping | RI HCI NOI Selection 2019 Practice (bensonlzl) | Interactive | 180 |
| safety | N/A | ⓘTags: Dynamic Programming, Slope Trick Safety | NOI 2018 | Batch | 44 |
| aesthetic | N/A | ⓘTags: Binary Search, Data Structures, Graph Theory aesthetic | NOI 2020 Finals (jeff_) | Batch | 21 |
| arcade | N/A | ⓘTags: Adhoc, Data Structures, Dynamic Programming arcade | NOI 2020 Finals (pwypeanut) | Batch | 43 |
| progression | N/A | ⓘTags: Data Structures progression | NOI 2020 Finals (Damian) | Batch | 54 |
| discharging | N/A | ⓘTags: Data Structures, Dynamic Programming discharging | NOI 2020 Finals (huajun) | Batch | 89 |
| labels | N/A | ⓘTags: Adhoc labels | NOI 2020 Finals (Damian) | Batch | 267 |
| biscuits | N/A | ⓘTags: Dynamic Programming, Math Packing Biscuits | IOI 2020 (Day 2) | Interactive | 16 |
| pandaski | N/A | ⓘTags: Data Structures, Dynamic Programming pandaski | NOI 2016 | Batch | 21 |
| rockclimbing | N/A | ⓘTags: Graph Theory rockclimbing | NOI 2016 | Batch | 18 |
| fabric | N/A | ⓘTags: Data Structures, Dynamic Programming fabric | NOI 2016 | Batch | 19 |
| pokemonmaster | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Square Root Decomposition, Trees I want to be the very best too! | NOI 2017 | Batch | 15 |
| mergecards | N/A | ⓘTags: Adhoc, Dynamic Programming Merge Cards | Google Kick Start 2020 Round G | Batch | 5 |
| exponentiate_ex | N/A | ⓘTags: Math exponentiate_ex | Classic Problem | Batch | 123 |
| carrots | N/A | ⓘTags: Greedy carrots | Codeforces Raif Round 1 (errorgorn) | Batch | 148 |
| abbb | N/A | ⓘTags: Greedy abbb | Codeforces Raif Round 1 (errorgorn) | Batch | 155 |
| firefighting | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees firefighting | NOI 2020 Qualification | Batch | 61 |
| relaymarathon | N/A | ⓘTags: Brute Force, Graph Theory relaymarathon | NOI 2020 Qualification | Batch | 48 |
| fuelstation | N/A | ⓘTags: Data Structures fuelstation | NOI 2020 Qualification (feeder) | Batch | 63 |
| crypto | N/A | ⓘTags: Data Structures crypto | NOI 2020 Qualification (Damian) | Batch | 128 |
| rmq | N/A | ⓘTags: Data Structures, Greedy rmq | NOI 2017 | Batch | 45 |
| hotspot | N/A | ⓘTags: Graph Theory hotspot | NOI 2017 | Batch | 33 |
| boomerangs | N/A | ⓘTags: Adhoc Bouncing Boomerangs | Codeforces Raif Round 1 (bensonlzl) | Batch | 9 |
| riggedroads | N/A | ⓘTags: Graph Theory, Greedy, Trees riggedroads | NOI 2019 (pwypeanut) | Batch | 61 |
| feast | N/A | ⓘTags: Binary Search, Dynamic Programming, Greedy feast | NOI 2019 (guangxuan) | Batch | 95 |
| lasers | N/A | ⓘTags: Adhoc, Data Structures lasers | NOI 2019 | Batch | 98 |
| pilot | N/A | ⓘTags: Adhoc, Data Structures pilot | NOI 2019 (pwypeanut) | Batch | 174 |
| charges | N/A | ⓘTags: Graph Theory Experimental Charges | NOI 2019 Prelims (ranaldlys) | Batch | 147 |
| lightningrod | N/A | ⓘTags: Adhoc, Data Structures LightningRod | NOI 2018 (guangxuan) | Batch | 257 |
| journey3 | N/A | ⓘTags: Dynamic Programming Journey | NOI 2018 | Batch | 70 |
| knapsack | N/A | ⓘTags: Dynamic Programming Knapsack | NOI 2018 Prelims | Batch | 118 |
| plagia | N/A | ⓘTags: Data Structures, Syntax plagia | December Course 2018 Advanced Final Contest | Batch | 49 |
| collectmushrooms2 | N/A | ⓘTags: Data Structures collectmushrooms2 | Dunjudge Archive | Batch | 161 |
| appeal | N/A | ⓘTags: Data Structures appeal | Dunjudge Archive | Batch | 49 |
| fenwicktree | N/A | ⓘTags: Data Structures fenwicktree | Classic Problem | Batch | 268 |
| rotarylock | N/A | ⓘTags: Data Structures rotarylock | HCI NOI Selection Test 2015 | Batch | 180 |
| candies | N/A | ⓘTags: Data Structures candies | Dunjudge Archive | Batch | 182 |
| pushups | N/A | ⓘTags: Math pushups | Dunjudge Archive | Batch | 255 |
| sortedandsorted | N/A | ⓘTags: Data Structures, Dynamic Programming sortedandsorted | ARC 097 | Batch | 9 |
| shikandgame | N/A | ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window shikandgame | AGC 007 | Batch | 20 |
| car | N/A | ⓘTags: Graph Theory car | Dunjudge Archive | Batch | 348 |
| rabbittolls | N/A | ⓘTags: Graph Theory rabbittolls | Dunjudge Archive | Batch | 21 |
| cycling | N/A | ⓘTags: Graph Theory, Trees cycling | Dunjudge Archive | Batch | 22 |
| sealevel | N/A | ⓘTags: Graph Theory sealevel | Dunjudge Archive | Batch | 259 |
| penguinislands | N/A | ⓘTags: Dynamic Programming, Graph Theory penguinislands | Dunjudge Archive | Batch | 51 |
| transform | N/A | ⓘTags: Brute Force, Dynamic Programming, Graph Theory transform | Dunjudge Archive | Batch | 179 |
| rank | N/A | ⓘTags: Graph Theory rank | NOI 2008 | Batch | 134 |
| foreveralone | N/A | ⓘTags: Data Structures foreveralone | Dunjudge Archive | Batch | 509 |
| nemo | N/A | ⓘTags: Graph Theory nemo | Dunjudge Archive | Batch | 123 |
| catleap | N/A | ⓘTags: Graph Theory catleap | Dunjudge Archive | Batch | 42 |
| binaryroads | N/A | ⓘTags: Graph Theory binaryroads | Malaysian Computing Olympiad 2014 | Batch | 176 |
| pandacity | N/A | ⓘTags: Graph Theory, Greedy pandacity | Dunjudge Archive | Batch | 115 |
| goodmorning | N/A | ⓘTags: Graph Theory Good Morning | ISC 2020 practice (errorgorn) | Batch | 24 |
| nihonese | N/A | ⓘTags: Syntax nihonese | ISC 2020 practice (errorgorn) | Batch | 145 |
| simcity | N/A | ⓘTags: Graph Theory simcity | Dunjudge Archive | Batch | 116 |
| sightseeing | N/A | ⓘTags: Graph Theory, Trees sightseeing | NOI 2014 | Batch | 221 |
| minimax | N/A | ⓘTags: Graph Theory, Trees minimax | Hello 2020 (errorgorn) | Batch | 5 |
| buycomputer | N/A | ⓘTags: Greedy, Syntax buycomputer | Dec Trg 2019 (Elementary) (errorgorn) | Batch | 72 |
| surnames | N/A | ⓘTags: Dynamic Programming, Graph Theory, Square Root Decomposition, Trees Surnames | 2020 CNY (errorgorn) | Batch | 22 |
| unluckyfloors | N/A | ⓘTags: Dynamic Programming unluckyfloors | NOI 2016 | Batch | 70 |
| bestplace | N/A | ⓘTags: Greedy, Syntax bestplace | NOI 2017 | Batch | 546 |
| xmas | N/A | ⓘTags: Syntax xmas | NOI 2009 | Batch | 890 |
| rmaxq | N/A | ⓘTags: Data Structures Range Max Query | Dunjudge Archive | Batch | 245 |
| roadsideadverts | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees roadsideadverts | NOI 2017 | Batch | 128 |
| bananafarm | N/A | ⓘTags: Data Structures bananafarm | NOI 2015 | Batch | 148 |
| card | N/A | ⓘTags: Data Structures Card | NOI 2010 | Batch | 987 |
| gift | N/A | ⓘTags: Syntax gift | NOI 2007 | Batch | 609 |
| lunchbox | N/A | ⓘTags: Greedy Lunch Box | NOI 2016 | Batch | 1925 |
| paint | N/A | ⓘTags: Greedy paint | NOI 2011 | Batch | 945 |
| levenshtein | N/A | ⓘTags: Dynamic Programming levenshtein | Classic problem | Batch | 148 |
| helloworld | N/A | ⓘTags: Syntax Hello World | Classic problem | Batch | 3199 |
| chocolate | N/A | ⓘTags: Dynamic Programming chocolate | Dunjudge Archive | Batch | 32 |
| watching | N/A | ⓘTags: Binary Search, Dynamic Programming watching | JOI Open 2013 | Batch | 162 |
| bottle | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Bottle | Dunjudge Archive | Batch | 38 |
| goinghome_agc | N/A | ⓘTags: Data Structures, Greedy goinghome_agc | AGC 023 | Batch | 45 |
| ufo | N/A | ⓘTags: Dynamic Programming ufo | Dunjudge Archive | Batch | 12 |
| radioactive | N/A | ⓘTags: Divide and Conquer, Dynamic Programming radioactive | NOI 2015 | Batch | 36 |
| niangao | N/A | ⓘTags: Data Structures Nian Gao | 2020 CNY (errorgorn) | Batch | 11 |
| excombo | N/A | ⓘTags: Dynamic Programming, Greedy EX Combo | RSA Fun Contest (oolimry) | Batch | 17 |
| radiance | N/A | ⓘTags: Square Root Decomposition radiance | RSA Fun Contest (oolimry) | Batch | 17 |
| hole | N/A | ⓘTags: Binary Search, Dynamic Programming hole | Dunjudge Archive | Batch | 46 |
| collectmushrooms6 | N/A | ⓘTags: Dynamic Programming CollectMushrooms | NOI 2018 | Batch | 303 |
| special | N/A | ⓘTags: Dynamic Programming special | Dunjudge Archive | Batch | 45 |
| history | N/A | ⓘTags: Dynamic Programming history | Dunjudge Archive | Batch | 89 |
| commonsubstring | N/A | ⓘTags: Dynamic Programming commonsubstring | Dunjudge Archive | Batch | 108 |
| monopoly | N/A | ⓘTags: Dynamic Programming monopoly | Dunjudge Archive | Batch | 78 |
| buffet | N/A | ⓘTags: Dynamic Programming buffet | Dunjudge Archive | Batch | 304 |
| mate | N/A | ⓘTags: Graph Theory mate | RSA Fun Contest (errorgorn) | Batch | 40 |
| girlfriends | N/A | ⓘTags: Explicitly Excluded (from IOI), Math girlfriends (EE) | CP Singles Day Contest 2020 (errorgorn) | Batch | 5 |
| floors | N/A | ⓘTags: Data Structures floors | Dunjudge Archive | Batch | 218 |
| inequality | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming, Line Sweep/Sliding Window inequality | RI-HCI NOI Selection Test 2020 (0rang3) | Batch | 13 |
| catnames | N/A | ⓘTags: Math catnames | RI/RJC NOI Selection Test 2016 | Batch | 33 |
| pokeadd | N/A | ⓘTags: Math pokeadd | Dunjudge Archive | Batch | 45 |
| chessislands | N/A | ⓘTags: Graph Theory chessislands | NOI 2010 Selection Test | Batch | 169 |
| primefactorization | N/A | ⓘTags: Math primefactorization | Dunjudge Archive | Batch | 347 |
| papaya | N/A | ⓘTags: Graph Theory papaya | Dunjudge Archive | Batch | 138 |
| amicablecats | N/A | ⓘTags: Math, Syntax amicablecats | Dunjudge Archive | Batch | 179 |
| gcd | N/A | ⓘTags: Math, Syntax Greatest Common Divisor | Classic Problem | Batch | 1611 |
| pokenumbers | N/A | ⓘTags: Math pokenumbers | Dunjudge Archive | Batch | 49 |
| exponentiate | N/A | ⓘTags: Math Exponentiate | Classic Problem | Batch | 780 |
| nprime | N/A | ⓘTags: Brute Force, Math Prime | NOI 2008 | Batch | 642 |
| mrt | N/A | ⓘTags: Graph Theory MRT | Dunjudge Archive | Batch | 452 |
| dinowalk | N/A | ⓘTags: Graph Theory dinowalk | Classic Problem | Batch | 219 |
| prime | N/A | ⓘTags: Math Prime Numbers | Classic Problem | Batch | 1184 |
| housing | N/A | ⓘTags: Dynamic Programming housing | NOI 2008 | Batch | 170 |
| coincombinations | N/A | ⓘTags: Dynamic Programming coincombinations | Classic Problem | Batch | 331 |
| republiccity | N/A | ⓘTags: Graph Theory Republic City | RI Nov Sel 2020 (JustAWallaby) | Batch | 33 |
| stonk | N/A | ⓘTags: Greedy Stonks | Dec Trg 2019 (Elementary) (shenxy13) | Batch | 272 |
| firelord | N/A | ⓘTags: Dynamic Programming firelord | RI Nov Sel 2020 (jiahng) | Batch | 72 |
| coinbag | N/A | ⓘTags: Dynamic Programming coinbag | Dunjudge Archive | Batch | 346 |
| potatotree | N/A | ⓘTags: Data Structures potatotree | RI Nov Sel 2020 (syy) | Batch | 358 |
| dyingpolynomial | N/A | ⓘTags: Binary Search Dying Polynomial | RI Nov Sel 2020 (JustAWallaby) | Batch | 425 |
| exam | N/A | ⓘTags: Syntax Exam | RI Nov Sel 2020 (syy) | Batch | 2479 |
| gecko | N/A | ⓘTags: Dynamic Programming gecko | NOI 2008 | Batch | 631 |
| pascal | N/A | ⓘTags: Dynamic Programming, Math pascal | Dunjudge Archive | Batch | 449 |
| flybot | N/A | ⓘTags: Dynamic Programming flybot | Dunjudge Archive | Batch | 484 |
| strawberry | N/A | ⓘTags: Data Structures, Dynamic Programming Speedy Strawberries | 2020 CNY (shenxy13) | Batch | 24 |
| divisibility | N/A | ⓘTags: Dynamic Programming divisibility | Dunjudge Archive | Batch | 74 |
| lcs | N/A | ⓘTags: Dynamic Programming lcs | Classic problem | Batch | 465 |
| luckynumbers | N/A | ⓘTags: Adhoc, Dynamic Programming Lucky Numbers | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch | 8 |
| cardtrick | N/A | ⓘTags: Data Structures Card Trick | Classic Problem (oolimry) | Batch | 131 |
| addition | N/A | ⓘTags: Syntax Addition of 2 numbers | Classic problem | Batch | 2825 |
| general | N/A | ⓘTags: Graph Theory general | Classic Problem | Batch | 320 |
| lis | N/A | ⓘTags: Binary Search, Dynamic Programming Longest Increasing Subsequence | Classic problem | Batch | 506 |
| deathray | N/A | ⓘTags: Data Structures deathray | Dec Trg 2019 (Elementary) (shenxy13) | Batch | 159 |
| pigeonnests | N/A | ⓘTags: Data Structures, Graph Theory, Trees pigeonnests | RSA Fun Contest (shenxy13) | Batch | 61 |
| leftright | N/A | ⓘTags: Data Structures Left and Right | Dec Trg 2019 (Elementary) (oolimry) | Batch | 254 |
| greeting | N/A | ⓘTags: Syntax CNY Greetings | 2020 CNY (errorgorn) | Batch | 915 |
| doubletrouble | N/A | ⓘTags: Data Structures, Greedy Double Trouble | Dec Trg 2019 (Elementary) (oolimry) | Batch | 54 |
| frisbee | N/A | ⓘTags: Data Structures, Dynamic Programming, Slope Trick Frisbee Training | 2019 IOI Problem Setter Contest (0rang3) | Batch | 11 |
| mincross_usaco | N/A | ⓘTags: Data Structures mincross_usaco | USACO 2017 Feb, Platinum | Batch | 7 |