Select a set of tags to display all problems with at least 1 of those tags
|
Problem ID
|
Your Score
|
Title
|
Source
|
Problem Type
|
#ACs
|
|---|---|---|---|---|---|
| helloworld | N/A | ⓘTags: Syntax Hello World | Classic problem | Batch | 548 |
| addition | N/A | ⓘTags: Syntax Addition of 2 numbers | Classic problem | Batch | 471 |
| exam | N/A | ⓘTags: Syntax Exam | RI Nov Sel 2020 (syy) | Batch | 432 |
| sumint | N/A | ⓘTags: Syntax Sum of Integers | Dunjudge Archive | Batch | 403 |
| maximum | N/A | ⓘTags: Syntax Maximum | Dunjudge Archive | Batch | 379 |
| gcd | N/A | ⓘTags: Math, Syntax Greatest Common Divisor | Classic Problem | Batch | 335 |
| lunchbox | N/A | ⓘTags: Greedy Lunch Box | NOI 2016 | Batch | 319 |
| 3nplus1 | N/A | ⓘTags: Syntax 3nplus1 | Classic Problem | Batch | 306 |
| boxispull | N/A | ⓘTags: Adhoc, Syntax Box is Pull | Codeforces Raif Round 1 (bensonlzl) | Batch | 294 |
| psle | N/A | ⓘTags: Syntax Old PSLE Grading System | Classic Problem | Batch | 275 |
| evenorodd | N/A | ⓘTags: Syntax evenorodd | Classic Problem | Batch | 274 |
| fibo | N/A | ⓘTags: Dynamic Programming, Math Fibonacci | Classic Problem | Batch | 270 |
| flamethrower | N/A | ⓘTags: Brute Force Flame Thrower | Dunjudge Archive | Batch | 256 |
| fizzbuzz | N/A | ⓘTags: Math, Syntax FizzBuzz | Classic Problem | Batch | 245 |
| prime | N/A | ⓘTags: Math Prime Numbers | Classic Problem | Batch | 236 |
| adjmatrix | N/A | ⓘTags: Graph Theory Adjacency Matrix | Dunjudge Archive | Batch | 235 |
| rightangtri | N/A | ⓘTags: Syntax rightangtri | Classic Problem | Batch | 233 |
| brick | N/A | ⓘTags: Data Structures brick | Dunjudge Archive | Batch | 229 |
| smurf | N/A | ⓘTags: Brute Force, Syntax smurf | RI Deccourse 2018 Selection Test (tch1001) | Batch | 226 |
| card | N/A | ⓘTags: Data Structures Card | NOI 2010 | Batch | 222 |
| adjlist | N/A | ⓘTags: Graph Theory Adjacency List | Dunjudge Archive | Batch | 222 |
| xmas | N/A | ⓘTags: Syntax xmas | NOI 2009 | Batch | 206 |
| potatosalad | N/A | ⓘTags: Greedy potatosalad | Classic Problem | Batch | 206 |
| paint | N/A | ⓘTags: Greedy paint | NOI 2011 | Batch | 201 |
| simp | N/A | ⓘTags: Adhoc, Brute Force Simp | Codeforces 1033A | Batch | 200 |
| lis_easy | N/A | ⓘTags: Dynamic Programming lis_easy | Classic problem | Batch | 199 |
| contestcalc | N/A | ⓘTags: Math, Syntax contestcalc | Dunjudge Archive | Batch | 187 |
| exponentiate | N/A | ⓘTags: Math Exponentiate | Classic Problem | Batch | 183 |
| guanine | N/A | ⓘTags: Data Structures guanine | Dunjudge Archive | Batch | 181 |
| subgraphs | N/A | ⓘTags: Graph Theory Subgraphs | Dunjudge Archive | Batch | 181 |
| lengthsort | N/A | ⓘTags: Syntax lengthsort | Dunjudge Archive | Batch | 181 |
| minimum | N/A | ⓘTags: Syntax minimum | Classic Problem | Interactive | 180 |
| timeexam | N/A | ⓘTags: Math, Syntax What's the Time? | RI November Course Stage 2 Selection Test 2021 (ryangohca) | Batch | 171 |
| weddingcoins | N/A | ⓘTags: Greedy weddingcoins | Dunjudge Archive | Batch | 171 |
| arrayfind | N/A | ⓘTags: Binary Search arrayfind | Dunjudge Archive | Batch | 168 |
| bracketex | N/A | ⓘTags: Syntax bracketex | Dunjudge Archive | Batch | 163 |
| 3nplus1II | N/A | ⓘTags: Syntax 3nplus1II | Classic Problem | Batch | 162 |
| nprime | N/A | ⓘTags: Brute Force, Math Prime | NOI 2008 | Batch | 160 |
| pigeons | N/A | ⓘTags: Brute Force pigeons | Classic Problem | Batch | 160 |
| medianstring | N/A | ⓘTags: Syntax medianstring | Dunjudge Archive | Batch | 158 |
| segmenttree | N/A | ⓘTags: Data Structures Segment Tree | Classic problem | Batch | 155 |
| splithunny | N/A | ⓘTags: Graph Theory splithunny | Dunjudge Archive | Batch | 155 |
| binarycoins | N/A | ⓘTags: Bitmask, Greedy, Syntax binarycoins | Dunjudge Archive | Batch | 155 |
| gecko | N/A | ⓘTags: Dynamic Programming gecko | NOI 2008 | Batch | 152 |
| cuberoot | N/A | ⓘTags: Binary Search, Math, Syntax cuberoot | Classic Problem | Batch | 152 |
| diamond | N/A | ⓘTags: Syntax diamond | Classic Problem | Batch | 151 |
| descsort | N/A | ⓘTags: Syntax descsort | Dunjudge Archive | Batch | 144 |
| catlunch | N/A | ⓘTags: Data Structures, Greedy catlunch | RI/RJC NOI Selection Test 2016 | Batch | 144 |
| lvm | N/A | ⓘTags: Brute Force, Data Structures lvm | NOI 2008 | Batch | 143 |
| frogs | N/A | ⓘTags: Syntax Frogs | Winter Computer School 2010/11 Team Contest #1 | Batch | 138 |
| flybot | N/A | ⓘTags: Dynamic Programming flybot | Dunjudge Archive | Batch | 138 |
| mrt | N/A | ⓘTags: Graph Theory MRT | Dunjudge Archive | Batch | 135 |
| lis | N/A | ⓘTags: Binary Search, Dynamic Programming Longest Increasing Subsequence | Classic problem | Batch | 130 |
| prefixsums | N/A | ⓘTags: Dynamic Programming, Syntax prefixsums | Classic Problem (YeoBL20) | Batch | 128 |
| wabot | N/A | ⓘTags: Greedy wabot | December Course 2019 Advanced Final Contest (bensonlzl) | Batch | 126 |
| catfight | N/A | ⓘTags: Line Sweep/Sliding Window catfight | Dunjudge Archive | Batch | 126 |
| area | N/A | ⓘTags: Syntax area | Dunjudge Archive | Batch | 126 |
| GSS | N/A | ⓘTags: Greedy GSS | Dunjudge Archive | Batch | 125 |
| car | N/A | ⓘTags: Graph Theory car | Dunjudge Archive | Batch | 124 |
| beareatrabbit | N/A | ⓘTags: Dynamic Programming Bear Eat Rabbit | Classic Problem | Batch | 124 |
| lcs | N/A | ⓘTags: Dynamic Programming lcs | Classic problem | Batch | 120 |
| illuminate | N/A | ⓘTags: Math, Syntax Illuminate | RI-HCI NOI Selection Test 2020 (bensonlzl) | Batch | 117 |
| milkweed | N/A | ⓘTags: Graph Theory milkweed | Dunjudge Archive | Batch | 117 |
| ccs | N/A | ⓘTags: Data Structures ccs | Dunjudge Archive | Batch | 114 |
| uniquenumbers | N/A | ⓘTags: Data Structures uniquenumbers | Classic Problem | Batch | 112 |
| moneychanger | N/A | ⓘTags: Dynamic Programming moneychanger | Dunjudge Archive | Batch | 109 |
| typo | N/A | ⓘTags: Syntax Typo | ABC221 | Batch | 109 |
| addition2 | N/A | ⓘTags: Joke Addition? | Hello 2022 (oolimry) | Batch | 109 |
| fenwicktree | N/A | ⓘTags: Data Structures fenwicktree | Classic Problem | Batch | 108 |
| coinbag | N/A | ⓘTags: Dynamic Programming coinbag | Dunjudge Archive | Batch | 107 |
| candymountain_ex | N/A | ⓘTags: Data Structures, Dynamic Programming candymountain_ex | Dunjudge Archive | Batch | 107 |
| medianheap | N/A | ⓘTags: Data Structures medianheap | Dunjudge Archive | Batch | 104 |
| bestplace | N/A | ⓘTags: Greedy, Syntax bestplace | NOI 2017 | Batch | 104 |
| stepgame | N/A | ⓘTags: Dynamic Programming, Greedy stepgame | Classic Problem | Batch | 103 |
| pairsums | N/A | ⓘTags: Syntax Button Pairs | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 99 |
| primefactorization | N/A | ⓘTags: Math primefactorization | Dunjudge Archive | Batch | 99 |
| pandaeyes | N/A | ⓘTags: Greedy pandaeyes | Dunjudge Archive | Batch | 99 |
| foreveralone | N/A | ⓘTags: Data Structures foreveralone | Dunjudge Archive | Batch | 99 |
| competition | N/A | ⓘTags: Greedy competition | NOI 2021 Qualification | Batch | 98 |
| swapsort | N/A | ⓘTags: Adhoc Swap Sort | HCI December Course Selection 2021 (kai824, pavement) | Batch | 97 |
| dijkstra | N/A | ⓘTags: Graph Theory dijkstra | Dunjudge Archive | Batch | 96 |
| lineup | N/A | ⓘTags: Line Sweep/Sliding Window lineup | USACO Silver Nov 2011 | Batch | 96 |
| eeducation | N/A | ⓘTags: Syntax Elementary Education | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 96 |
| gotoschool | N/A | ⓘTags: Syntax Go To School | ABC142 | Batch | 95 |
| segmenttree2 | N/A | ⓘTags: Data Structures Segment Tree 2 | Classic Problem | Batch | 95 |
| general | N/A | ⓘTags: Graph Theory general | Classic Problem | Batch | 95 |
| greeting | N/A | ⓘTags: Syntax CNY Greetings | 2020 CNY (errorgorn) | Batch | 94 |
| clocktower | N/A | ⓘTags: Math, Syntax Clock Tower | RI December Course Selection Test 2021 (Deadeye) | Batch | 93 |
| buffet | N/A | ⓘTags: Dynamic Programming buffet | Dunjudge Archive | Batch | 91 |
| speakers | N/A | ⓘTags: Greedy speakers | Dunjudge Archive | Batch | 90 |
| hedgehogcrimes_easy | N/A | ⓘTags: Dynamic Programming Hedgehog Crimes (Easy Version) | Classic Problem | Batch | 90 |
| rmaxq | N/A | ⓘTags: Data Structures Range Max Query | Dunjudge Archive | Batch | 89 |
| 4sum | N/A | ⓘTags: Meet in the Middle 4sum | NOI 2008 | Batch | 89 |
| squidzofrenzic | N/A | ⓘTags: Binary Search squidzofrenzic | Dunjudge Archive | Batch | 88 |
| stonk | N/A | ⓘTags: Greedy Stonks | Dec Trg 2019 (Elementary) (shenxy13) | Batch | 88 |
| fuel | N/A | ⓘTags: Greedy fuel | Dunjudge Archive | Batch | 86 |
| reciprocals | N/A | ⓘTags: Constructive Algorithms, Syntax Reciprocals | HCI December Course Selection 2021 (huangqr, pavement) | Batch | 85 |
| omnomnom | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees omnomnom | Classic Problem | Batch | 85 |
| carpark | N/A | ⓘTags: Greedy carpark | Dunjudge Archive | Batch | 83 |
| summit | N/A | ⓘTags: Binary Search summit | Dunjudge Archive | Batch | 83 |
| trains | N/A | ⓘTags: Dynamic Programming trains | Dunjudge Archive | Batch | 83 |
| ljubomora | N/A | ⓘTags: Binary Search ljubomora | COCI 2012/2013 | Batch | 82 |
| countalp | N/A | ⓘTags: Syntax countalp | Classic Problem | Batch | 81 |
| management | N/A | ⓘTags: Syntax Management | ABC163C | Batch | 81 |
| snack | N/A | ⓘTags: Dynamic Programming, Greedy snack | Dunjudge Archive | Batch | 81 |
| floors | N/A | ⓘTags: Data Structures floors | Dunjudge Archive | Batch | 80 |
| fractions | N/A | ⓘTags: Syntax fractions | Classic Problem (YeoBL20) | Batch | 80 |
| mountains | N/A | ⓘTags: Data Structures Mountains | NOI 2020 Prelims | Batch | 79 |
| coincombinations | N/A | ⓘTags: Dynamic Programming coincombinations | Classic Problem | Batch | 77 |
| scalars | N/A | ⓘTags: Greedy scalars | Dunjudge Archive | Batch | 77 |
| oranges2 | N/A | ⓘTags: Graph Theory, Trees oranges2 | RI Deccourse 2018 Selection Test (0rang3) | Batch | 77 |
| ancestor | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees ancestor | Classic problem | Batch | 77 |
| sealevel | N/A | ⓘTags: Graph Theory sealevel | Dunjudge Archive | Batch | 77 |
| poi | N/A | ⓘTags: Syntax poi | IOI 2009 | Batch | 76 |
| pascal | N/A | ⓘTags: Dynamic Programming, Math pascal | Dunjudge Archive | Batch | 76 |
| collectmushrooms | N/A | ⓘTags: Syntax collectmushrooms | Dunjudge Archive | Batch | 75 |
| 1609 | N/A | ⓘTags: Joke 1609 | April Fools' 2021 (0rang3) | Batch | 75 |
| globalwarming | N/A | ⓘTags: Line Sweep/Sliding Window Global Warming | NOI 2013 | Batch | 75 |
| arrayproblem | N/A | ⓘTags: Greedy arrayproblem | Codeforces | Batch | 74 |
| lightningrod | N/A | ⓘTags: Adhoc, Data Structures LightningRod | NOI 2018 | Batch | 74 |
| collectmushrooms6 | N/A | ⓘTags: Dynamic Programming CollectMushrooms | NOI 2018 | Batch | 73 |
| payraise | N/A | ⓘTags: Graph Theory payraise | Dunjudge Archive | Batch | 73 |
| universe | N/A | ⓘTags: Graph Theory, Trees universe | Dunjudge Archive | Batch | 72 |
| amicablecats | N/A | ⓘTags: Math, Syntax amicablecats | Dunjudge Archive | Batch | 72 |
| twomeals | N/A | ⓘTags: Brute Force, Dynamic Programming, Greedy twomeals | Dunjudge Archive | Batch | 72 |
| neckties | N/A | ⓘTags: Data Structures, Greedy Just Long Neckties | JOI 2020 Final Round | Batch | 72 |
| sightseeing | N/A | ⓘTags: Graph Theory, Trees sightseeing | NOI 2014 | Batch | 71 |
| boundlessboxes | N/A | ⓘTags: Graph Theory boundlessboxes | Dunjudge Archive | Batch | 70 |
| bananasmoothie | N/A | ⓘTags: Greedy Banana Smoothie | Dunjudge Archive (shenxy13) | Batch | 69 |
| rotarylock | N/A | ⓘTags: Data Structures rotarylock | HCI NOI Selection Test 2015 | Batch | 68 |
| helloworld2 | N/A | ⓘTags: Joke Hello World? | Hello 2022 (jamessng) | Batch | 68 |
| potatotree | N/A | ⓘTags: Data Structures potatotree | RI Nov Sel 2020 (syy) | Batch | 66 |
| cups | N/A | ⓘTags: Data Structures cups | Deccourse 2021 DS II Contest (errorgorn) | Batch | 66 |
| conversations | N/A | ⓘTags: Data Structures Zookeeper's Conversations | Singapore Zoo (shenxy13) | Batch | 66 |
| dinowalk | N/A | ⓘTags: Graph Theory dinowalk | Classic Problem | Batch | 64 |
| eescapism | N/A | ⓘTags: Adhoc, Math Elementary Escapism | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 64 |
| entropy | N/A | ⓘTags: Greedy, Syntax entropy | RI-HCI December Course Selection 2020 (0rang3) | Batch | 64 |
| omnomnom2 | N/A | ⓘTags: Graph Theory, Trees omnomnom2 | Classic Problem | Batch | 63 |
| typicalstairs | N/A | ⓘTags: Dynamic Programming Typical Stairs | ABC 129 | Batch | 63 |
| subtaskstitching | N/A | ⓘTags: Joke subtaskstitching | Codebreaker Development | Batch | 63 |
| transform | N/A | ⓘTags: Brute Force, Dynamic Programming, Graph Theory transform | Dunjudge Archive | Batch | 62 |
| zooqueue | N/A | ⓘTags: Data Structures Zoo Queue | NUS December Training 2021 Diagnostic Test (shenxy13) | Batch | 61 |
| smallprimes | N/A | ⓘTags: Brute Force, Math Small Primes | Classic Problem | Batch | 61 |
| eelimination | N/A | ⓘTags: Data Structures Elementary Elimination | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 61 |
| magicwand | N/A | ⓘTags: Graph Theory magicwand | Dunjudge Archive | Batch | 61 |
| chessislands | N/A | ⓘTags: Graph Theory chessislands | NOI 2010 Selection Test | Batch | 61 |
| f7 | N/A | ⓘTags: Greedy F7 | COCI 2012/2013 | Batch | 60 |
| candies | N/A | ⓘTags: Data Structures candies | Dunjudge Archive | Batch | 59 |
| grid | N/A | ⓘTags: Dynamic Programming Grid | Atcoder Educational DP Contest | Batch | 59 |
| leftright | N/A | ⓘTags: Data Structures Left and Right | Dec Trg 2019 (Elementary) (oolimry) | Batch | 59 |
| pushups | N/A | ⓘTags: Math pushups | Dunjudge Archive | Batch | 59 |
| solonim | N/A | ⓘTags: Math, Syntax Solo Nim | Dunjudge Archive | Batch | 58 |
| sandd | N/A | ⓘTags: Binary Search sandd | Classic Problem | Interactive | 58 |
| hashcollision | N/A | ⓘTags: Joke Hash Collision | Hello 2021 (shenxy13) | Interactive | 58 |
| conversations_easy | N/A | ⓘTags: Data Structures Zookeeper's Conversations (Easy Version) | RI-HCI December Course Selection 2020 (shenxy13) | Batch | 57 |
| watching | N/A | ⓘTags: Binary Search, Dynamic Programming watching | JOI Open 2013 | Batch | 57 |
| pigeonhole | N/A | ⓘTags: Data Structures pigeonhole | Dunjudge Archive | Batch | 57 |
| inversions | N/A | ⓘTags: Data Structures, Divide and Conquer inversions | Dunjudge Archive | Batch | 57 |
| workload | N/A | ⓘTags: Dynamic Programming December Training Workload | Classic Problem | Batch | 57 |
| party | N/A | ⓘTags: Data Structures, Graph Theory party | Dunjudge Archive | Batch | 56 |
| rabbiteatrabbit | N/A | ⓘTags: Dynamic Programming rabbiteatrabbit | Dec Trg 2019 (Elementary) (jamielim) | Batch | 56 |
| 1821 | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Joke, Trees 1821 | April Fools' 2021 (zaneyu) | Batch | 55 |
| housing | N/A | ⓘTags: Dynamic Programming housing | NOI 2008 | Batch | 55 |
| badpotato | N/A | ⓘTags: Dynamic Programming badpotato | Dunjudge Archive | Batch | 55 |
| taxcollection | N/A | ⓘTags: Greedy, Syntax taxcollection | RI-HCI December Course Selection 2020 (JustAWallaby) | Batch | 55 |
| pilot | N/A | ⓘTags: Adhoc, Data Structures pilot | NOI 2019 | Batch | 54 |
| gift | N/A | ⓘTags: Syntax gift | NOI 2007 | Batch | 54 |
| nihonese | N/A | ⓘTags: Syntax nihonese | ISC 2020 practice (errorgorn) | Batch | 53 |
| collectmushrooms2 | N/A | ⓘTags: Data Structures collectmushrooms2 | Dunjudge Archive | Batch | 53 |
| nemo | N/A | ⓘTags: Graph Theory nemo | Dunjudge Archive | Batch | 53 |
| routers | N/A | ⓘTags: Greedy routers | Dunjudge Archive | Batch | 52 |
| roadsideadverts | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees roadsideadverts | NOI 2017 | Batch | 52 |
| inheritance | N/A | ⓘTags: Graph Theory inheritance | JOI 2014/2015 | Batch | 52 |
| bananafarm | N/A | ⓘTags: Data Structures bananafarm | NOI 2015 | Batch | 52 |
| optmilk | N/A | ⓘTags: Data Structures, Dynamic Programming Optimal Milking | Dunjudge Archive | Batch | 51 |
| problematicjourney | N/A | ⓘTags: Binary Search, Graph Theory Problematic Journey | Classic Problem | Batch | 51 |
| singlefile | N/A | ⓘTags: Data Structures singlefile | Dunjudge Archive | Batch | 50 |
| razlika | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window razlika | Dunjudge Archive | Batch | 50 |
| 4russians | N/A | ⓘTags: Dynamic Programming 4russians | RI-HCI NOI Selection Test 2020 (jamielim) | Batch | 50 |
| knightmoves | N/A | ⓘTags: Graph Theory knightmoves | Dunjudge Archive | Batch | 49 |
| rank | N/A | ⓘTags: Graph Theory rank | NOI 2008 | Batch | 49 |
| assembly | N/A | ⓘTags: Dynamic Programming assembly | Dunjudge Archive | Batch | 49 |
| snakenladder | N/A | ⓘTags: Dynamic Programming snakenladder | Dunjudge Archive | Batch | 48 |
| coke | N/A | ⓘTags: Dynamic Programming, Greedy Coke | NUSH ISC 2020 (errorgorn) | Batch | 48 |
| eevacuation | N/A | ⓘTags: Dynamic Programming, Graph Theory Elementary Evacuation | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 48 |
| deque | N/A | ⓘTags: Dynamic Programming Deque | AtCoder Educational DP Contest | Batch | 48 |
| 7up | N/A | ⓘTags: Syntax 7up | RI November Course Stage 2 Selection Test 2019 | Batch | 47 |
| heatwv | N/A | ⓘTags: Graph Theory Heat Wave | Dunjudge Archive | Batch | 47 |
| bobek | N/A | ⓘTags: Bitmask, Meet in the Middle bobek | CEOI 2015 | Batch | 47 |
| unmerge | N/A | ⓘTags: Dynamic Programming Unmerge | Codeforces 1381B | Batch | 47 |
| lcm | N/A | ⓘTags: Math lcm | Classic Problem | Batch | 47 |
| padoru | N/A | ⓘTags: Graph Theory Hashire Sori Yo! | Dec Course 2020 BAPS (peaceknight05) | Batch | 47 |
| sort | N/A | ⓘTags: Adhoc sort | Classic Problem? | Batch | 47 |
| flights | N/A | ⓘTags: Graph Theory flights | Dunjudge Archive | Batch | 47 |
| minstack | N/A | ⓘTags: Data Structures minstack | Dunjudge Archive | Interactive | 47 |
| localexpress | N/A | ⓘTags: Dynamic Programming localexpress | AtCoder Typical DP Contest | Batch | 46 |
| dyingpolynomial | N/A | ⓘTags: Binary Search Dying Polynomial | RI Nov Sel 2020 (JustAWallaby) | Batch | 46 |
| towerdefense | N/A | ⓘTags: Graph Theory towerdefense | Dunjudge Archive | Batch | 46 |
| cookieclickeralpha | N/A | ⓘTags: Math, Syntax cookieclickeralpha | Google Code Jam 2014 | Batch | 45 |
| 727 | N/A | ⓘTags: Greedy, Math 727 | HCI-NUSH NOI Selection 2022 (errorgorn) | Batch | 45 |
| ballot | N/A | ⓘTags: Data Structures ballot | Dunjudge Archive | Batch | 45 |
| wabbit | N/A | ⓘTags: Greedy wabbit | RI-HCI-NUSH NOI Selection Test 2021 (oolimry) | Batch | 45 |
| entropy2 | N/A | ⓘTags: Adhoc, Brute Force entropy2 | RI December Course Selection Test 2021 (kym) | Batch | 44 |
| carrots | N/A | ⓘTags: Greedy carrots | Codeforces Raif Round 1 (errorgorn) | Batch | 44 |
| chinese | N/A | ⓘTags: Syntax chinese | Dunjudge Archive | Batch | 44 |
| palindromicfizzbuzz | N/A | ⓘTags: Syntax Palindromic FizzBuzz | NOI 2019 Prelims | Batch | 43 |
| pandacity | N/A | ⓘTags: Graph Theory pandacity | Dunjudge Archive | Batch | 43 |
| rblock | N/A | ⓘTags: Graph Theory rblock | USACO 2011 December Contest, Silver Division | Batch | 43 |
| commando | N/A | ⓘTags: Dynamic Programming commando | APIO 2010 | Batch | 43 |
| graphcraft | N/A | ⓘTags: Graph Theory graphcraft | Dunjudge Archive | Interactive | 43 |
| becomingred | N/A | ⓘTags: Joke Becoming Red ඞ ඞ ඞ | Hello 2022 (oolimry) | Batch | 42 |
| fruitsequences | N/A | ⓘTags: Adhoc, Data Structures Fruit Sequences | Codeforces Raif Round 1 (bensonlzl) | Batch | 42 |
| abbb | N/A | ⓘTags: Greedy abbb | Codeforces Raif Round 1 (errorgorn) | Batch | 42 |
| nis | N/A | ⓘTags: Data Structures, Dynamic Programming nis | Dunjudge Archive | Batch | 42 |
| picnic | N/A | ⓘTags: Binary Search, Greedy Picnic | Codeforces Global Round 17 | Batch | 42 |
| stickytape | N/A | ⓘTags: Greedy Sticky Tape | Classic Problem | Batch | 41 |
| harddisk | N/A | ⓘTags: Bitmask, Brute Force, Meet in the Middle harddisk | 2015 NOI Training Problem-Setter Contest | Batch | 41 |
| supplies | N/A | ⓘTags: Graph Theory supplies | Dunjudge Archive | Batch | 41 |
| sightseeing2 | N/A | ⓘTags: Graph Theory, Trees sightseeing2 | RI NOI Selection Test 2015 | Batch | 41 |
| railway | N/A | ⓘTags: Graph Theory, Trees railway | CPSPC 2004 | Batch | 41 |
| spellofweakness | N/A | ⓘTags: Binary Search, Greedy, Line Sweep/Sliding Window Spell Of Weakness | Dunjudge Archive (dantoh) | Batch | 41 |
| digits | N/A | ⓘTags: Data Structures digits | Deccourse 2021 DS II Contest (errorgorn) | Batch | 41 |
| labels | N/A | ⓘTags: Adhoc labels | NOI 2020 Finals | Batch | 41 |
| christmasfeast | N/A | ⓘTags: Adhoc Christmas Feast | Educational Round 2 (errorgorn) | Batch | 41 |
| employee | N/A | ⓘTags: Graph Theory, Trees employee | Dunjudge Archive | Batch | 41 |
| levelingup | N/A | ⓘTags: Dynamic Programming Leveling Up | RI November Course Stage 2 Selection Test 2021 (ryangohca) | Batch | 41 |
| hacking | N/A | ⓘTags: Graph Theory Hacking | Classic problem (fyss006) | Batch | 40 |
| coinjourney | N/A | ⓘTags: Binary Search Coin Journey | RI November Course Stage 2 Selection Test 2021 (kym) | Batch | 40 |
| 01knapsack | N/A | ⓘTags: Dynamic Programming 0-1 Knapsack | Classic problem (Atcoder Educational DP Contest) | Batch | 40 |
| replacedigits | N/A | ⓘTags: Data Structures Replace Digits | ACL Beginner Contest | Batch | 40 |
| towers | N/A | ⓘTags: Data Structures, Dynamic Programming towers | Codeforces 474E | Batch | 40 |
| penguinfood | N/A | ⓘTags: Data Structures penguinfood | Dunjudge Archive | Batch | 40 |
| boundedpermutation | N/A | ⓘTags: Adhoc, Dynamic Programming, Math Bounded Permutation | HCI-NUSH NOI Selection 2022 (maomao90) | Batch | 39 |
| workoutplan | N/A | ⓘTags: Greedy Workout plan | Bubble Cup 12 Div 1 | Batch | 39 |
| walking | N/A | ⓘTags: Dynamic Programming walking | NOI 2012 | Batch | 39 |
| flappyrabbit | N/A | ⓘTags: Greedy Flappy Rabbit | HCI-NUSH NOI Selection 2022 (pavement) | Interactive | 39 |
| lunchcombo | N/A | ⓘTags: Binary Search, Greedy lunchcombo | RI November Course Stage 2 Selection Test 2019 | Batch | 39 |
| catchingcheaters | N/A | ⓘTags: Dynamic Programming Catching Cheaters | Codeforces Round 683 (Div 1) | Batch | 38 |
| lol | N/A | ⓘTags: Dynamic Programming lol | Dunjudge Archive | Batch | 38 |
| lboard | N/A | ⓘTags: Brute Force L-Board | NOI 2022 Qualification | Batch | 38 |
| generosity | N/A | ⓘTags: Joke Generosity | April Fools' 2022 (oolimry) | Batch | 38 |
| dotjoin | N/A | ⓘTags: Graph Theory, Trees dotjoin | Dunjudge Archive | Batch | 38 |
| train | N/A | ⓘTags: Dynamic Programming train | Dunjudge archive | Batch | 38 |
| variety | N/A | ⓘTags: Dynamic Programming variety | RI November Course Stage 2 Selection Test 2019 | Batch | 38 |
| sherlockinversions | N/A | ⓘTags: Data Structures, Square Root Decomposition sherlockinversions | Dunjudge Archive | Batch | 37 |
| papaya | N/A | ⓘTags: Graph Theory papaya | Dunjudge Archive | Batch | 37 |
| travel | N/A | ⓘTags: Greedy Travel | CCO 2015 | Batch | 37 |
| snapknack | N/A | ⓘTags: Dynamic Programming snapknack | Dunjudge Archive | Batch | 37 |
| quillvsowl | N/A | ⓘTags: Adhoc, Line Sweep/Sliding Window Quill Vs Owl | Dec Course 2020 BAPS (jamielim) | Batch | 37 |
| runway | N/A | ⓘTags: Binary Search, Graph Theory Jianzhi’s Runway Show | RI NOI Selection Test 2017 | Batch | 37 |
| construct | N/A | ⓘTags: Dynamic Programming, Graph Theory Constructing Birthday Presents | RI-HCI-NUSH NOI Selection Test 2021 (0rang3) | Batch | 37 |
| smurfpaths | N/A | ⓘTags: Data Structures, Graph Theory, Trees smurfpaths | RI-HCI NOI Selection Test 2020 (rs) | Batch | 36 |
| supermarket | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window supermarket | RI Dec Course Sel 2017 | Batch | 36 |
| collectmushrooms3 | N/A | ⓘTags: Data Structures collectmushrooms3 | Dunjudge Archive | Batch | 36 |
| stamps | N/A | ⓘTags: Dynamic Programming stamps | Dunjudge Archive | Batch | 36 |
| drones | N/A | ⓘTags: Graph Theory Drones | HCI December Course Selection 2021 (cstuart) | Batch | 36 |
| optimalsubseq | N/A | ⓘTags: Binary Search, Data Structures optimalsubseq | Codeforces 1227D2 | Batch | 36 |
| leave | N/A | ⓘTags: Data Structures leave | Dunjudge Archive | Batch | 35 |
| greenbeans | N/A | ⓘTags: Adhoc, Math, Syntax Green Beans Mayhem | RI November Course Stage 2 Selection Test 2021 (ryangohca, kym) | Batch | 35 |
| bosses | N/A | ⓘTags: Brute Force, Graph Theory, Greedy, Trees bosses | BOI 2016 | Batch | 35 |
| clique | N/A | ⓘTags: Data Structures clique | Algorithm Class Mini-Contest 8 | Batch | 35 |
| ljll | N/A | ⓘTags: Math LJLL | NUSH ISC 2020 (errorgorn) | Batch | 35 |
| letters | N/A | ⓘTags: Dynamic Programming letters | Dunjudge Archive | Batch | 35 |
| peddler | N/A | ⓘTags: Dynamic Programming, Graph Theory Peddler | ABC 188 | Batch | 35 |
| eatcake | N/A | ⓘTags: Divide and Conquer Eating Cake | Educational Codeforces Round 94 | Batch | 35 |
| ballgame | N/A | ⓘTags: Data Structures, Dynamic Programming ballgame | Dunjudge Archive | Interactive | 34 |
| poklon | N/A | ⓘTags: Data Structures, Square Root Decomposition poklon | COCI 2016/2017 | Batch | 34 |
| hamster1 | N/A | ⓘTags: Dynamic Programming Hamster's Journey | Atcoder Educational DP Contest | Batch | 34 |
| summarising2020 | N/A | ⓘTags: Information Theory, Joke Summarising 2020 | Hello 2021 (shenxy13) | Interactive | 34 |
| telepathy | N/A | ⓘTags: Joke Friendly Telepathy | April Fools' 2022 (0rang3) | Batch | 34 |
| penguinislands | N/A | ⓘTags: Dynamic Programming, Graph Theory penguinislands | Dunjudge Archive | Batch | 33 |
| peakfinding | N/A | ⓘTags: Syntax Peak Finding | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 33 |
| goinghome_agc | N/A | ⓘTags: Data Structures, Greedy goinghome_agc | AGC 023 | Batch | 33 |
| rectangleoutline | N/A | ⓘTags: Dynamic Programming, Line Sweep/Sliding Window Rectangle Outline | USACO 2016 January Contest, Platinum | Batch | 33 |
| manycolours | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees manycolours | ABC 133 | Batch | 33 |
| sterilizing | N/A | ⓘTags: Data Structures sterilizing | JOI 2014/15 | Batch | 32 |
| wormholes | N/A | ⓘTags: Dynamic Programming wormholes | Dunjudge Archive | Batch | 32 |
| binaryroads | N/A | ⓘTags: Graph Theory binaryroads | Dunjudge Archive | Batch | 32 |
| 0405 | N/A | ⓘTags: Joke, Math 0405 | April Fools' 2021 (zaneyu) | Batch | 31 |
| crypto | N/A | ⓘTags: Data Structures crypto | NOI 2020 Qualification | Batch | 31 |
| cheerleaders | N/A | ⓘTags: Dynamic Programming cheerleaders | Atcoder Educational DP Contest | Batch | 31 |
| spaceinvaders | N/A | ⓘTags: Brute Force, Data Structures, Dynamic Programming, Line Sweep/Sliding Window spaceinvaders | Educational Round 1 (bensonlzl) | Batch | 31 |
| justright | N/A | ⓘTags: Binary Search justright | Dunjudge Archive | Batch | 31 |
| vainish | N/A | ⓘTags: Dynamic Programming Vanish | 2015-2016 NOI Training Diagnostic Test | Batch | 31 |
| guards | N/A | ⓘTags: Dynamic Programming Guards | Dunjudge archive | Batch | 30 |
| exponentiate_ex | N/A | ⓘTags: Math exponentiate_ex | Classic Problem | Batch | 30 |
| fraud | N/A | ⓘTags: Adhoc, Math fraud | NOI 2021 Finals | Batch | 30 |
| growingtrees | N/A | ⓘTags: Binary Search, Data Structures growingtrees | BOI 2011 | Batch | 30 |
| orchard | N/A | ⓘTags: Dynamic Programming, Line Sweep/Sliding Window orchard | NOI 2014 | Batch | 30 |
| dna_ioi | N/A | ⓘTags: Adhoc Mutating DNA | IOI 2021 | Interactive | 30 |
| divisibility | N/A | ⓘTags: Dynamic Programming divisibility | Dunjudge Archive | Batch | 29 |
| oridance | N/A | ⓘTags: Dynamic Programming Orientation Dance | Codeforces 1509C | Batch | 29 |
| pairs | N/A | ⓘTags: Binary Search pairs | AtCoder Beginner Contest 155 | Batch | 29 |
| brackets | N/A | ⓘTags: Greedy Bracket Subsequence | Classic Problem (zengminghao) | Batch | 29 |
| guessqueue | N/A | ⓘTags: Brute Force, Data Structures Guess the Queue | Kattis (modified) (ryangohca) | Batch | 29 |
| commonsubstring | N/A | ⓘTags: Dynamic Programming commonsubstring | Dunjudge Archive | Batch | 29 |
| swimming | N/A | ⓘTags: Graph Theory Constructing a Swimming Pool | RI-HCI-NUSH NOI Selection Test 2021 (0rang3) | Batch | 29 |
| aircon | N/A | ⓘTags: Data Structures aircon | Codeforces Round #757 (Div. 2) | Batch | 28 |
| monopoly | N/A | ⓘTags: Dynamic Programming monopoly | Dunjudge Archive | Batch | 28 |
| applefarm | N/A | ⓘTags: Graph Theory applefarm | NUSH ISC 2020 (oolimry) | Batch | 28 |
| nonboringsequences | N/A | ⓘTags: Divide and Conquer nonboringsequences | Dunjudge Archive | Batch | 28 |
| 1503 | N/A | ⓘTags: Adhoc, Joke 1503 | April Fools' 2021 (jamielim) | Batch | 28 |
| lostarray | N/A | ⓘTags: Adhoc, Constructive Algorithms Lost Array | NOI 2019 Prelims | Batch | 28 |
| erp | N/A | ⓘTags: Graph Theory erp | Dunjudge Archive | Batch | 28 |
| subknapsack | N/A | ⓘTags: Dynamic Programming Knapsack for All Subsets | Atcoder Beginner Contest 169 | Batch | 28 |
| frog3 | N/A | ⓘTags: Dynamic Programming Frog 3 | Atcoder Educational DP Contest | Batch | 27 |
| performance | N/A | ⓘTags: Math Performance | NUSH ISC 2020 (oolimry) | Batch | 27 |
| numbers | N/A | ⓘTags: Dynamic Programming Palindrome-Free Numbers | BOI 2013 | Batch | 27 |
| mandarins | N/A | ⓘTags: Math Mandarins | 2020 CNY | Batch | 27 |
| hoofpaperscissor | N/A | ⓘTags: Dynamic Programming Hoof, Paper, Scissors | USACO 2017 January Contest, Gold | Batch | 27 |
| fractionalmultiset | N/A | ⓘTags: Dynamic Programming Fractional Multiset | ARC 107 | Batch | 27 |
| dice | N/A | ⓘTags: Math Dice | Dec Course 2021 BAPS (origami100, dillion) | Batch | 27 |
| feedthewallabies | N/A | ⓘTags: Graph Theory Feed the Wallabies | RI December Course Selection Test 2021 (syy) | Batch | 27 |
| examinations | N/A | ⓘTags: Data Structures examinations | JOI | Batch | 27 |
| lemmas | N/A | ⓘTags: Graph Theory lemmas | Educational Round 1 (errorgorn) | Batch | 26 |
| mathtree | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Implementation Cancer, Trees Math Tree | SGP Sparring 2021 (lovemathboy) | Batch | 26 |
| armpit | N/A | ⓘTags: Adhoc armpit | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch | 26 |
| ladybugs | N/A | ⓘTags: Dynamic Programming ladybugs | Dunjudge Archive | Batch | 26 |
| ferries | N/A | ⓘTags: Graph Theory ferries | NOI 2013 | Batch | 26 |
| election | N/A | ⓘTags: Data Structures, Dynamic Programming election | Dunjudge Archive | Batch | 26 |
| explosion | N/A | ⓘTags: Math explosion | Classic Problem | Batch | 25 |
| logs | N/A | ⓘTags: Binary Search logs | AtCoder | Batch | 25 |
| beautifulbrackets | N/A | ⓘTags: Dynamic Programming Beautiful Bracket Sequence | Codeforces 1264D1 | Batch | 25 |
| lasers | N/A | ⓘTags: Adhoc, Data Structures lasers | NOI 2019 | Batch | 25 |
| bacteria | N/A | ⓘTags: Data Structures bacteria | Dunjudge Archive | Batch | 25 |
| bridge_apio15 | N/A | ⓘTags: Data Structures Palembang Bridges | APIO 2015 | Batch | 25 |
| iqtest | N/A | ⓘTags: Math iqtest | Valentine's Day Contest 2022 (errorgorn) | Batch | 25 |
| stackweights | N/A | ⓘTags: Data Structures stackweights | CSES Problem Set | Batch | 25 |
| basketball | N/A | ⓘTags: Binary Search, Greedy basketball | NUSH ISC 2020 (dantoh) | Batch | 25 |
| charges | N/A | ⓘTags: Graph Theory Experimental Charges | NOI 2019 Prelims | Batch | 25 |
| bunnyscore | N/A | ⓘTags: Adhoc, Data Structures bunnyscore | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Interactive | 25 |
| fireandbeary | N/A | ⓘTags: Graph Theory fireandbeary | Dunjudge Archive (jamielim) | Batch | 25 |
| stones | N/A | ⓘTags: Graph Theory, Trees stones | Dunjudge Archive | Batch | 24 |
| deathray | N/A | ⓘTags: Data Structures deathray | Dec Trg 2019 (Elementary) (shenxy13) | Batch | 24 |
| wallabyhop | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window Wallaby Hop | RI December Course Selection Test 2021 (jiahng) | Batch | 24 |
| smallprimes_ex | N/A | ⓘTags: Meet in the Middle Small Primes? | Classic Problem? | Batch | 24 |
| simcity | N/A | ⓘTags: Graph Theory simcity | Dunjudge Archive | Batch | 24 |
| levenshtein | N/A | ⓘTags: Dynamic Programming levenshtein | Classic problem | Batch | 24 |
| square_ioi | N/A | ⓘTags: Dynamic Programming square_ioi | IOI 2014 Practice | Interactive | 24 |
| lazycat | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory lazycat | Dunjudge Archive | Batch | 24 |
| knapsack | N/A | ⓘTags: Dynamic Programming Knapsack | NOI 2018 Prelims | Batch | 24 |
| pigeonnests | N/A | ⓘTags: Data Structures, Graph Theory, Trees pigeonnests | RSA Fun Contest (shenxy13) | Batch | 24 |
| skillmoves | N/A | ⓘTags: Data Structures, Greedy skillmoves | RI November Course Stage 2 Selection Test 2019 | Batch | 24 |
| bottle | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Bottle | Dunjudge Archive | Batch | 23 |
| bracketsuperseq | N/A | ⓘTags: Dynamic Programming Shortest Bracket Supersequence | Codeforces 1272F | Batch | 23 |
| bank | N/A | ⓘTags: Bitmask, Dynamic Programming Bank | IZhO 2014 Day 1 | Batch | 23 |
| lps | N/A | ⓘTags: Dynamic Programming lps | Dunjudge Archive | Batch | 23 |
| modules | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming, Line Sweep/Sliding Window modules | NUSH NOI Selection Test 2018 | Batch | 23 |
| fortunetelling | N/A | ⓘTags: Data Structures Fortune Telling 2 | JOI 2014 | Batch | 23 |
| pavement | N/A | ⓘTags: Constructive Algorithms, Greedy Painting Pavements | HCI December Course Selection 2021 (pavement) | Batch | 23 |
| smurfberries | N/A | ⓘTags: Binary Search smurfberries | All-Ukrainian School Olympiad in Informatics 2011 | Batch | 23 |
| guessarray | N/A | ⓘTags: Adhoc 4sadfaces Guessing an Array | Dec Course 2020 BAPS (zaneyu) | Interactive | 23 |
| rainbowrabbit | N/A | ⓘTags: Adhoc, Greedy rainbowrabbit | RI-HCI December Course Selection 2019 (bensonlzl) | Batch | 23 |
| scanner | N/A | ⓘTags: Dynamic Programming scanner | Dunjudge Archive | Batch | 23 |
| bracketsyndrome | N/A | ⓘTags: Adhoc, Data Structures Bracket Syndrome | RI-HCI NOI Selection Test 2019 | Batch | 23 |
| removeelements | N/A | ⓘTags: Binary Search, Data Structures removeelements | Codeforces Round #668 | Batch | 23 |
| restaurant | N/A | ⓘTags: Greedy restaurant | Dunjudge Archive | Batch | 23 |
| unluckyfloors | N/A | ⓘTags: Dynamic Programming unluckyfloors | NOI 2016 | Batch | 23 |
| llis | N/A | ⓘTags: Dynamic Programming Longest LIS | NUSH NOI Selection Test 2018 | Batch | 23 |
| girlfriend | N/A | ⓘTags: Dynamic Programming, Graph Theory girlfriend | Dunjudge Archive | Batch | 22 |
| christmaxtrees | N/A | ⓘTags: Graph Theory, Greedy christmaxtrees | Codeforces 1283D | Batch | 22 |
| naptime | N/A | ⓘTags: Graph Theory, Greedy naptime | RI-HCI December Course Selection 2020 (cstuart) | Batch | 22 |
| buycomputer | N/A | ⓘTags: Greedy, Syntax buycomputer | Dec Trg 2019 (Elementary) (errorgorn) | Batch | 22 |
| ping | N/A | ⓘTags: Joke ping | RI HCI NOI Selection 2019 Practice (bensonlzl) | Interactive | 22 |
| assignpaths | N/A | ⓘTags: Binary Search, Graph Theory, Greedy, Trees assignpaths | USACO 2020 February Contest, Platinum | Batch | 22 |
| candies_joi | N/A | ⓘTags: Adhoc, Greedy candies_joi | JOI 2017/2018 Spring Camp | Batch | 22 |
| multipaths | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Multiple Paths | Dunjudge Archive | Batch | 22 |
| inversemax | N/A | ⓘTags: Bitmask, Dynamic Programming inversemax | Educational Round 3 (errorgorn) | Batch | 22 |
| duckduckgo | N/A | ⓘTags: Greedy duckduckgo | Codeforces 1091F | Batch | 22 |
| history | N/A | ⓘTags: Dynamic Programming history | Dunjudge Archive | Batch | 22 |
| gridgame | N/A | ⓘTags: Graph Theory gridgame | Dunjudge Archive | Batch | 22 |
| container | N/A | ⓘTags: Square Root Decomposition Shipping Containers | POI 2017 Round 2 Day 2 Q1 | Batch | 22 |
| lfs | N/A | ⓘTags: Dynamic Programming, Math Longest Factor Subsequence | Educational Round 5 (errorgorn) | Batch | 22 |
| bucketstacking | N/A | ⓘTags: Adhoc, Greedy Bucket Stacking | RI-HCI-NUSH NOI Selection Test 2021 (oolimry) | Batch | 22 |
| riggedroads | N/A | ⓘTags: Graph Theory, Greedy, Trees riggedroads | NOI 2019 | Batch | 22 |
| train_ex | N/A | ⓘTags: Dynamic Programming train_ex | Dunjudge Archive | Batch | 22 |
| tour | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory tour | NOI 2011 | Batch | 22 |
| removeedges | N/A | ⓘTags: Graph Theory removeedges | Atcoder | Batch | 22 |
| snakesnack2 | N/A | ⓘTags: Line Sweep/Sliding Window snakesnack2 | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch | 22 |
| change | N/A | ⓘTags: Greedy change | NOI 2011 | Batch | 21 |
| moosic | N/A | ⓘTags: Data Structures moosic | Codeforces Round #386 | Batch | 21 |
| deliveroo | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming, Greedy Deliveroo | RI November Course Stage 2 Selection Test 2021 (Deadeye) | Batch | 21 |
| treecutting | N/A | ⓘTags: Trees Tree Cutting | NOI 2022 Qualification | Batch | 21 |
| convexhull | N/A | ⓘTags: Data Structures Convex Hull | Classic Problem (ryangohca) | Batch | 21 |
| hole | N/A | ⓘTags: Binary Search, Dynamic Programming hole | Dunjudge Archive | Batch | 21 |
| cardtrick | N/A | ⓘTags: Data Structures Card Trick | Classic Problem (oolimry) | Batch | 21 |
| singleflip | N/A | ⓘTags: Syntax Single Flip | TROC 24 (maomao90) | Batch | 21 |
| addone | N/A | ⓘTags: Dynamic Programming Add One | Codeforces 1513C | Batch | 21 |
| rolling | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Rolling | Dunjudge Archive | Batch | 21 |
| promotion | N/A | ⓘTags: Data Structures, Graph Theory, Trees Promotion Counting | USACO 2017 Jan, Platinum | Batch | 20 |
| rubies | N/A | ⓘTags: Binary Search rubies | Dunjudge Archive (pwypeanut) | Batch | 20 |
| triusis | N/A | ⓘTags: Data Structures, Dynamic Programming Rabbit Carrot | Lithuanian Olympiad in Informatics 2019 | Batch | 20 |
| ducknuggetconvention | N/A | ⓘTags: Data Structures, Divide and Conquer Duck Nugget Convention | Valentines Contest 2021 (oolimry) | Batch | 20 |
| progression | N/A | ⓘTags: Data Structures, Implementation Cancer progression | NOI 2020 Finals | Batch | 20 |
| fuelstation | N/A | ⓘTags: Data Structures fuelstation | NOI 2020 Qualification | Batch | 20 |
| relaymarathon | N/A | ⓘTags: Brute Force, Graph Theory relaymarathon | NOI 2020 Qualification | Batch | 20 |
| doubletrouble | N/A | ⓘTags: Data Structures, Greedy Double Trouble | Dec Trg 2019 (Elementary) (oolimry) | Batch | 20 |
| bracketscore | N/A | ⓘTags: Greedy bracketscore | AGC48 | Batch | 20 |
| pokeadd | N/A | ⓘTags: Math pokeadd | Dunjudge Archive | Batch | 20 |
| toll | N/A | ⓘTags: Data Structures, Dynamic Programming toll | BOI 2017 | Batch | 20 |
| numericalstrings | N/A | ⓘTags: Greedy, Math numericalstrings | RI November Course Stage 2 Selection Test 2019 | Batch | 20 |
| selectingintervals | N/A | ⓘTags: Binary Search, Dynamic Programming selectingintervals | Codeforces 1055E | Batch | 20 |
| postcard | N/A | ⓘTags: Dynamic Programming postcard | Codeforces 4D | Batch | 20 |
| sortbooks | N/A | ⓘTags: Data Structures sortbooks | IZhO 2019 | Batch | 19 |
| feast | N/A | ⓘTags: Dynamic Programming, Greedy feast | NOI 2019 | Batch | 19 |
| firefighting | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees firefighting | NOI 2020 Qualification | Batch | 19 |
| lineup2 | N/A | ⓘTags: Syntax Lineup | RI Problem Setter Contest 2019 (rs) | Batch | 19 |
| gerrymandering | N/A | ⓘTags: Dynamic Programming Gerrymandering | Dec Course 2021 BAPS (beepbeepsheep) | Batch | 19 |
| fruits | N/A | ⓘTags: Data Structures, Greedy fruits | Dunjudge Archive | Batch | 19 |
| primesort | N/A | ⓘTags: Graph Theory, Math Prime Sort | Dunjudge Archive | Batch | 19 |
| ants | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees ants | Dunjudge Archive | Interactive | 19 |
| journey3 | N/A | ⓘTags: Dynamic Programming Journey | NOI 2018 | Batch | 19 |
| radioactive | N/A | ⓘTags: Divide and Conquer, Dynamic Programming radioactive | NOI 2015 | Batch | 19 |
| discharging | N/A | ⓘTags: Data Structures, Dynamic Programming discharging | NOI 2020 Finals | Batch | 19 |
| 1402 | N/A | ⓘTags: Adhoc, Joke 1402 | April Fools' 2021 (bensonlzl) | Batch | 19 |
| infiniteloop | N/A | ⓘTags: Graph Theory Infinite Looping Sequence | 2017 RI Dec Course Sel (pwypeanut) | Batch | 19 |
| dquery | N/A | ⓘTags: Data Structures, Square Root Decomposition dquery | Classic Problem | Batch | 18 |
| pythonindentation | N/A | ⓘTags: Dynamic Programming pythonindentation | Codeforces 909C | Batch | 18 |
| eexploration | N/A | ⓘTags: Graph Theory Elementary Exploration | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch | 18 |
| arrangetoys | N/A | ⓘTags: Graph Theory, Math Arranging Toy Displays | AGC 016D | Batch | 18 |
| baseplans_ex | N/A | ⓘTags: Data Structures baseplans_ex | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 18 |
| gymbadges | N/A | ⓘTags: Dynamic Programming, Greedy Gym Badges | NOI 2022 Finals | Batch | 18 |
| ihate1111 | N/A | ⓘTags: Adhoc, Math I Hate 1111 | Codeforces Round 723 (errorgorn) | Batch | 18 |
| parade | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees parade | Dunjudge Archive | Batch | 18 |
| bosubaiko | N/A | ⓘTags: Adhoc, Greedy Bosu Baiko | Educational Round 6 (errorgorn) | Batch | 18 |
| potionseasy | N/A | ⓘTags: Dynamic Programming, Greedy Potions (Easy Version) | Codeforces Round 723 (errorgorn, oolimry) | Batch | 18 |
| cudak | N/A | ⓘTags: Binary Search, Dynamic Programming cudak | COCI 2007/2008 | Batch | 18 |
| tourist | N/A | ⓘTags: Data Structures, Greedy tourist | IOI 2012 Practice Tasks | Batch | 18 |
| badnim | N/A | ⓘTags: Explicitly Excluded (from IOI), Math badnim | Educational Round 7 (errorgorn) | Batch | 18 |
| merchant_o | N/A | ⓘTags: Dynamic Programming, Slope Trick Merchant Otter | Dec Course 2020 BAPS | Batch | 18 |
| appeal | N/A | ⓘTags: Data Structures appeal | Dunjudge Archive | Batch | 18 |
| fencing | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window, Square Root Decomposition fencing | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch | 18 |
| skyline | N/A | ⓘTags: Graph Theory, Greedy skyline | HCI NOI Selection Retest 2020 (bensonlzl) | Batch | 18 |
| partitiongame | N/A | ⓘTags: Data Structures, Dynamic Programming Partition Game | Codeforces 1527E | Batch | 18 |
| horses | N/A | ⓘTags: Data Structures, Math horses | IOI 2015 | Interactive | 18 |
| openingshop | N/A | ⓘTags: Greedy Opening Shop | Dec Course 2021 BAPS (Halogen) | Batch | 18 |
| swap | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Swapping Cities | APIO 2020 | Interactive | 18 |
| appletree | N/A | ⓘTags: Graph Theory appletree | Dunjudge Archive | Batch | 18 |
| cake | N/A | ⓘTags: Brute Force, Data Structures cake | CEOI 2014 | Batch | 18 |
| indivisibility | N/A | ⓘTags: Math indivisibility | Dunjudge Archive | Batch | 18 |
| plagia | N/A | ⓘTags: Data Structures plagia | December Course 2018 Advanced Final Contest | Batch | 18 |
| votingcities | N/A | ⓘTags: Bitmask, Graph Theory Voting Cities | NOI 2022 Finals | Batch | 18 |
| artswap | N/A | ⓘTags: Data Structures artswap | HCI NOI Selection Retest 2020 (bensonlzl) | Interactive | 18 |
| berlandtaxi | N/A | ⓘTags: Data Structures, Implementation Cancer Berland.Taxi | NEERC 2017 Southern Subregional Contest | Batch | 17 |
| special | N/A | ⓘTags: Dynamic Programming special | Dunjudge Archive | Batch | 17 |
| firelord | N/A | ⓘTags: Dynamic Programming firelord | RI Nov Sel 2020 (jiahng) | Batch | 17 |
| puttingstrings | N/A | ⓘTags: Constructive Algorithms, Graph Theory puttingstrings | RI-HCI December Course Selection 2020 (rs) | Batch | 17 |
| sequence_apio | N/A | ⓘTags: Dynamic Programming Split the sequence | APIO 2014 | Batch | 17 |
| snowcow | N/A | ⓘTags: Data Structures, Graph Theory, Trees Snowcow | USACO 2019 December Contest Platinum | Batch | 17 |
| fourbuckets | N/A | ⓘTags: Adhoc, Math Four Buckets | Educational Round 6 (oolimry) | Batch | 17 |
| power | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees power | JOI | Batch | 17 |
| pillars | N/A | ⓘTags: Data Structures Pillars | RI December Course Selection Test 2021 (rs) | Batch | 17 |
| prefixgcd | N/A | ⓘTags: Adhoc, Brute Force, Math prefixgcd | Dec Course 2021 BAPS (jiahng) | Batch | 17 |
| pokenumbers | N/A | ⓘTags: Math pokenumbers | Dunjudge Archive | Batch | 17 |
| rebuild | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Greedy rebuild | RI-HCI-NUSH NOI Selection Test 2021 (shenxy13) | Interactive | 16 |
| snakesnack | N/A | ⓘTags: Dynamic Programming, Greedy snakesnack | Codeforces 1239E | Batch | 16 |
| nian | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Nian | 2020 CNY (oolimry) | Batch | 16 |
| dna | N/A | ⓘTags: Dynamic Programming DNA | APIO 2008 | Batch | 16 |
| jumper | N/A | ⓘTags: Brute Force, Data Structures, Line Sweep/Sliding Window Manhattan Jumper | HCI-NUSH NOI Selection 2022 (errorgorn) | Batch | 16 |
| rmq | N/A | ⓘTags: Data Structures, Greedy rmq | NOI 2017 | Batch | 16 |
| collectmushrooms4 | N/A | ⓘTags: Data Structures, Dynamic Programming collectmushrooms4 | Dunjudge Archive | Batch | 16 |
| divsum | N/A | ⓘTags: Math Divisor Sum | Educational Round 1 (errorgorn) | Batch | 16 |
| battleship | N/A | ⓘTags: Bitmask, Constructive Algorithms, Divide and Conquer Battleship | HCI-NUSH NOI Selection 2022 (errorgorn) | Interactive | 16 |
| race | N/A | ⓘTags: Divide and Conquer, Trees Race | IOI 2011 | Interactive | 16 |
| countingagain | N/A | ⓘTags: Dynamic Programming, Math Counting Again | ARC 104D | Batch | 16 |
| lppfnlcst | N/A | ⓘTags: Binary Search, Data Structures Lazy Propagation Persistant Fat Nodes Li Chao Segment Tree | Educational Round 1 (errorgorn) | Batch | 16 |
| potionshard | N/A | ⓘTags: Greedy Potions (Hard Version) | Codeforces Round 723 (errorgorn, oolimry) | Batch | 15 |
| warp | N/A | ⓘTags: Bitmask, Dynamic Programming warp | HCI NOI Selection Retest 2020 (bensonlzl) | Batch | 15 |
| fertile | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming fertile | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch | 15 |
| samelength | N/A | ⓘTags: Joke Same Length | Hello 2021 (errorgorn) | Batch | 15 |
| primepie | N/A | ⓘTags: Math primepie | Dunjudge Archive | Interactive | 15 |
| findandprevent | N/A | ⓘTags: Graph Theory, Trees Find and Prevent | Tuymaada 2021 | Batch | 15 |
| mugger | N/A | ⓘTags: Dynamic Programming mugger | RI Problem Setter Contest 2019 (ngmh) | Batch | 15 |
| bichrome | N/A | ⓘTags: Graph Theory, Math, Trees bichrome | Atcoder | Batch | 15 |
| bananafever | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees bananafever | Dunjudge Archive | Batch | 15 |
| modsum | N/A | ⓘTags: Dynamic Programming, Math modsum | NOI 2012 | Batch | 15 |
| mate | N/A | ⓘTags: Graph Theory mate | RSA Fun Contest (errorgorn) | Batch | 15 |
| bookshelf | N/A | ⓘTags: Data Structures bookshelf | Dunjudge Archive | Batch | 15 |
| interestring | N/A | ⓘTags: Dynamic Programming, Math interestring | RI-HCI December Course Selection 2020 (cstuart) | Batch | 15 |
| password | N/A | ⓘTags: Data Structures, Dynamic Programming, Greedy, Slope Trick password | NOI 2021 Finals | Batch | 15 |
| excombo | N/A | ⓘTags: Dynamic Programming, Greedy EX Combo | RSA Fun Contest (oolimry) | Batch | 15 |
| troubles | N/A | ⓘTags: Adhoc, Data Structures, Dynamic Programming troubles | Dunjudge Archive | Batch | 15 |
| strawberry | N/A | ⓘTags: Data Structures, Dynamic Programming Speedy Strawberries | 2020 CNY (shenxy13) | Batch | 14 |
| christmasturkeyfarm | N/A | ⓘTags: Data Structures Christmas Turkey Farming | Educational Round 2 (dillion) | Batch | 14 |
| monochromecat | N/A | ⓘTags: Graph Theory, Trees monochromecat | ARC 097 | Batch | 14 |
| spy | N/A | ⓘTags: Data Structures, Graph Theory, Trees spy | 2013 IOI Japan National Team Selection Test Day 2 | Batch | 14 |
| bombing | N/A | ⓘTags: Graph Theory bombing | Dunjudge Archive | Batch | 14 |
| village | N/A | ⓘTags: Graph Theory, Greedy, Trees village | BOI 2020 | Batch | 14 |
| xorb | N/A | ⓘTags: Math, Syntax xorb | Dunjudge Archive | Batch | 14 |
| arcade | N/A | ⓘTags: Adhoc, Data Structures, Dynamic Programming arcade | NOI 2020 Finals | Batch | 14 |
| stringsofimpurity | N/A | ⓘTags: Binary Search stringsofimpurity | AtCoder | Batch | 14 |
| globalwarming_ceoi | N/A | ⓘTags: Data Structures, Dynamic Programming Global warming | CEOI 2018 | Batch | 14 |
| triangles | N/A | ⓘTags: Graph Theory, Square Root Decomposition Counting Triangles | Classic Problem | Batch | 14 |
| inequality2 | N/A | ⓘTags: Adhoc, Constructive Algorithms inequality2 | Dec Course 2021 BAPS (zaneyu) | Batch | 14 |
| merchant | N/A | ⓘTags: Binary Search, Dynamic Programming, Graph Theory Travelling Merchant | APIO 2017 | Batch | 14 |
| robobear | N/A | ⓘTags: Graph Theory The Maze of RoboBear | Tuymaada 2021 | Batch | 14 |
| more_lca | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees More LCA | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Interactive | 14 |
| supperbox | N/A | ⓘTags: Divide and Conquer, Dynamic Programming Estelle’s Supper Box | RI-HCI NOI Selection Test 2018 | Batch | 14 |
| seedflare | N/A | ⓘTags: Information Theory Seed Flare | SGP Sparring 2021 (lovemathboy) | Interactive | 14 |
| potatoqueue | N/A | ⓘTags: Data Structures potatoqueue | Dunjudge Archive | Interactive | 14 |
| foodchain | N/A | ⓘTags: Math, Syntax Food Chain | Dec Trg 2019 (Elementary) | Batch | 13 |
| cave | N/A | ⓘTags: Binary Search cave | IOI 2013 | Interactive | 13 |
| jumping2 | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Jumping | Dunjudge Archive | Batch | 13 |
| catnames | N/A | ⓘTags: Math catnames | RI/RJC NOI Selection Test 2016 | Batch | 13 |
| kickingshoes | N/A | ⓘTags: Data Structures, Greedy, Math Kicking Shoes | Educational Round 4 (maomao90) | Batch | 13 |
| funfair | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Funfair | Educational Round 5 (rs) | Batch | 13 |
| iqtest2 | N/A | ⓘTags: Math iqtest2 | April Fools' 2022 (errorgorn) | Batch | 13 |
| mining | N/A | ⓘTags: Graph Theory mining | Dunjudge Archive | Batch | 13 |
| tiles | N/A | ⓘTags: Bitmask, Data Structures, Dynamic Programming tiles | NOI 2021 Finals | Batch | 13 |
| wabbitosu | N/A | ⓘTags: Adhoc, Data Structures, Greedy Wabbit osu!taiko | HCI December Course Selection 2021 (bensonlzl) | Batch | 13 |
| minimetro | N/A | ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window Minimetro | HCI December Course Selection 2021 (huangqr) | Batch | 13 |
| pancake | N/A | ⓘTags: Brute Force, Graph Theory pancake | NOI 2012 | Batch | 13 |
| lemonadestand | N/A | ⓘTags: Greedy lemonadestand | Dunjudge Archive | Batch | 13 |
| truck | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Implementation Cancer, Math, Trees truck | NOI 2021 Qualification | Batch | 13 |
| rabbitlineup | N/A | ⓘTags: Divide and Conquer, Dynamic Programming rabbitlineup | Dunjudge Archive | Batch | 13 |
| duckwalk | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming duckwalk | Codeforces 76F | Batch | 13 |
| catteams | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming catteams | RI/RJC NOI Selection Test 2016 | Batch | 13 |
| planning | N/A | ⓘTags: Graph Theory, Greedy, Trees Company Planning | TOKI Open 2014 | Batch | 13 |
| binomial | N/A | ⓘTags: Math binomial | Dunjudge Archive | Batch | 13 |
| adjacentswaps | N/A | ⓘTags: Brute Force, Greedy Adjacent Swaps | Dunjudge Archive (shenxy13) | Batch | 13 |
| surnames | N/A | ⓘTags: Dynamic Programming, Graph Theory, Implementation Cancer, Square Root Decomposition, Trees Surnames | 2020 CNY (errorgorn) | Batch | 13 |
| republiccity | N/A | ⓘTags: Graph Theory Republic City | RI Nov Sel 2020 (JustAWallaby) | Batch | 13 |
| malcolm | N/A | ⓘTags: Line Sweep/Sliding Window malcolm | COCI 2012/2013 | Batch | 13 |
| radiance | N/A | ⓘTags: Square Root Decomposition radiance | RSA Fun Contest (oolimry) | Batch | 12 |
| hdb | N/A | ⓘTags: Data Structures, Dynamic Programming hdb | Dunjudge Archive | Batch | 12 |
| delivery | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory delivery | Dunjudge Archive | Batch | 12 |
| vouchers | N/A | ⓘTags: Dynamic Programming vouchers | Dunjudge Archive | Batch | 12 |
| rabbitbars | N/A | ⓘTags: Binary Search, Data Structures, Divide and Conquer, Dynamic Programming rabbitbars | Dunjudge Archive (bensonlzl) | Batch | 12 |
| jumps | N/A | ⓘTags: Data Structures, Greedy Rainforest Jumps | APIO 2021 (bensonlzl) | Interactive | 12 |
| historical | N/A | ⓘTags: Square Root Decomposition Historical | JOI 2013/2014 | Batch | 12 |
| more_lca2 | N/A | ⓘTags: Graph Theory, Trees More LCA 2 | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Interactive | 12 |
| cakerun | N/A | ⓘTags: Data Structures Bowen's Cake Run | December Course 2019 Advanced Final Contest (rs) | Batch | 12 |
| midas | N/A | ⓘTags: Graph Theory, Trees Midas | POI 2017 Round 3 Day 1 Q1 | Batch | 12 |
| divsum_dec18 | N/A | ⓘTags: Math Divsum | RI Deccourse 2018 Selection Test (eutroph) | Batch | 12 |
| robots | N/A | ⓘTags: Binary Search, Greedy robots | IOI 2013 | Interactive | 12 |
| shikandgame | N/A | ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window shikandgame | AGC 007 | Batch | 12 |
| badknapsack | N/A | ⓘTags: Brute Force, Dynamic Programming badknapsack | Educational Round 3 (errorgorn) | Batch | 12 |
| orangeroad | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window orangeroad | Educational Round 9 (jamessng, jamielim) | Batch | 12 |
| colorgraph | N/A | ⓘTags: Graph Theory colorgraph | uwu (errorgorn) | Batch | 12 |
| cloudcomputing | N/A | ⓘTags: Dynamic Programming Cloud computing | CEOI 2018 | Batch | 12 |
| exoticplants | N/A | ⓘTags: Graph Theory Exotic Plants | Luogu P4568 [JLOI2011] | Batch | 12 |
| duels | N/A | ⓘTags: Adhoc, Data Structures duels | Educational Round 9 (maomao90, jamessng) | Batch | 12 |
| dreaming | N/A | ⓘTags: Graph Theory dreaming | IOI 2013 | Interactive | 12 |
| selfpermutation | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming selfpermutation | TOKI KSN Day 2 | Batch | 12 |
| naan | N/A | ⓘTags: Greedy, Math naan | JOI 2018/2019 Spring Camp | Batch | 12 |
| jams | N/A | ⓘTags: Data Structures Jams | Algorithm Class Mini-Contest 8 | Batch | 12 |
| orangecollector | N/A | ⓘTags: Bitmask, Data Structures, Dynamic Programming Orange Collector | RI-HCI December Course Selection 2019 (rs) | Batch | 11 |
| mergers | N/A | ⓘTags: Adhoc, Data Structures, Graph Theory, Trees mergers | JOI | Batch | 11 |
| installingapps | N/A | ⓘTags: Dynamic Programming, Greedy Installing Apps | NWERC 2017 | Batch | 11 |
| distribution | N/A | ⓘTags: Bitmask, Constructive Algorithms, Meet in the Middle Distribution | Codechef January Cook-Off 2021 | Batch | 11 |
| skyscraper_apio15 | N/A | ⓘTags: Graph Theory, Square Root Decomposition Jakarta Skyscrapers | APIO 2015 | Batch | 11 |
| boring | N/A | ⓘTags: Dynamic Programming boring | Dunjudge Archive | Batch | 11 |
| lopov | N/A | ⓘTags: Data Structures lopov | COCI 2013/2014 | Batch | 11 |
| segmenttree3 | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window segmenttree3 | Dec Course 2021 Intermediate Contest 4 (Data Structures III) (errorgorn, oolimry) | Batch | 11 |
| rabbitpainting | N/A | ⓘTags: Greedy rabbitpainting | Dunjudge Archive (bensonlzl) | Batch | 11 |
| paint_apio | N/A | ⓘTags: Adhoc, Line Sweep/Sliding Window, Square Root Decomposition paint_apio | APIO 2020 | Interactive | 11 |
| baseplans | N/A | ⓘTags: Adhoc Base Plans | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 11 |
| solarstorm | N/A | ⓘTags: Graph Theory, Line Sweep/Sliding Window, Trees Solar Storm | NOI 2020 Prelims | Batch | 11 |
| hotspot | N/A | ⓘTags: Graph Theory hotspot | NOI 2017 | Batch | 11 |
| outing | N/A | ⓘTags: Data Structures Outing | Educational Round 10 (Goodbye cstuart and kai824) (kai824) | Batch | 11 |
| christmastree | N/A | ⓘTags: Graph Theory, Trees Christmas Tree | Educational Round 2 (errorgorn, oolimry) | Batch | 11 |
| hacker | N/A | ⓘTags: Data Structures, Greedy, Line Sweep/Sliding Window hacker | BOI 2015 | Batch | 11 |
| visitingsingapore | N/A | ⓘTags: Dynamic Programming, Implementation Cancer Visiting Singapore | NOI 2020 Prelims | Batch | 11 |
| streetlamps | N/A | ⓘTags: Data Structures, Divide and Conquer, Implementation Cancer Street Lamps | APIO 2019 | Batch | 11 |
| chocolate | N/A | ⓘTags: Dynamic Programming chocolate | Dunjudge Archive | Batch | 11 |
| ragingthunder | N/A | ⓘTags: Data Structures, Implementation Cancer Raging Thunder | Codeforces | Batch | 11 |
| snail | N/A | ⓘTags: Adhoc, Implementation Cancer, Syntax Snail | NOI 2018 Prelims | Batch | 11 |
| mamamintaplusa | N/A | ⓘTags: Greedy mama MINta PLUSa | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch | 11 |
| invasion | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Line Sweep/Sliding Window, Trees invasion | Dunjudge Archive | Batch | 11 |
| bracketflip | N/A | ⓘTags: Data Structures, Line Sweep/Sliding Window, Math bracketflip | Dec Course 2020 BAPS (pavement) | Batch | 11 |
| closedrooms | N/A | ⓘTags: Adhoc, Graph Theory closedrooms | AtCoder Regular Contest 014 | Batch | 11 |
| candyshop | N/A | ⓘTags: Data Structures candyshop | Classic Problem | Batch | 11 |
| cashmoney | N/A | ⓘTags: Math Cash Money | 2020 CNY | Batch | 10 |
| werewolf | N/A | ⓘTags: Data Structures, Graph Theory, Trees Werewolf | IOI 2018 | Interactive | 10 |
| combo | N/A | ⓘTags: Adhoc Combo | IOI 2018 | Interactive | 10 |
| bubblesort | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Bubble Sort | Educational Round 4 (jamessng, zaneyu, oolimry) | Batch | 10 |
| 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 | 10 |
| mercurypoisoning | N/A | ⓘTags: Graph Theory Mercury Poisoning | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 10 |
| routes | N/A | ⓘTags: Adhoc, Graph Theory routes | Dunjudge Archive | Batch | 10 |
| cycling | N/A | ⓘTags: Graph Theory, Trees cycling | Dunjudge Archive | Batch | 10 |
| flood | N/A | ⓘTags: Graph Theory, Math Flood | POI 2018 Round 1 Q3 | Batch | 10 |
| rabbittolls | N/A | ⓘTags: Graph Theory rabbittolls | Dunjudge Archive | Batch | 10 |
| selfdefence | N/A | ⓘTags: Dynamic Programming Self Defence | TOKI KSN Day 1 | Batch | 10 |
| departure | N/A | ⓘTags: Data Structures, Greedy, Implementation Cancer departure | NOI 2021 Qualification | Batch | 10 |
| boxes_hkicpc | N/A | ⓘTags: Graph Theory, Trees Boxes | 2016 ACM ICPC Asia Hong Kong Regional | Batch | 10 |
| wall | N/A | ⓘTags: Data Structures wall | IOI 2014 | Interactive | 10 |
| pandaski | N/A | ⓘTags: Data Structures, Dynamic Programming, Implementation Cancer pandaski | NOI 2016 | Batch | 10 |
| supertrees | N/A | ⓘTags: Adhoc, Constructive Algorithms, Graph Theory Connecting Supertrees | IOI 2020 | Interactive | 10 |
| inequality | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming, Implementation Cancer, Line Sweep/Sliding Window inequality | RI-HCI NOI Selection Test 2020 (0rang3) | Batch | 10 |
| bridges_apio19 | N/A | ⓘTags: Graph Theory, Square Root Decomposition Bridges | APIO 2019 | Batch | 10 |
| laughter | N/A | ⓘTags: Binary Search, Data Structures, Implementation Cancer, Line Sweep/Sliding Window laughter | Educational Codeforces Round 27 | Batch | 10 |
| kthsubstring | N/A | ⓘTags: Adhoc kthsubstring | ARC 097 | Batch | 10 |
| collaboration | N/A | ⓘTags: Data Structures, Graph Theory, Trees Collaboration | December Course 2019 Advanced Final Contest (0rang3) | Interactive | 10 |
| woodcutter | N/A | ⓘTags: Brute Force, Data Structures Woodcutter | Codeforces 527C (modified) | Interactive | 10 |
| catleap | N/A | ⓘTags: Graph Theory catleap | Dunjudge Archive | Batch | 10 |
| equals | N/A | ⓘTags: Graph Theory equals | ARC 097 | Batch | 10 |
| goodseq | N/A | ⓘTags: Data Structures goodseq | Dunjudge Archive | Batch | 10 |
| threetowers | N/A | ⓘTags: Brute Force, Greedy threetowers | POI 2015 Round 2 Day 2 Q2 | Batch | 10 |
| gwynethandtree | N/A | ⓘTags: Explicitly Excluded (from IOI), Graph Theory, Trees Gwyneth and Tree | Codeforces 199E (Div 2) | Batch | 10 |
| sailor | N/A | ⓘTags: Graph Theory sailor | CPSPC 2010 | Batch | 10 |
| scrivener | N/A | ⓘTags: Data Structures Crayfish scrivener | IOI 2012 | Interactive | 9 |
| strangedevice | N/A | ⓘTags: Data Structures, Math Strange Device | APIO 2019 | Batch | 9 |
| tickets | N/A | ⓘTags: Adhoc, Data Structures Carnival Tickets | IOI 2020 | Interactive | 9 |
| collectmushrooms5 | N/A | ⓘTags: Greedy collectmushrooms5 | Dunjudge Archive | Batch | 9 |
| thanossort | N/A | ⓘTags: Adhoc, Divide and Conquer thanossort | RSA Fun Contest (errorgorn) | Interactive | 9 |
| summarizing2021 | N/A | ⓘTags: Explicitly Excluded (from IOI) 🗿🗿🗿 | Hello 2022 (errorgorn) | Interactive | 9 |
| rabbitbridges | N/A | ⓘTags: Binary Search, Graph Theory Rabbit Bridges | Educational Round 5 (oolimry) | Batch | 9 |
| acorns | N/A | ⓘTags: Data Structures acorns | MCO 2016 | Batch | 9 |
| wires | N/A | ⓘTags: Adhoc Wires | RI-HCI NOI Selection Test 2019 (bensonlzl) | Interactive | 9 |
| magick | N/A | ⓘTags: Adhoc, Information Theory, Math Magick | RI-HCI NOI Selection Test 2019 | Communication | 9 |
| lambsrespite | N/A | ⓘTags: Data Structures Lamb's Respite | XXII Open Cup. Grand Prix of Korea | Batch | 9 |
| dragonfly | N/A | ⓘTags: Data Structures, Trees dragonfly | NOI 2022 Qualification (bensonlzl) | Batch | 9 |
| sawmills | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Two Sawmills | CEOI 2004 | Batch | 9 |
| catgameshow | N/A | ⓘTags: Data Structures catgameshow | RI/RJC NOI Selection Test 2016 | Batch | 9 |
| rarwall | N/A | ⓘTags: Data Structures rarwall | Dunjudge Archive | Interactive | 9 |
| istj | N/A | ⓘTags: Data Structures, Trees ISTJ | 2020 CNY, Classic Problem (0rang3, shenxy13) | Batch | 9 |
| edgeflip | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Edge Flipping | Educational Round 4 (jamessng) | Batch | 9 |
| hellokitty | N/A | ⓘTags: Binary Search, Data Structures, Math hellokitty | Dunjudge Archive | Batch | 9 |
| bitaro | N/A | ⓘTags: Dynamic Programming, Graph Theory, Square Root Decomposition Bitaro's Party | JOI 2017/2018 Spring Camp | Batch | 9 |
| straight | N/A | ⓘTags: Bitmask, Dynamic Programming Pure Straight | ARC 126 | Batch | 9 |
| safety | N/A | ⓘTags: Dynamic Programming, Slope Trick Safety | NOI 2018 | Batch | 9 |
| ohbabyntriples | N/A | ⓘTags: Binary Search, Data Structures, Greedy Oh Baby, n Triples! | IOI 2020 Practice Session | Batch | 9 |
| roots | N/A | ⓘTags: Data Structures, Graph Theory, Trees roots | Codeforces 695E | Batch | 9 |
| doubleflip | N/A | ⓘTags: Adhoc Double Flip | TROC 24 (errorgorn) | Batch | 9 |
| stoningame | N/A | ⓘTags: Math stoningame | Valentine's Day Contest 2022 (maomao90) | Batch | 9 |
| uniquepath | N/A | ⓘTags: Graph Theory uniquepath | AGC38D | Batch | 9 |
| makemst | N/A | ⓘTags: Graph Theory, Math makemst | Codeforces 1088F | Batch | 9 |
| colourblind | N/A | ⓘTags: Graph Theory colourblind | HCI NOI Selection Retest 2020 (bensonlzl) | Interactive | 9 |
| secret | N/A | ⓘTags: Divide and Conquer, Information Theory Secret | JOI Open 2014 | Interactive | 9 |
| holdinghands | N/A | ⓘTags: Graph Theory, Implementation Cancer, Trees holdinghands | Dec Course 2020 BAPS (jiahng) | Batch | 9 |
| jjooii2 | N/A | ⓘTags: Adhoc jjooii2 | JOI 2020 Final Round | Batch | 8 |
| robot | N/A | ⓘTags: Data Structures Robots | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch | 8 |
| rockclimbing | N/A | ⓘTags: Graph Theory rockclimbing | NOI 2016 | Batch | 8 |
| spiderweb | N/A | ⓘTags: Dynamic Programming, Graph Theory spiderweb | Dunjudge Archive | Batch | 8 |
| towers_noi | N/A | ⓘTags: Constructive Algorithms, Data Structures, Greedy Towers | NOI 2022 Finals | Batch | 8 |
| weightedguess | N/A | ⓘTags: Dynamic Programming Weighted Guess | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Interactive | 8 |
| mobitel | N/A | ⓘTags: Dynamic Programming, Square Root Decomposition Mobitel | COCI 2018/2019 | Batch | 8 |
| funnytree | N/A | ⓘTags: Graph Theory, Trees Funny Tree (Extreme Version) | RuCode 2020 Div A (Extreme Version) (0rang3, rs) | Batch | 8 |
| roads | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Road Closures | APIO 2021 | Interactive | 8 |
| digitsum | N/A | ⓘTags: Dynamic Programming digitsum | UOJ Easy Round #4 | Batch | 8 |
| bombing2 | N/A | ⓘTags: Graph Theory bombing2 | Dunjudge Archive | Batch | 8 |
| mememagic | N/A | ⓘTags: Dynamic Programming mememagic | Dunjudge Archive | Batch | 8 |
| rabbitroad | N/A | ⓘTags: Binary Search, Graph Theory, Greedy, Trees RabbitRoad | RI-HCI December Course Selection 2019 (bensonlzl) | Batch | 8 |
| haiku | N/A | ⓘTags: Dynamic Programming Iroha and Haiku | AtCoder | Batch | 8 |
| frisbee | N/A | ⓘTags: Data Structures, Dynamic Programming, Slope Trick Frisbee Training | 2019 IOI Problem Setter Contest (0rang3) | Batch | 8 |
| hop | N/A | ⓘTags: Math hop | COCI 2020/2021 Contest #4 Problem 3 | Batch | 8 |
| hunter | N/A | ⓘTags: Graph Theory, Trees Hunter | Dunjudge Archive (bensonlzl) | Interactive | 8 |
| catalansum | N/A | ⓘTags: Explicitly Excluded (from IOI), Math catalansum (EE) | Educational Round 3 (errorgorn, oolimry) | Batch | 8 |
| airline | N/A | ⓘTags: Graph Theory, Information Theory airline | JOISC 2018, Day 3 | Communication | 8 |
| prisoners | N/A | ⓘTags: Adhoc, Graph Theory, Information Theory prisoners | APIO 2014 Mock Contest | Communication | 7 |
| christmasfiboseq | N/A | ⓘTags: Math Chirstmas Fibonacci Sequence | Educational Round 2 (errorgorn) | Batch | 7 |
| pekora | N/A | ⓘTags: Greedy Pekora and Trampoline | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch | 7 |
| luckynumbers2 | N/A | ⓘTags: Math luckynumbers2 | Dec Course Final Contest 2017 | Batch | 7 |
| trivialmaths | N/A | ⓘTags: Explicitly Excluded (from IOI), Math trivialmaths | Valentines Contest 2021 (errorgorn) | Interactive | 7 |
| thanossort_st4 | N/A | ⓘTags: Adhoc, Divide and Conquer, Explicitly Excluded (from IOI) thanossort_st4 | RSA Fun Contest (errorgorn) | Interactive | 7 |
| flowering | N/A | ⓘTags: Data Structures flowering | COCI 2008/2009 | Batch | 7 |
| aesthetic | N/A | ⓘTags: Data Structures, Graph Theory aesthetic | NOI 2020 Finals | Batch | 7 |
| books | N/A | ⓘTags: Graph Theory, Greedy Ancient Books | IOI 2017 | Interactive | 7 |
| luckynumbers | N/A | ⓘTags: Adhoc, Dynamic Programming Lucky Numbers | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch | 7 |
| sardines | N/A | ⓘTags: Data Structures, Dynamic Programming sardines | RI NOI Selection Test 2014 | Batch | 7 |
| biscuits | N/A | ⓘTags: Dynamic Programming, Math Packing Biscuits | IOI 2020 (Day 2) | Interactive | 7 |
| trains_mco | N/A | ⓘTags: Graph Theory, Greedy trains_mco | MCO 2015 | Batch | 7 |
| xortree | N/A | ⓘTags: Data Structures xortree | Classic Problem (errorgorn) | Batch | 7 |
| schedule | N/A | ⓘTags: Dynamic Programming, Graph Theory schedule | HCI NOI Selection Test 2014 | Batch | 7 |
| umbrella | N/A | ⓘTags: Dynamic Programming umbrella | USACO Silver Dec 2011 | Batch | 7 |
| burger | N/A | ⓘTags: Greedy burger | Code Jam to I/O 2018 for Women | Batch | 7 |
| ufo | N/A | ⓘTags: Dynamic Programming ufo | Dunjudge Archive | Batch | 7 |
| goodmorning | N/A | ⓘTags: Graph Theory Good Morning | ISC 2020 practice (errorgorn) | Batch | 7 |
| island | N/A | ⓘTags: Graph Theory, Math Island | NOI 2018 Prelims | Batch | 7 |
| archaeologist | N/A | ⓘTags: Adhoc archaeologist | NOI 2021 Finals | Interactive | 7 |
| judgeantibreaker | N/A | ⓘTags: Binary Search, Square Root Decomposition judgeantibreaker | Educational Round 6 (oolimry) | Batch | 7 |
| coolinteractive | N/A | ⓘTags: Adhoc Cool Interactive | Educational Round 8 (Goodbye oolimry) (errorgorn) | Interactive | 7 |
| molecules | N/A | ⓘTags: Adhoc, Line Sweep/Sliding Window Detecting Molecules | IOI 2016 | Interactive | 7 |
| wandering | N/A | ⓘTags: Data Structures, Graph Theory, Trees wandering | AGC 029 | Batch | 7 |
| garden_ioi08 | N/A | ⓘTags: Dynamic Programming Linear Garden | IOI 2008 | Batch | 7 |
| inequality3 | N/A | ⓘTags: Data Structures Social Inequality | TOKI Open 2014 | Batch | 7 |
| blanko | N/A | ⓘTags: Data Structures, Greedy blanko | Dunjudge Archive | Batch | 7 |
| sonya | N/A | ⓘTags: Dynamic Programming, Slope Trick Sonya and Problem Wihtout A Legend | Codeforces 713C | Batch | 7 |
| askonegetonefree | N/A | ⓘTags: Dynamic Programming AskOneGetOneFree | NOI 2015 | Interactive | 6 |
| escape | N/A | ⓘTags: Bitmask, Brute Force, Graph Theory Escape | UWCOI 2020 (socho, astoria, kimbj0709) | Batch | 6 |
| aliens_ioi | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming Aliens | IOI 2016 | Interactive | 6 |
| qualitycontrol | N/A | ⓘTags: Graph Theory, Trees Quality Control | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Batch | 6 |
| grapevine | N/A | ⓘTags: Data Structures, Divide and Conquer, Explicitly Excluded (from IOI), Graph Theory, Trees Grapevine | NOI 2022 Finals | Batch | 6 |
| cards | N/A | ⓘTags: Data Structures cards | Dunjudge Archive | Batch | 6 |
| doll | N/A | ⓘTags: Adhoc, Constructive Algorithms Mechanical Doll | IOI 2018 | Interactive | 6 |
| goodsubsegments | N/A | ⓘTags: Data Structures goodsubsegments | Codeforces Round #493 (Div. 1) | Batch | 6 |
| fire | N/A | ⓘTags: Data Structures fire | JOI 2020 Final Round | Batch | 6 |
| animaleditor | N/A | ⓘTags: Data Structures animaleditor | MCO | Batch | 6 |
| snukethewizard | N/A | ⓘTags: Adhoc, Binary Search snukethewizard | AtCoder | Batch | 6 |
| rabbitplane | N/A | ⓘTags: Binary Search rabbitplane | RI Problem Setter Contest 2019 (bensonlzl) | Batch | 6 |
| toblerone | N/A | ⓘTags: Brute Force, Dynamic Programming, Greedy toblerone | HCI Mock NOI 2015 | Batch | 6 |
| dominoes | N/A | ⓘTags: Binary Search, Data Structures, Square Root Decomposition dominoes | Educational Round 9 (maomao90, zaneyu) | Batch | 6 |
| circleselection | N/A | ⓘTags: Data Structures, Math Circle selection | APIO 2018 | Batch | 6 |
| aliens | N/A | ⓘTags: Data Structures aliens | Dunjudge Archive | Batch | 6 |
| cousin | N/A | ⓘTags: Graph Theory, Trees cousin | Dunjudge Archive | Interactive | 6 |
| kusac | N/A | ⓘTags: Math, Syntax kusac | COCI 2013/2014 | Batch | 6 |
| coingame | N/A | ⓘTags: Adhoc, Explicitly Excluded (from IOI) coingame | NTST 2015 | Batch | 6 |
| decayedbridges | N/A | ⓘTags: Graph Theory decayedbridges | Dunjudge Archive | Batch | 6 |
| badtree | N/A | ⓘTags: Binary Search, Data Structures badtree | RI-HCI December Course Selection 2019 (bensonlzl) | Batch | 6 |
| garden_ioi05 | N/A | ⓘTags: Brute Force, Dynamic Programming Garden | IOI 2005 | Batch | 6 |
| workload2 | N/A | ⓘTags: Square Root Decomposition Workload 2 | Dec Course 2021 Intermediate Contest 4 (Data Structures III) (errorgorn) | Batch | 6 |
| newhome | N/A | ⓘTags: Divide and Conquer, Implementation Cancer New Home | APIO 2018 | Batch | 5 |
| prefixsums2 | N/A | ⓘTags: Math Prefix Sums 2 | Educational Round 10 (Goodbye cstuart and kai824) (errorgorn) | Batch | 5 |
| harbingers | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees harbingers | CEOI 2009 | Batch | 5 |
| pokemonmaster | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Implementation Cancer, Square Root Decomposition, Trees I want to be the very best too! | NOI 2017 | Batch | 5 |
| badnim3 | N/A | ⓘTags: Bitmask, Explicitly Excluded (from IOI), Math Bad Nim 3 (EE) | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch | 5 |
| lampposts | N/A | ⓘTags: Binary Search lampposts | Dunjudge Archive | Interactive | 5 |
| rating | N/A | ⓘTags: Adhoc, Math Rating Changes | Dec Trg 2019 (Elementary) | Batch | 5 |
| compact | N/A | ⓘTags: Data Structures, Dynamic Programming compact | Dunjudge Archive | Batch | 5 |
| tournament | N/A | ⓘTags: Graph Theory, Trees tournament | IOI 2012 | Interactive | 5 |
| chunlian | N/A | ⓘTags: Data Structures chunlian | Dunjudge Archive | Batch | 5 |
| thunderstorm | N/A | ⓘTags: Data Structures, Greedy Thunderstorm | Dec Trg 2019 (Elementary) | Batch | 5 |
| wiring | N/A | ⓘTags: Adhoc, Greedy Fix Wiring | Polish Collegiate Programming Contest 2021 | Batch | 5 |
| firecracker | N/A | ⓘTags: Data Structures, Greedy firecracker | CNY Contest 2019 | Batch | 5 |
| factories | N/A | ⓘTags: Data Structures, Divide and Conquer, Explicitly Excluded (from IOI), Graph Theory, Trees factories | JOI 2014 Open | Interactive | 5 |
| niangao | N/A | ⓘTags: Data Structures Nian Gao | 2020 CNY (errorgorn) | Batch | 5 |
| mice | N/A | ⓘTags: Graph Theory mice | Dunjudge Archive | Batch | 5 |
| alien9 | N/A | ⓘTags: Adhoc, Dynamic Programming, Math alien9 | IMO Shortlist 1996 | Batch | 5 |
| atm | N/A | ⓘTags: Graph Theory The Great ATM Robbery | APIO 2009 | Batch | 5 |
| grassplant | N/A | ⓘTags: Data Structures, Explicitly Excluded (from IOI), Graph Theory, Trees Grass Planting | Dunjudge Archive | Batch | 5 |
| latex | N/A | ⓘTags: Data Structures, Dynamic Programming latex | RI Deccourse 2018 Selection Test | Batch | 5 |
| fireworks | N/A | ⓘTags: Dynamic Programming, Graph Theory, Slope Trick, Trees Fireworks | APIO 2016 | Batch | 5 |
| switches2 | N/A | ⓘTags: Dynamic Programming, Math switches2 | Educational Round 7 (errorgorn) | Batch | 5 |
| fun | N/A | ⓘTags: Adhoc, Graph Theory, Information Theory, Trees Fun Tour | APIO 2020 | Interactive | 5 |
| ponteng | N/A | ⓘTags: Math, Square Root Decomposition Ponteng | 2019 IOI Problem Setter Contest | Batch | 5 |
| cp2booksales | N/A | ⓘTags: Line Sweep/Sliding Window cp2booksales | Dunjudge Archive | Batch | 5 |
| sortedandsorted | N/A | ⓘTags: Data Structures, Dynamic Programming sortedandsorted | ARC 097 | Batch | 5 |
| permutationswap | N/A | ⓘTags: Adhoc permutationswap | Valentine's Day Contest 2022 (maomao90) | Batch | 5 |
| candies_ioi | N/A | ⓘTags: Data Structures Distributing Candies | IOI 2021 | Interactive | 5 |
| christmaswall | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Christmas Wall (EE) | Educational Round 2 (maomao90) | Batch | 5 |
| sandwich | N/A | ⓘTags: Divide and Conquer, Implementation Cancer Sandwich | HCI-NUSH NOI Selection 2022 (errorgorn, oolimry, yanhao) | Batch | 5 |
| blocks | N/A | ⓘTags: Information Theory, Math Blocks | UWCOI 2020 (socho, astoria, kimbj0709) | Interactive | 5 |
| portals | N/A | ⓘTags: Data Structures, Graph Theory portals | USACO 2021 US Open, Gold | Batch | 4 |
| collectingstamps3 | N/A | ⓘTags: Dynamic Programming collectingstamps3 | JOI 2020 Final Round | Batch | 4 |
| flooding | N/A | ⓘTags: Graph Theory flooding | Dunjudge Archive | Batch | 4 |
| cheaters | N/A | ⓘTags: Explicitly Excluded (from IOI), Math cheaters | Educational Round 3 (errorgorn) | Batch | 4 |
| elephants | N/A | ⓘTags: Binary Search, Square Root Decomposition Elephants | IOI 2011 | Interactive | 4 |
| birthday | N/A | ⓘTags: Explicitly Excluded (from IOI), Math birthday | RI Problem Setter Contest 2019 (syy) | Batch | 4 |
| sale | N/A | ⓘTags: Data Structures, Greedy sale | Dunjudge Archive | Batch | 4 |
| duathlon | N/A | ⓘTags: Graph Theory, Trees Duathlon | APIO 2018 | Batch | 4 |
| monke | N/A | ⓘTags: Math Monke | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch | 4 |
| housevisit | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees housevisit | CNY Contest 2019 (bensonlzl) | Batch | 4 |
| climatechange | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming climatechange | Dunjudge Archive | Batch | 4 |
| chess | N/A | ⓘTags: Adhoc, Bitmask, Data Structures chess | NUSH ISC 2018 | Batch | 4 |
| persistentlists | N/A | ⓘTags: Binary Search, Data Structures, Square Root Decomposition Persistent Lists | Educational Round 6 (oolimry) | Batch | 4 |
| suffixarray | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Oolimry and Suffix Array | Codeforces Round 723 (zaneyu) | Batch | 4 |
| bunchlocks | N/A | ⓘTags: Graph Theory bunchlocks | Dunjudge Archive | Batch | 4 |
| wallisstop | N/A | ⓘTags: Binary Search, Data Structures, Graph Theory Wall Is Stop | Dunjudge Archive (bensonlzl) | Batch | 4 |
| messy | N/A | ⓘTags: Binary Search Unscrambling a Messy Bug | IOI 2016 | Interactive | 4 |
| tents | N/A | ⓘTags: Dynamic Programming Tents | JOI 2017/2018 Spring Camp | Batch | 4 |
| sillysort | N/A | ⓘTags: Math sillysort | info(1) cup 2019 (modified) (errorgorn) | Batch | 4 |
| dungeons2 | N/A | ⓘTags: Binary Search, Data Structures dungeons2 | AGM 2021, Final Round, Day 2 | Batch | 4 |
| queuestack | N/A | ⓘTags: Adhoc, Data Structures Queuestack | Educational Round 10 (Goodbye cstuart and kai824) (lida, oolimry, cstuart) | Batch | 4 |
| badnim2 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Bad Nim 2 (EE) | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch | 4 |
| joke | N/A | ⓘTags: Graph Theory Joke | Dec Trg 2019 (Elementary) | Batch | 4 |
| shopping | N/A | ⓘTags: Dynamic Programming Shopping | Dunjudge Archive | Batch | 4 |
| 3dhistogram | N/A | ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming 3D Histogram | COCI 2020 | Batch | 4 |
| fencing2 | N/A | ⓘTags: Data Structures, Implementation Cancer fencing2 | RI-HCI December Course Selection 2020 (errorgorn) | Batch | 4 |
| garaza | N/A | ⓘTags: Data Structures, Math garaza | COCI | Batch | 4 |
| rabbitmeeting | N/A | ⓘTags: Adhoc, Greedy RabbitMeeting | December Course 2018 Advanced Final Contest | Batch | 4 |
| workload_ex | N/A | ⓘTags: Explicitly Excluded (from IOI), Math workload_ex | Classic Problem in China (Probably) (errorgorn) | Batch | 4 |
| rarsum | N/A | ⓘTags: Dynamic Programming rarsum | Raffles Cat Helping Contest 2013 | Batch | 4 |
| pressstart | N/A | ⓘTags: Data Structures, Graph Theory Press Start! | HCI-RI 2020 May Contest (bensonlzl) | Batch | 4 |
| synchronization | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Synchronization | JOI Open Contest 2013 | Batch | 4 |
| valley | N/A | ⓘTags: Divide and Conquer, Graph Theory, Trees Alpine valley | BOI 2019 Day 1 | Batch | 4 |
| lppfnlcst2 | N/A | ⓘTags: Data Structures Lazy Propogation Persistant Fat Nodes Li Chao Segment Tree 2 | Classic Problem (errorgorn) | Batch | 4 |
| voting | N/A | ⓘTags: Data Structures, Greedy Voting | Dunjudge Archive | Batch | 4 |
| streets | N/A | ⓘTags: Data Structures, Graph Theory, Implementation Cancer, Trees One-Way Streets | CEOI 2017 | Batch | 4 |
| squarerect | N/A | ⓘTags: Adhoc, Information Theory Square or Rectangle? | NOI 2019 Prelims | Interactive | 4 |
| usefft1 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 1 | Classic Problem | Batch | 4 |
| trivialmaths2 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math trivialmaths2 (EE) | Educational Round 7 (errorgorn) | Batch | 4 |
| destroy | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Destroy | RI-HCI NOI Selection Test 2019 | Batch | 4 |
| productcounting | N/A | ⓘTags: Divide and Conquer, Square Root Decomposition Product Counting | Educational Round 5 (errorgorn) | Batch | 4 |
| orchard2 | N/A | ⓘTags: Dynamic Programming orchard2 | RI NOI Selection Test 2015 | Batch | 4 |
| rainbowroad | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory, Trees Rainbow Road | HCI-RI 2020 May Contest (bensonlzl) | Batch | 4 |
| fibotree | N/A | ⓘTags: Data Structures, Explicitly Excluded (from IOI), Math fibotree | Bubble Cup 14 (modified) | Batch | 4 |
| efficientdelivery | N/A | ⓘTags: Adhoc, Brute Force efficientdelivery | UWCOI 2021 | Batch | 4 |
| yabbitmeetup | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees yabbitmeetup | HCI NOI Selection Retest 2020 (bensonlzl) | Batch | 4 |
| corporate | N/A | ⓘTags: Data Structures, Divide and Conquer Corporate | IOI 2020 Practice Session | Batch | 4 |
| quality | N/A | ⓘTags: Binary Search, Dynamic Programming Quality of Living | IOI 2010 | Interactive | 4 |
| domine | N/A | ⓘTags: Bitmask, Dynamic Programming domine | COCI 2013/2014 | Batch | 4 |
| funnynim | N/A | ⓘTags: Explicitly Excluded (from IOI), Math funnynim | IMO Shortlist 2015 | Batch | 4 |
| relutree | N/A | ⓘTags: Data Structures relutree | Classic Problem (errorgorn) | Batch | 4 |
| keys | N/A | ⓘTags: Graph Theory, Trees Keys | IOI 2021 | Interactive | 4 |
| globalwarming_ex | N/A | ⓘTags: Data Structures, Graph Theory globalwarming_ex | Dunjudge Archive | Batch | 4 |
| clockpalindrome | N/A | ⓘTags: Adhoc, Dynamic Programming clockpalindrome | December Course 2019 Advanced Final Contest | Batch | 4 |
| chemistry | N/A | ⓘTags: Dynamic Programming, Joke chemistry | April Fools Contest 2020 | Batch | 3 |
| boxhaskey | N/A | ⓘTags: Graph Theory Box Has Key | HCI-RI 2020 May Contest (bensonlzl) | Batch | 3 |
| count1graphs | N/A | ⓘTags: Math Count 1 Graphs | Educational Round 4 (maomao90, errorgorn) | Batch | 3 |
| youngmaids | N/A | ⓘTags: Data Structures youngmaids | Dunjudge Archive | Batch | 3 |
| couples | N/A | ⓘTags: Dynamic Programming couples | December Course 2018 Advanced Final Contest | Batch | 3 |
| changingcolours | N/A | ⓘTags: Data Structures, Dynamic Programming changingcolours | RI Problem Setter Contest 2019 (rs) | Batch | 3 |
| doodles | N/A | ⓘTags: Graph Theory, Math doodles | December Course 2019 Advanced Final Contest (rs) | Batch | 3 |
| supermarkets | N/A | ⓘTags: Data Structures, Implementation Cancer Supermarkets | IOI 2020 Practice Session | Batch | 3 |
| marathon_usaco | N/A | ⓘTags: Data Structures Marathon | USACO 2014 Dec, Gold | Batch | 3 |
| bridge_cerc | N/A | ⓘTags: Graph Theory, Square Root Decomposition Bridge | CERC 2018 | Batch | 3 |
| multiple | N/A | ⓘTags: Graph Theory, Math multiple | Dunjudge Archive | Batch | 3 |
| seats | N/A | ⓘTags: Data Structures Seats | IOI 2018 | Interactive | 3 |
| ktupleflip | N/A | ⓘTags: Adhoc, Greedy K-tuple Flip | TROC 24 (errorgorn) | Batch | 3 |
| bore | N/A | ⓘTags: Brute Force Boring | Dunjudge Archive | Batch | 3 |
| plants | N/A | ⓘTags: Binary Search, Data Structures Comparing Plants | IOI 2020 | Interactive | 3 |
| bananadance | N/A | ⓘTags: Math bananadance | Dunjudge Archive | Batch | 3 |
| switches | N/A | ⓘTags: Explicitly Excluded (from IOI), Math switches | Educational Round 7 (myrcella, errorgorn) | Batch | 3 |
| fabric | N/A | ⓘTags: Data Structures, Dynamic Programming fabric | NOI 2016 | Batch | 3 |
| linearbasis | N/A | ⓘTags: Explicitly Excluded (from IOI), Math linearbasis | Hello 2022 (errorgorn) | Batch | 3 |
| cardgame | N/A | ⓘTags: Data Structures, Dynamic Programming cardgame | Dunjudge Archive | Batch | 3 |
| switches998244353 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math switches998244353 (EE) | Educational Round 7 (errorgorn) | Batch | 3 |
| addsubtract | N/A | ⓘTags: Dynamic Programming, Greedy addsubtract | Dunjudge Archive | Batch | 3 |
| 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 | 3 |
| pawns | N/A | ⓘTags: Adhoc, Explicitly Excluded (from IOI), Math e4e5 Ke2? | TROC 24 (maomao90, errorgorn) | Batch | 3 |
| convention | N/A | ⓘTags: Binary Search, Greedy convention | USACO 2018 December Silver | Batch | 3 |
| orlando | N/A | ⓘTags: Bitmask, Data Structures, Dynamic Programming, Explicitly Excluded (from IOI), Graph Theory, Implementation Cancer, Trees orlando | RI Problem Setter Contest 2019 (zhuan, 0rang3) | Batch | 3 |
| knapsack2 | N/A | ⓘTags: Dynamic Programming knapsack2 | David Pisinger (1995) | Batch | 3 |
| hyperoperations | N/A | ⓘTags: Math hyperoperations | Dunjudge Archive | Batch | 3 |
| robot2 | N/A | ⓘTags: Adhoc, Binary Search, Line Sweep/Sliding Window robot2 | Dunjudge Archive | Batch | 3 |
| sudoku | N/A | ⓘTags: Constructive Algorithms, Greedy sudoku | NOI 2015 | Batch | 3 |
| dateornot | N/A | ⓘTags: Binary Search, Information Theory Date Or Not? | Dunjudge Archive | Interactive | 3 |
| fencing3 | N/A | ⓘTags: Data Structures, Square Root Decomposition fencing3 | Educational Round 3 (errorgorn, tqbfjotld) | Batch | 3 |
| leastround | N/A | ⓘTags: Dynamic Programming leastround | Codeforces 2B | Batch | 3 |
| mirrortree | N/A | ⓘTags: Graph Theory, Trees mirrortree | BOI 2011, Day 2 | Batch | 3 |
| ratar | N/A | ⓘTags: Brute Force, Dynamic Programming ratar | COCI 2013/2014 | Batch | 3 |
| newlottery | N/A | ⓘTags: Dynamic Programming New Lottery | Google Code Jam 2014 | Batch | 3 |
| boomerangs | N/A | ⓘTags: Adhoc Bouncing Boomerangs | Codeforces Raif Round 1 (bensonlzl) | Batch | 3 |
| toy | N/A | ⓘTags: Graph Theory, Trees toy | ROI 2014 | Batch | 3 |
| pandasoldiers | N/A | ⓘTags: Adhoc, Data Structures Soldiers | Dunjudge Archive | Batch | 3 |
| epicinteractive | N/A | ⓘTags: Adhoc, Information Theory, Math Epic Interactive | Educational Round 8 (Goodbye oolimry) (errorgorn, oolimry) | Interactive | 3 |
| gravity | N/A | ⓘTags: Graph Theory gravity | USACO 2013 US Open, SIlver | Batch | 3 |
| deda | N/A | ⓘTags: Binary Search, Data Structures deda | COCI 2017/2018 | Batch | 3 |
| mushroomfarm | N/A | ⓘTags: Binary Search, Dynamic Programming Jianzhi’s Mushroom Farm | RI NOI Selection Test 2017 | Batch | 3 |
| walk | N/A | ⓘTags: Graph Theory Sky Walking | IOI 2019 | Interactive | 3 |
| stations | N/A | ⓘTags: Graph Theory, Information Theory, Trees Stations | IOI 2020 (Day 2) | Communication | 3 |
| manhattancompass | N/A | ⓘTags: Binary Search, Graph Theory manhattancompass | AtCoder | Batch | 3 |
| hipercijevi | N/A | ⓘTags: Graph Theory hipercijevi | COCI 2012/2013 | Batch | 3 |
| closedpath | N/A | ⓘTags: Graph Theory, Trees closedpath | Dunjudge Archive | Batch | 3 |
| foolpruf | N/A | ⓘTags: Data Structures, Graph Theory, Greedy Foolprüf Security | NERC 2019 | Batch | 3 |
| timeleap | N/A | ⓘTags: Data Structures timeleap | JOI | Batch | 3 |
| marathon | N/A | ⓘTags: Dynamic Programming, Graph Theory marathon | RI Problem Setter Contest 2019 (Ziwyy) | Batch | 3 |
| jedan | N/A | ⓘTags: Dynamic Programming jedan | COCI 2012/2013 | Batch | 3 |
| centroid | N/A | ⓘTags: Brute Force, Graph Theory Centroid | Dunjudge Archive | Batch | 3 |
| gizmoguy | N/A | ⓘTags: Slope Trick Gizmo Guy | IOI 2020 Practice Session | Batch | 3 |
| trekking | N/A | ⓘTags: Bitmask, Dynamic Programming, Graph Theory Jungle Trekking | HCI NOI Selection Test 2017 | Batch | 3 |
| meetings | N/A | ⓘTags: Data Structures, Divide and Conquer Meetings | IOI 2018 | Interactive | 3 |
| escalation | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees escalation | RI-HCI December Course Selection 2019 (bensonlzl) | Batch | 3 |
| graphoverflow | N/A | ⓘTags: Graph Theory, Math graphoverflow | RI Deccourse 2018 Selection Test (jerryhanjt) | Batch | 3 |
| graph | N/A | ⓘTags: Graph Theory, Greedy, Trees graph | Dunjudge Archive | Batch | 3 |
| dahliahostels | N/A | ⓘTags: Dynamic Programming, Math dahliahostels | Valentines Contest 2021 (errorgorn) | Batch | 3 |
| citymapping | N/A | ⓘTags: Information Theory, Trees CityMapping | NOI 2018 | Interactive | 3 |
| bracketcount | N/A | ⓘTags: Dynamic Programming, Explicitly Excluded (from IOI), Implementation Cancer bracketcount | Valentines Contest 2021 (errorgorn) | Batch | 3 |
| alice | N/A | ⓘTags: Graph Theory, Information Theory Alice | IMO Shortlist 2019 | Interactive | 3 |
| friend | N/A | ⓘTags: Adhoc friend | IOI 2014 | Interactive | 3 |
| mergecards | N/A | ⓘTags: Adhoc, Dynamic Programming Merge Cards | Google Kick Start 2020 Round G | Batch | 3 |
| highway | N/A | ⓘTags: Binary Search, Information Theory Highway Tolls | IOI 2018 | Interactive | 3 |
| rabbitradar | N/A | ⓘTags: Data Structures, Dynamic Programming rabbitradar | Dunjudge Archive (bensonlzl) | Batch | 2 |
| rect | N/A | ⓘTags: Brute Force, Data Structures Rectangle | IOI 2019 (Day 1) | Interactive | 2 |
| filibuster | N/A | ⓘTags: Data Structures Filibuster | IOI 2020 Practice Session | Batch | 2 |
| killanton | N/A | ⓘTags: Brute Force, Greedy Kill Anton | Codeforces Round 723 (errorgorn) | Batch | 2 |
| mushrooms | N/A | ⓘTags: Constructive Algorithms, Information Theory Counting Mushrooms | IOI 2020 (Day 2) | Interactive | 2 |
| cross | N/A | ⓘTags: Dynamic Programming Cross | Dunjudge Archive | Batch | 2 |
| 4cuts | N/A | ⓘTags: Adhoc, Brute Force 4cuts | Dunjudge Archive | Batch | 2 |
| powersupply | N/A | ⓘTags: Adhoc, Data Structures, Line Sweep/Sliding Window, Math Power Supply | Educational Round 5 (cstuart) | Batch | 2 |
| neila | N/A | ⓘTags: Adhoc, Math neila | RMM 2013/5 | Batch | 2 |
| trianglesum | N/A | ⓘTags: Brute Force, Dynamic Programming trianglesum | NOI 2010 Selection Test | Batch | 2 |
| wombats | N/A | ⓘTags: Data Structures wombats | IOI 2013 | Interactive | 2 |
| enumeratingbrackets | N/A | ⓘTags: Dynamic Programming Enumerating Brackets | Waterloo Programming Contest 2016-10-01 | Batch | 2 |
| streetlamps_ex | N/A | ⓘTags: Data Structures, Divide and Conquer, Implementation Cancer Street Lamps!! | APIO 2019 but with more pain | Batch | 2 |
| dinnerbox | N/A | ⓘTags: Dynamic Programming, Greedy Jianzhi’s Dinner Box | RI NOI Selection Test 2017 | Batch | 2 |
| grazing | N/A | ⓘTags: Bitmask, Brute Force, Graph Theory grazing | USACO Bronze Jan 2012 | Batch | 2 |
| election_joi | N/A | ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Election Campaign | JOI Open 2015 | Batch | 2 |
| synergies | N/A | ⓘTags: Constructive Algorithms, Graph Theory Synergies | IOI 2020 Practice Session | Batch | 2 |
| usefft4 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 4 | Valentine's Day Contest 2022 (errorgorn) | Batch | 2 |
| cowland | N/A | ⓘTags: Data Structures, Explicitly Excluded (from IOI), Graph Theory, Trees Cow Land | USACO 2019 February Contest, Gold | Batch | 2 |
| styles | N/A | ⓘTags: Binary Search, Data Structures, Dynamic Programming Styles | IOI 2020 Practice Session | Batch | 2 |
| taxes | N/A | ⓘTags: Data Structures, Dynamic Programming, Square Root Decomposition taxes | December Course 2018 Advanced Final Contest | Batch | 2 |
| diesel | N/A | ⓘTags: Dynamic Programming, Graph Theory diesel | NOI 2013 | Batch | 2 |
| ballsofbuma | N/A | ⓘTags: Adhoc Balls of Buma | Dunjudge Archive | Batch | 2 |
| ninjashard | N/A | ⓘTags: Data Structures Ninjas (Hard) | TROC 24 (oolimry, errorgorn) | Batch | 2 |
| stagegames_part1 | N/A | ⓘTags: Adhoc, Information Theory Estelle’s Stage Games (Subtasks 1 - 5) | RI-HCI NOI Selection Test 2018 | Interactive | 2 |
| boxoffice | N/A | ⓘTags: Brute Force, Data Structures, Implementation Cancer Box Office | Dunjudge Archive | Batch | 2 |
| sumo | N/A | ⓘTags: Binary Search, Graph Theory sumo | COCI 2013/2014 | Batch | 2 |
| banks | N/A | ⓘTags: Graph Theory Banks | IOI 2020 Practice Session | Batch | 2 |
| notebook | N/A | ⓘTags: Graph Theory notebook | Dunjudge Archive | Batch | 2 |
| presents | N/A | ⓘTags: Explicitly Excluded (from IOI), Math presents (EE) | Valentines Contest 2021 (maomao90) | Batch | 2 |
| UCFJ | N/A | ⓘTags: Data Structures UCFJ | USACO 2021 US Open, Platinum | Batch | 2 |
| killanton_ex | N/A | ⓘTags: Bitmask, Dynamic Programming killanton_ex | Valentine's Day Contest 2022 (errorgorn) | Batch | 2 |
| math | N/A | ⓘTags: Brute Force, Math Primes Up | April Fools Contest 2020 | Batch | 2 |
| figures | N/A | ⓘTags: Binary Search, Dynamic Programming Figures | IOI 2020 Practice Session | Batch | 2 |
| rabbitgifts | N/A | ⓘTags: Data Structures, Math rabbitgifts | December Course 2018 Advanced Final Contest | Batch | 2 |
| mincross_usaco | N/A | ⓘTags: Data Structures mincross_usaco | USACO 2017 Feb, Platinum | Batch | 2 |
| cardgame2 | N/A | ⓘTags: Dynamic Programming cardgame2 | Dunjudge Archive | Batch | 2 |
| colour | N/A | ⓘTags: Data Structures colour | Dunjudge Archive | Batch | 2 |
| shoes | N/A | ⓘTags: Data Structures, Greedy Arranging Shoes | IOI 2019 (Day 1) | Interactive | 2 |
| papplesort | N/A | ⓘTags: Data Structures papplesort | Dunjudge Archive | Batch | 2 |
| split | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Trees Split the Attractions | IOI 2019 (Day 1) | Interactive | 2 |
| snakecode | N/A | ⓘTags: Dynamic Programming snakecode | Dunjudge Archive | Interactive | 2 |
| ruler | N/A | ⓘTags: Brute Force, Data Structures, Implementation Cancer Ruler Of The Zoo | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch | 2 |
| trackingtraining | N/A | ⓘTags: Graph Theory, Math Tracking Training | IOI 2020 Practice Session | Batch | 2 |
| sequence | N/A | ⓘTags: Adhoc, Greedy sequence | AtCoder | Batch | 2 |
| seabreakpath | N/A | ⓘTags: Data Structures Seabreak Path | SGP Sparring 2021 (lovemathboy) | Batch | 2 |
| girlfriends | N/A | ⓘTags: Explicitly Excluded (from IOI), Math girlfriends (EE) | CP Singles Day Contest 2020 (errorgorn) | Batch | 2 |
| rainbow | N/A | ⓘTags: Data Structures, Graph Theory, Math Land of the Rainbow Gold | APIO 2017 | Interactive | 2 |
| secret_mco | N/A | ⓘTags: Adhoc Secret | MCO 2015 | Batch | 2 |
| infinitezoo | N/A | ⓘTags: Bitmask, Graph Theory, Greedy, Math Zookeeper and The Infinite Zoo | Codeforces Global Round 13 (errorgorn) | Batch | 2 |
| bananaland | N/A | ⓘTags: Dynamic Programming bananaland | NUSH ISC 2018 | Batch | 2 |
| cakeatstake | N/A | ⓘTags: Data Structures, Implementation Cancer Cake at Stake | IOI 2020 Practice Session | Batch | 2 |
| triumvirate | N/A | ⓘTags: Dynamic Programming Triumvirate | IOI 2020 Practice Session | Batch | 2 |
| ispit | N/A | ⓘTags: Adhoc ispit | COCI 2018/2019 | Batch | 2 |
| devil | N/A | ⓘTags: Constructive Algorithms, Graph Theory The Devil's Algorithm | Hello 2022 (errorgorn) | Batch | 2 |
| weddingcity | N/A | ⓘTags: Constructive Algorithms, Graph Theory weddingcity | IOI Sparring 2018 SGP | Batch | 2 |
| fiboregisters | N/A | ⓘTags: Adhoc, Constructive Algorithms, Math IOI Registers: but epic | TROC 24 (errorgorn) | Batch | 2 |
| boarding | N/A | ⓘTags: Graph Theory boarding | NUSH ISC 2018 | Batch | 2 |
| notimetodry | N/A | ⓘTags: Data Structures, Square Root Decomposition No Time to Dry | USACO 2021 February Contest, Platinum | Batch | 2 |
| repairs | N/A | ⓘTags: Data Structures, Explicitly Excluded (from IOI), Graph Theory, Trees repairs | Dunjudge Archive | Batch | 2 |
| ninjaseasy | N/A | ⓘTags: Data Structures Ninjas (Easy) | TROC 24 (oolimry) | Batch | 2 |
| forensic | N/A | ⓘTags: Brute Force, Graph Theory forensic | NOI 2012 | Batch | 2 |
| wearenumberone | N/A | ⓘTags: Graph Theory We Are Number One | IOI 2020 Practice Session | Batch | 2 |
| escapesadland | N/A | ⓘTags: Binary Search, Graph Theory Escape Sadland | Dunjudge Archive | Batch | 2 |
| stagegames_part2 | N/A | ⓘTags: Adhoc, Information Theory Estelle’s Stage Games (Subtasks 6 - 10) | RI-HCI NOI Selection Test 2018 | Interactive | 2 |
| cantor | N/A | ⓘTags: Binary Search, Information Theory cantor | TROC 24 (errorgorn) | Interactive | 2 |
| clipboard | N/A | ⓘTags: Adhoc, Data Structures Jianzhi’s Clipboard Sorting | RI NOI Selection Test 2017 | Batch | 2 |
| lottery | N/A | ⓘTags: Adhoc Lottery | CEOI 2018 | Batch | 2 |
| vision | N/A | ⓘTags: Adhoc, Constructive Algorithms, Information Theory Vision Program | IOI 2019 | Interactive | 2 |
| construction | N/A | ⓘTags: Graph Theory, Trees Construction of Highway | JOI 2017/2018 Spring Camp | Batch | 2 |
| mrbeancurd | N/A | ⓘTags: Dynamic Programming mrbeancurd | HCI Be A Problem Setter (BAPS) Contest 2017 | Batch | 2 |
| subwaytrip | N/A | ⓘTags: Graph Theory subwaytrip | Dunjudge Archive | Batch | 2 |
| nutritionist | N/A | ⓘTags: Data Structures nutritionist | Dunjudge Archive | Batch | 2 |
| shuffle | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Implementation Cancer shuffle | NOI 2019 | Interactive | 2 |
| goneviral | N/A | ⓘTags: Binary Search, Graph Theory Gone Viral | IOI 2020 Practice Session | Batch | 2 |
| cantor_ex | N/A | ⓘTags: Binary Search, Information Theory cantor_ex | Valentine's Day Contest 2022 (errorgorn) | Interactive | 2 |
| parks | N/A | ⓘTags: Adhoc, Constructive Algorithms, Graph Theory Fountain Parks | IOI 2021 | Interactive | 2 |
| camels | N/A | ⓘTags: Data Structures Guessing Camels | NWERC 2015 | Batch | 2 |
| morepaths | N/A | ⓘTags: Dynamic Programming morepaths | Dunjudge Archive | Batch | 2 |
| ples | N/A | ⓘTags: Greedy ples | COCI 2011/2012 | Batch | 2 |
| powerpoints | N/A | ⓘTags: Constructive Algorithms, Implementation Cancer Power Points | IOI 2020 Practice Session | Batch | 2 |
| firing | N/A | ⓘTags: Data Structures, Implementation Cancer Firing | IOI 2020 Practice Session | Batch | 2 |
| dungeons | N/A | ⓘTags: Graph Theory Dungeons Game | IOI 2021 | Interactive | 1 |
| kronican | N/A | ⓘTags: Bitmask, Dynamic Programming kronican | COCI 2016/2017 | Batch | 1 |
| rarkids | N/A | ⓘTags: Constructive Algorithms, Math rarkids | IOI Sparring 2018 SGP | Interactive | 1 |
| hexagon | N/A | ⓘTags: Graph Theory, Implementation Cancer, Math Hexagonal Territory | APIO 2021 | Interactive | 1 |
| harvest | N/A | ⓘTags: Data Structures, Implementation Cancer Harvest | JOI 2019/2020 | Batch | 1 |
| registers | N/A | ⓘTags: Bitmask, Constructive Algorithms Bit Shift Registers | IOI 2021 | Interactive | 1 |
| builderswand | N/A | ⓘTags: Dynamic Programming Builder’s Wand | HCI NOI Selection Test 2017 | Batch | 1 |
| trianglecraft | N/A | ⓘTags: Math Trianglecraft | HCI NOI Selection Test 2017 | Batch | 1 |
| superfanclub | N/A | ⓘTags: Graph Theory, Trees Estelle’s Super Fan Club | RI-HCI NOI Selection Test 2018 | Interactive | 1 |
| hanabi | N/A | ⓘTags: Binary Search, Data Structures hanabi | IOI Sparring 2018 SGP | Batch | 1 |
| penghulu | N/A | ⓘTags: Dynamic Programming, Graph Theory, Trees Penghulu | MCO 2016 | Batch | 1 |
| lost | N/A | ⓘTags: Bitmask, Information Theory Jianzhi’s Lost | RI NOI Selection Test 2017 | Interactive | 1 |
| usefft2 | N/A | ⓘTags: Math Use FFT 2 | Valentine's Day Contest 2022 (errorgorn) | Batch | 1 |
| countedges | N/A | ⓘTags: Dynamic Programming, Graph Theory, Math Counting Edges | USACO 2021 February Contest, Platinum | Batch | 1 |
| chefmala | N/A | ⓘTags: Data Structures chefmala | CodeChef February Lunchtime 2022 (errorgorn) | Batch | 1 |
| mooshroomfarm | N/A | ⓘTags: Data Structures, Implementation Cancer Mooshroom Farm | HCI NOI Selection Test 2017 | Batch | 1 |
| redstonelamps | N/A | ⓘTags: Explicitly Excluded (from IOI), Implementation Cancer, Math Redstone Lamps | HCI NOI Selection Test 2017 | Batch | 1 |
| mathtest | N/A | ⓘTags: Implementation Cancer, Math, Syntax mathtest | Dunjudge Archive | Batch | 1 |
| shortest | N/A | ⓘTags: Explicitly Excluded (from IOI), Math shortest | Dunjudge Archive | Batch | 1 |
| consistency | N/A | ⓘTags: Data Structures, Implementation Cancer Consistency | RI-HCI NOI Selection Test 2019 (bensonlzl) | Batch | 1 |
| virus | N/A | ⓘTags: Adhoc, Graph Theory, Line Sweep/Sliding Window virus | JOISC 2017, Day 1 | Batch | 1 |
| forkintheroad | N/A | ⓘTags: Dynamic Programming, Graph Theory, Math forkintheroad | AtCoder | Batch | 1 |
| kronecker | N/A | ⓘTags: Math kronecker | Valentine's Day Contest 2022 (errorgorn) | Batch | 1 |
| alien10 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math alien10 | uwu (errorgorn) | Batch | 1 |
| paleta | N/A | ⓘTags: Dynamic Programming, Graph Theory, Math paleta | COCI 2013/2014 | Batch | 1 |
| spiraldance | N/A | ⓘTags: Adhoc, Math Estelle’s Spiral Dance | RI-HCI NOI Selection Test 2018 | Batch | 1 |
| pond | N/A | ⓘTags: Data Structures, Dynamic Programming, Implementation Cancer pond | NOI 2021 Finals | Batch | 1 |
| switchandflip | N/A | ⓘTags: Constructive Algorithms, Graph Theory, Math Switch and Flip | Codeforces Global Round 13 (errorgorn, oolimry) | Batch | 1 |
| cattown | N/A | ⓘTags: Graph Theory Cat Town | RI/RJC NOI Selection Test 2016 | Batch | 1 |
| tomskitchen | N/A | ⓘTags: Dynamic Programming Tom’s Kitchen | BOI 2019 Day 2 | Batch | 1 |
| rookable | N/A | ⓘTags: Graph Theory Rookable | NUSH NOI Selection Test 2018 | Batch | 1 |
| friendcross | N/A | ⓘTags: Data Structures friendcross | USACO 2017 Feb Plat | Batch | 1 |
| cellulardata | N/A | ⓘTags: Bitmask, Dynamic Programming, Explicitly Excluded (from IOI), Implementation Cancer, Math Cellular Data | IOI 2020 Practice Session | Batch | 1 |
| springtrap | N/A | ⓘTags: Data Structures springtrap | Educational Round 1 (bensonlzl) | Batch | 1 |
| infiniteseq | N/A | ⓘTags: Dynamic Programming infiniteseq | AtCoder Regular Contest 071 | Batch | 1 |
| reflection | N/A | ⓘTags: Constructive Algorithms, Implementation Cancer, Math reflection | RI-HCI NOI Selection Test 2020 (eutroph) | Batch | 1 |
| gathering | N/A | ⓘTags: Graph Theory, Greedy gathering | USACO 2018 December Platinum | Batch | 1 |
| network2 | N/A | ⓘTags: Data Structures, Explicitly Excluded (from IOI), Graph Theory, Trees network | Dunjudge Archive | Batch | 1 |
| minedges | N/A | ⓘTags: Graph Theory Minimizing Edges | USACO 2021 February Contest, Platinum | Batch | 1 |
| alphabrackets | N/A | ⓘTags: Data Structures, Dynamic Programming alphabrackets | Dec Course Final Contest 2017 | Batch | 1 |
| trespasser | N/A | ⓘTags: Bitmask, Implementation Cancer, Information Theory ADVANCED Trespasser | 2019 IOI Problem Setter Contest (bensonlzl) | Interactive | 1 |
| fruits_noi | N/A | ⓘTags: Data Structures, Dynamic Programming Fruits | NOI 2022 Finals (bensonlzl) | Batch | 1 |
| wakeup | N/A | ⓘTags: Binary Search, Data Structures Wake Up | IOI 2020 Practice Session | Batch | 1 |
| usefft3 | N/A | ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 3 | Valentine's Day Contest 2022 (errorgorn) | Batch | 1 |
| idigit | N/A | ⓘTags: Bitmask, Math I Dig It! | IOI 2020 Practice Session | Batch | 1 |
| mountain | N/A | ⓘTags: Data Structures Mountain | IOI 2005 | Batch | 1 |
| binaryseq | N/A | ⓘTags: Math BinarySeq | Dunjudge Archive (bensonlzl) | Batch | 1 |
| spotlights | N/A | ⓘTags: Adhoc Estelle’s Concert Spotlights | RI-HCI NOI Selection Test 2018 | Batch | 1 |
| crab | N/A | ⓘTags: Bitmask, Dynamic Programming, Implementation Cancer Crab | NUSH NOI Selection Test 2018 | Batch | 1 |
| maxmex | N/A | ⓘTags: Data Structures, Graph Theory, Trees Max Mex | Dunjudge Archive | Batch | 1 |
| wheelofmisfortune | N/A | ⓘTags: Implementation Cancer Wheel of Misfortune | IOI 2020 Practice Session | Batch | 1 |
| visiting | N/A | ⓘTags: Graph Theory, Trees visiting | Dunjudge Archive | Batch | 1 |
| obelisk | N/A | ⓘTags: Graph Theory obelisk | NOI 2014 | Batch | 1 |
| minimax | N/A | ⓘTags: Graph Theory, Trees minimax | Hello 2020 (errorgorn) | Batch | 1 |
| inversionsum | N/A | ⓘTags: Dynamic Programming, Math inversionsum | Dunjudge Archive | Batch | 1 |
| cats | N/A | ⓘTags: Adhoc cats | NOI 2014 | Batch | 1 |