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


gerrymandering_ex  N/A  ⓘTags: Greedy Gerrymandering (Extreme)  Dec Course 2021 BAPS (modified) (beepbeepsheep)  Batch  1 
toxic  N/A  ⓘTags: Binary Search, Information Theory Toxic Gene  NOI 2023 Finals (bensonlzl)  Interactive  3 
topical  N/A  ⓘTags: Adhoc Topical  NOI 2023 Finals (bensonlzl)  Batch  28 
inspections  N/A  ⓘTags: Data Structures Inspections  NOI 2023 Finals (bensonlzl)  Batch  15 
airplane  N/A  ⓘTags: Graph Theory, Greedy Airplane  NOI 2023 Finals (bensonlzl, oolimry)  Batch  13 
curtains  N/A  ⓘTags: Data Structures, Divide and Conquer Curtains  NOI 2023 Finals (bensonlzl)  Batch  10 
pplow  N/A  ⓘTags: Line Sweep/Sliding Window pplow  Classic Problem  Batch  6 
simplebridges  N/A  ⓘTags: Math, Syntax simplebridges  ANDSS February 2023 Contest (shoryu386)  Batch  39 
network  N/A  ⓘTags: Graph Theory, Greedy, Trees network  NOI 2023 Qualification Contest (errorgorn)  Batch  25 
doll_noi  N/A  ⓘTags: Data Structures, Greedy doll_noi  NOI 2023 Qualification Contest (yanhao, oolimry)  Batch  40 
burgers  N/A  ⓘTags: Binary Search, Data Structures, Math burgers  NOI 2023 Qualification Contest (oolimry, bensonlzl, yanhao)  Batch  36 
swords  N/A  ⓘTags: Syntax swords  NOI 2023 Qualification Contest (yanhao)  Batch  72 
area_noi  N/A  ⓘTags: Syntax area_noi  NOI 2023 Qualification Contest (yanhao)  Batch  109 
railroad  N/A  ⓘTags: Graph Theory, Greedy Roller Coaster Railroad  IOI 2016  Interactive  2 
simurgh  N/A  ⓘTags: Graph Theory, Information Theory, Trees Simurgh  IOI 2017  Interactive  1 
iqtest4  N/A  ⓘTags: Math iqtest4  Valentine's Day Contest 2023 (zixuan)  Batch  7 
xorsplit  N/A  ⓘTags: Bitmask, Divide and Conquer, Explicitly Excluded (from IOI) xorsplit  Valentine's Day Contest 2023 (blackscreen1, pavement, maomao90, zaneyu)  Batch  2 
motest  N/A  ⓘTags: Math MOtest  Valentine's Day Contest 2023 (Tyx2019)  Batch  15 
messages  N/A  ⓘTags: Information Theory Messages  Valentine's Day Contest 2023 (beepbeepsheep)  Communication  5 
squidgame  N/A  ⓘTags: Data Structures Squid Game 2: Hot Chocolate  Valentine's Day Contest 2023 (Wenkai, beepbeepsheep)  Batch  3 
fractional_knapsack  N/A  ⓘTags: Greedy fractional_knapsack  Classic Problem  Batch  11 
magiccarps  N/A  ⓘTags: Brute Force, Syntax magiccarps  ANDSS Contest 2 (Greedy and Bruteforce) (shoryu386)  Batch  22 
binaryspells  N/A  ⓘTags: Greedy, Math binaryspells  ANDSS Contest 2 (Greedy and Bruteforce) (shoryu386)  Batch  13 
cny  N/A  ⓘTags: Greedy cny  ANDSS Contest 2 (Greedy and Bruteforce) (LCJLY)  Batch  38 
sandcity  N/A  ⓘTags: Dynamic Programming sandcity  Random Idea (shoryu386, Reverberate)  Batch  13 
experimentexplodeexpel  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Experiment. Explode. Expel.  Dunjudge Archive  Batch  3 
lightsflip  N/A  ⓘTags: Adhoc, Dynamic Programming lightsflip  Dunjudge Archive  Batch  9 
happyarrays  N/A  ⓘTags: Dynamic Programming, Line Sweep/Sliding Window Happy Arrays  Classic Problem (penguin133)  Batch  17 
hieroglyphs  N/A  ⓘTags: Graph Theory, Math hieroglyphs  ACM/ICPC World Finals 2011  Batch  1 
celldivision  N/A  ⓘTags: Binary Search, Math celldivision  Random Idea (shoryu386)  Batch  23 
numberfun  N/A  ⓘTags: Dynamic Programming numberfun  Dunjudge Archive  Batch  29 
lightsout  N/A  ⓘTags: Constructive Algorithms, Dynamic Programming, Graph Theory, Trees Light's Out  Dunjudge Archive  Interactive  1 
rbpoints  N/A  ⓘTags: Data Structures, Greedy rbpoints  ABC 091C  Batch  5 
removemq  N/A  ⓘTags: Brute Force, Data Structures, Greedy removemq  ARC 098E  Batch  4 
fliprect  N/A  ⓘTags: Adhoc, Data Structures, Dynamic Programming fliprect  ARC 081F  Batch  1 
candies2  N/A  ⓘTags: Greedy candies2  ARC 064A  Batch  17 
cipele  N/A  ⓘTags: Binary Search, Greedy cipele  COCI 2018/2019  Batch  2 
merchant2  N/A  ⓘTags: Greedy merchant2  ABC 047D  Batch  4 
colouring  N/A  ⓘTags: Graph Theory colouring  AGC 012B  Batch  5 
zamjena  N/A  ⓘTags: Graph Theory zamjena  COCI 2018/2019  Batch  2 
dogmonkey  N/A  ⓘTags: Math dogmonkey  ABC 065C  Batch  29 
goodgame  N/A  ⓘTags: Explicitly Excluded (from IOI), Math goodgame  ARC 072D  Batch  16 
split2  N/A  ⓘTags: Graph Theory, Greedy, Trees Split  December Course 2018 Elementary Final Contest  Batch  7 
personalspace  N/A  ⓘTags: Binary Search, Dynamic Programming, Line Sweep/Sliding Window personalspace  December Course 2018 Elementary Final Contest  Batch  7 
nou  N/A  ⓘTags: Adhoc no "u"  December Course 2018 Elementary Final Contest (bensonlzl)  Batch  27 
socks  N/A  ⓘTags: Adhoc, Syntax socks  December Course 2018 Elementary Final Contest (Damian)  Batch  29 
souvenirs2  N/A  ⓘTags: Data Structures, Math souvenirs2  ARC 068C  Batch  5 
competitiveteams  N/A  ⓘTags: Graph Theory, Square Root Decomposition Competitive Teams  HackerRank  Batch  2 
avoidcollision  N/A  ⓘTags: Dynamic Programming, Graph Theory avoidcollision  ARC 090C  Batch  1 
build  N/A  ⓘTags: Graph Theory, Greedy build  ABC 065D  Batch  14 
nuskevsphantom  N/A  ⓘTags: Graph Theory, Trees Nuske vs Phantom Thnook  AGC 015C  Batch  1 
treeinteger  N/A  ⓘTags: Graph Theory, Greedy, Trees treeinteger  ARC 063E  Batch  1 
shorten  N/A  ⓘTags: Brute Force, Graph Theory, Trees shorten  AGC 001C  Batch  1 
squaregraph  N/A  ⓘTags: Graph Theory Square Graph  AGC 011C  Batch  1 
masquerade  N/A  ⓘTags: Graph Theory, Math masquerade  BZOJ 1064  Batch  1 
restoreroad  N/A  ⓘTags: Graph Theory Restore Road  ABC 074D  Batch  2 
kfc  N/A  ⓘTags: Math, Syntax kfc  ANDSS Contest 1 (Syntax) (haydendoo)  Batch  40 
passwords  N/A  ⓘTags: Graph Theory passwords  Dunjudge Archive  Batch  9 
harmony  N/A  ⓘTags: Graph Theory harmony  Dunjudge Archive  Batch  2 
homeworkextension  N/A  ⓘTags: Syntax homeworkextension  ANDSS Contest 1 (Syntax) (Josh28)  Batch  39 
rabbitmilk  N/A  ⓘTags: Greedy rabbitmilk  Dunjudge Archive  Batch  16 
judgequeue  N/A  ⓘTags: Data Structures judgequeue  Dunjudge Archive  Interactive  2 
ultimateifelse  N/A  ⓘTags: Syntax Ultimate ifelse  ANDSS Contest 1 (Syntax) (LCJLY)  Batch  63 
duckwander  N/A  ⓘTags: Syntax duckwander  ANDSS Contest 1 (Syntax) (shoryu386)  Batch  32 
guards_easy  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming, Joke Guards (Easy)  Dunjudge Archive (modified) (beepbeepsheep)  Batch  3 
volcanic  N/A  ⓘTags: Binary Search, Graph Theory Volcanic Travel  ANDSS Welcome 2023 (Day 2) (shoryu386)  Batch  10 
palindromicfever  N/A  ⓘTags: Dynamic Programming, Math Palindromic Fever  ANDSS Welcome 2023 (Day 2) (shoryu386)  Batch  7 
belittle  N/A  ⓘTags: Dynamic Programming belittle  ANDSS Welcome 2023 (Day 2) (shoryu386)  Batch  22 
numbergame  N/A  ⓘTags: Binary Search numbergame  ANDSS Welcome 2023 (Day 2) (shoryu386)  Batch  14 
snowball  N/A  ⓘTags: Greedy, Syntax snowball  ANDSS Welcome 2023 (Day 1) (shoryu386)  Batch  62 
swayingflowers  N/A  ⓘTags: Math, Syntax swayingflowers  ANDSS Welcome 2023 (Day 1) (shoryu386)  Batch  47 
telephone  N/A  ⓘTags: Syntax Telephone Game  ANDSS Welcome 2023 (Day 1) (shoryu386)  Batch  53 
modulochain  N/A  ⓘTags: Math, Syntax modulochain  Anderson Trg (shoryu386)  Batch  34 
perfectprimes  N/A  ⓘTags: Math perfectprimes  Anderson Fluff Contest (Josh28, shoryu386)  Batch  28 
duckwar  N/A  ⓘTags: Binary Search, Greedy, Math duckwar  Anderson Fluff Contest (shoryu386)  Batch  15 
nicenumber  N/A  ⓘTags: Joke nicenumber  Anderson Fluff Contest (haydendoo)  Batch  52 
football  N/A  ⓘTags: Dynamic Programming football  Anderson Fluff Contest (LCJLY)  Batch  16 
veryeasyproblem  N/A  ⓘTags: Joke veryeasyproblem  Anderson Fluff Contest (shoryu386)  Batch  108 
royalguards  N/A  ⓘTags: Data Structures, Dynamic Programming royalguards  AMOS OI 2022 (buffed) (shoryu386)  Batch  10 
guards_ex  N/A  ⓘTags: Adhoc, Greedy, Joke Guards (Extreme)  Zane (zaneyu, ryangohca)  Batch  39 
nostatement  N/A  ⓘTags: Joke, Math nostatement  Dunjudge Archive  Batch  23 
guessproblem  N/A  ⓘTags: Information Theory, Joke Guess Problem  peepeepoopoo (Potato3218, ryangohca)  Batch  28 
reopening  N/A  ⓘTags: Constructive Algorithms, Graph Theory, Trees Reopening Shop  Dec Course 2022 BAPS (errorgorn, Halogen)  Batch  24 
kthpar  N/A  ⓘTags: Explicitly Excluded (from IOI), Graph Theory, Trees JiaHng couldn’t solve this lol  folklore (errorgorn)  Batch  2 
removalcosts  N/A  ⓘTags: Adhoc, Greedy, Math Removal Costs  Dec Course 2022 BAPS (maomao90)  Batch  19 
findinggrass  N/A  ⓘTags: Data Structures, Greedy Finding Grass  Dec Course 2022 BAPS (hmm)  Batch  16 
valves  N/A  ⓘTags: Data Structures Valves  Dec Course 2022 BAPS (beepbeepsheep)  Batch  2 
hungryrabbits3  N/A  ⓘTags: Binary Search, Greedy Hungry Rabbits 3  Dec Course 2022 BAPS (bensonlzl)  Batch  4 
lctocd  N/A  ⓘTags: Brute Force, Data Structures, Divide and Conquer, Graph Theory, Greedy, Trees LCT OCD  Atcoder Nikkei Finals 2019  Batch  6 
gohcart  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory Goh Cart  Codeforces 1715E (f0restf1re)  Batch  17 
newjeans  N/A  ⓘTags: Divide and Conquer, Dynamic Programming Bob's New Jeans  Codeforces 868F  Batch  14 
pipes  N/A  ⓘTags: Graph Theory Pipes  CEOI 2015  Batch  13 
sherlockgraph  N/A  ⓘTags: Graph Theory sherlockgraph  HackerRank  Batch  1 
semiconnected  N/A  ⓘTags: Graph Theory semiconnected  Dunjudge Archive  Batch  3 
police  N/A  ⓘTags: Dynamic Programming, Graph Theory Police Station  CPSPC 2017  Batch  12 
reachability  N/A  ⓘTags: Dynamic Programming, Graph Theory reachability  Classic Problem  Batch  11 
gotoubun  N/A  ⓘTags: Data Structures, Dynamic Programming gotoubun  folklore (errorgorn)  Batch  27 
hld2  N/A  ⓘTags: Data Structures, Graph Theory, Trees hld2  LOJ P3532  Batch  8 
dynamicdiameter2  N/A  ⓘTags: Graph Theory, Trees Dynamic Diameter 2  RMI 2020  Batch  1 
letterstamper_ex  N/A  ⓘTags: Dynamic Programming Letter Stamper (Extreme)  Google Code Jam 2010 (modified) (ryangohca)  Batch  3 
rainbowroad_ex  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Rainbow Road (Extreme)  HCIRI 2020 May Contest (modified) (errorgorn)  Batch  3 
socialdistance  N/A  ⓘTags: Adhoc, Graph Theory, Trees Social Distance  Codeforces 1381D  Batch  4 
rootedlca  N/A  ⓘTags: Graph Theory, Trees Rooted LCA  folklore (errorgorn)  Batch  39 
dynamicdiameter  N/A  ⓘTags: Graph Theory, Trees Dynamic Diameter  CEOI 2019  Batch  4 
jumpontree  N/A  ⓘTags: Graph Theory, Trees jumpontree  yosupo's judge  Batch  43 
candyboxes  N/A  ⓘTags: Data Structures candyboxes  Rujia Liu's Present 3 (Kattis)  Batch  38 
iqtest3  N/A  ⓘTags: Constructive Algorithms, Graph Theory iqtest3  AGC 50A  Batch  52 
hld  N/A  ⓘTags: Data Structures, Graph Theory, Trees hld  LOJ P139  Batch  18 
splittingtree  N/A  ⓘTags: Graph Theory, Trees Splitting Tree  LOJ P3213  Batch  1 
love  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory, Trees What is love?  Luogu P8280  Batch  6 
sumalllis  N/A  ⓘTags: Bitmask, Dynamic Programming, Joke Sum All LIS  Luogu P4484 (modified) (zaneyu)  Batch  5 
feelgood  N/A  ⓘTags: Dynamic Programming, Math Feel Good  Luogu P2602  Batch  21 
closingshop  N/A  ⓘTags: Dynamic Programming, Graph Theory Closing Shop  Codeforces 721C  Batch  25 
redblacktree  N/A  ⓘTags: Adhoc, Graph Theory, Trees redblacktree  Codeforces 1156D  Batch  32 
obstacletree  N/A  ⓘTags: Dynamic Programming, Graph Theory, Greedy, Trees obstacletree  Codeforces 1528A  Batch  33 
treepruning2  N/A  ⓘTags: Graph Theory, Greedy, Trees Pruning Trees  Codeforces 1593E (modified) (ecxx)  Batch  28 
treepruning  N/A  ⓘTags: Brute Force, Graph Theory, Trees Tree Pruning  Codeforces 1593E  Batch  42 
arraypartition  N/A  ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window arraypartition  Codeforces 487B  Batch  22 
bracketcoloring  N/A  ⓘTags: Dynamic Programming bracketcoloring  Codeforces 149D  Batch  5 
segmentoperations  N/A  ⓘTags: Data Structures, Dynamic Programming, Math Segment Operations  Codeforces 1743F  Batch  14 
paintrectangles  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window paintrectangles  Codeforces 983D  Batch  7 
specialmultiset  N/A  ⓘTags: Data Structures specialmultiset  Codeforces 981G  Batch  11 
shuffling  N/A  ⓘTags: Dynamic Programming Shuffling  ARC 065D  Batch  12 
obstacles  N/A  ⓘTags: Binary Search, Dynamic Programming obstacles  Codeforces 360B  Batch  21 
simpletask  N/A  ⓘTags: Data Structures A Simple Task  Codeforces 558E  Batch  28 
purplecandy  N/A  ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window Purple Candy  Classic Problem (shenxy13, ryangohca)  Batch  55 
exhibition  N/A  ⓘTags: Greedy Exhibition  JOI 2018/2019 Final Round  Batch  38 
copyandpaste  N/A  ⓘTags: Greedy Copy And Paste  Codeforces 1688F  Batch  8 
packingpests  N/A  ⓘTags: Data Structures, Dynamic Programming packingpests  Kattis  Batch  6 
flipthat  N/A  ⓘTags: Dynamic Programming, Math Flip That  Codeforces 1630D  Batch  11 
lualectures  N/A  ⓘTags: Constructive Algorithms, Greedy Lua Lectures  Classic Problem  Batch  58 
luarulers  N/A  ⓘTags: Greedy Lua Rulers  Codeforces 1748C  Batch  46 
placingrouters  N/A  ⓘTags: Greedy Placing Routers  Codeforces 1764E  Batch  12 
movingboxes  N/A  ⓘTags: Data Structures, Greedy movingboxes  Codeforces 1030F  Batch  10 
mountainrange  N/A  ⓘTags: Data Structures, Greedy mountainrange  Codeforces 935F  Batch  11 
buygifts  N/A  ⓘTags: Binary Search buygifts  Codeforces 1619D  Batch  49 
addk  N/A  ⓘTags: Data Structures, Math addk  EJOI 2021  Batch  19 
buycoke  N/A  ⓘTags: Dynamic Programming Buying Coke  Kattis  Batch  25 
letterstamper  N/A  ⓘTags: Dynamic Programming Letter Stamper  Google Code Jam 2010 (modified)  Batch  41 
lratio  N/A  ⓘTags: Data Structures, Dynamic Programming L + Ratio  Алгоритм 2022  Batch  22 
weightlifting  N/A  ⓘTags: Dynamic Programming weightlifting  Google Code Jam 2022 Round 1A  Batch  2 
lamps  N/A  ⓘTags: Graph Theory Lamps  CF1290C  Batch  6 
friendlyrooks  N/A  ⓘTags: Brute Force, Greedy Friendly Rooks  2022 December Course Diagnostic Test (errorgorn)  Batch  6 
badchef  N/A  ⓘTags: Graph Theory Bad Chef  NUS CS3233 2020 (Kattis)  Batch  12 
rangedeleting  N/A  ⓘTags: Line Sweep/Sliding Window Range Deleting  CF1167E  Batch  17 
anutforajaroftuna  N/A  ⓘTags: Dynamic Programming, Greedy A Nut For A Jar Of Tuna  CF730J  Batch  17 
stories  N/A  ⓘTags: Dynamic Programming, Graph Theory Stories Cat  RI November Course Stage 2 Selection Test 2022 (AJR)  Batch  41 
garden  N/A  ⓘTags: Graph Theory Garden Cat  RI November Course Stage 2 Selection Test 2022 (tux, ryangohca)  Batch  41 
routine  N/A  ⓘTags: Binary Search Routine Cat  RI November Course Stage 2 Selection Test 2022 (wangy412)  Batch  83 
eating  N/A  ⓘTags: Data Structures Eating Cat  RI November Course Stage 2 Selection Test 2022 (wangy412)  Batch  66 
reading  N/A  ⓘTags: Math, Syntax Reading Cat  RI November Course Stage 2 Selection Test 2022 (wangy412)  Batch  78 
choochoo  N/A  ⓘTags: Syntax Choo Choo  RIHCI Final Contest 2022 (bensonlzl)  Batch  130 
superpiece  N/A  ⓘTags: Adhoc, Graph Theory Superpiece  EGOI 2022 Day 2  Batch  3 
datacenters  N/A  ⓘTags: Adhoc Data Centers  EGOI 2022 Day 2  Batch  9 
tourists  N/A  ⓘTags: Data Structures, Graph Theory, Trees Tourists  EGOI 2022 Day 1  Batch  4 
subsetmex  N/A  ⓘTags: Adhoc Subset Mex  EGOI 2022 Day 1  Batch  8 
legowall  N/A  ⓘTags: Dynamic Programming, Math Lego Wall  EGOI 2022 Day 1  Batch  5 
candycrush  N/A  ⓘTags: Dynamic Programming Candy Crush  Dunjudge Archive  Batch  1 
alternating  N/A  ⓘTags: Dynamic Programming, Greedy alternating  BOI 2018  Batch  1 
lampice  N/A  ⓘTags: Binary Search, Dynamic Programming, Graph Theory, Trees lampice  COCI 2019/2020  Batch  1 
naturalpark  N/A  ⓘTags: Graph Theory, Information Theory naturalpark  JOISC 2017  Interactive  1 
evolution  N/A  ⓘTags: Graph Theory, Trees Evolution  Korean IOI Selection Day 1  Batch  1 
dzumbus  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Džumbus  COCI 2019/2020  Batch  4 
unitedcows  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window United Cows  USACO 2021 Open, Gold  Batch  9 
flyingsquirrel  N/A  ⓘTags: Data Structures, Dynamic Programming, Greedy, Slope Trick Flying Squirrel  Korean IOI Selection Day 1  Batch  5 
delegation  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Delegation  USACO 2020 Feb, Gold  Batch  4 
sjeckanje  N/A  ⓘTags: Data Structures, Greedy sjeckanje  COCI 2020/2021  Batch  3 
joker  N/A  ⓘTags: Adhoc, Divide and Conquer, Graph Theory joker  BOI 2020  Batch  3 
sumzero  N/A  ⓘTags: Adhoc, Binary Search, Dynamic Programming sumzero  RMI 2020  Batch  6 
izbori  N/A  ⓘTags: Adhoc, Data Structures, Math izbori  COCI 2021/2022  Batch  4 
sandcastle2  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory Sandcastle 2  JOI 2022 Final Round  Batch  2 
railwaytrip2  N/A  ⓘTags: Data Structures Railway Trip 2  JOI 2022 Final Round  Batch  2 
election_joi22  N/A  ⓘTags: Dynamic Programming Let's Win the Election  JOI 2022 Final Round  Batch  8 
selfstudy  N/A  ⓘTags: Binary Search, Greedy Self Study  JOI 2022 Final Round  Batch  4 
intercastellar  N/A  ⓘTags: Adhoc Intercastellar  JOI 2022 Final Round  Batch  12 
islands  N/A  ⓘTags: Graph Theory Thousands Islands  IOI 2022 (Day 2)  Interactive  3 
insects  N/A  ⓘTags: Adhoc, Binary Search, Information Theory Rarest Insects  IOI 2022 (Day 2)  Interactive  3 
circuit  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Digital Circuit  IOI 2022 (Day 2)  Interactive  5 
towers_ioi  N/A  ⓘTags: Binary Search, Data Structures, Greedy Radio Towers  IOI 2022 (Day 1)  Interactive  2 
prison  N/A  ⓘTags: Constructive Algorithms, Divide and Conquer Prisoner Challenge  IOI 2022 (Day 1)  Interactive  4 
fish  N/A  ⓘTags: Data Structures, Dynamic Programming Catfish Farm  IOI 2022 (Day 1) (oolimry)  Interactive  6 
shopping_joi  N/A  ⓘTags: Binary Search, Data Structures, Divide and Conquer, Information Theory shopping_joi  JOISC 2021  Communication  1 
bodyguard  N/A  ⓘTags: Dynamic Programming bodyguard  JOISC 2021  Batch  3 
rainingseason  N/A  ⓘTags: Data Structures, Graph Theory, Trees rainingseason  Codeforces 1019E  Batch  4 
minerals  N/A  ⓘTags: Information Theory minerals  JOISC 2019  Interactive  8 
computergame  N/A  ⓘTags: Binary Search, Dynamic Programming, Greedy computergame  Codeforces 1067D  Batch  2 
woodenraft  N/A  ⓘTags: Greedy, Math woodenraft  Codeforces 1223G  Batch  5 
doubletrip  N/A  ⓘTags: Brute Force, Constructive Algorithms, Graph Theory Double Trip  Codeforces 1343E  Batch  13 
pizzeria  N/A  ⓘTags: Data Structures Pizzeria Queries  CSES  Batch  41 
fever  N/A  ⓘTags: Graph Theory, Greedy fever  JOISC 2021  Batch  2 
canbashsavetheday  N/A  ⓘTags: Data Structures, Graph Theory, Trees canbashsavetheday  Codeforces 757G  Batch  5 
cupboardjumps  N/A  ⓘTags: Dynamic Programming, Slope Trick cupboardjumps  Codeforces 1500F  Batch  3 
colourwalk  N/A  ⓘTags: Graph Theory Colour Walk  RIHCI Final Contest 2022  Batch  5 
markinghouses  N/A  ⓘTags: Bitmask, Dynamic Programming Marking Houses  RIHCI Final Contest 2022  Batch  8 
bigbinarytree  N/A  ⓘTags: Greedy Big Binary Tree  RIHCI Final Contest 2022 (bensonlzl)  Batch  19 
hungryrabbits2  N/A  ⓘTags: Data Structures Hungry Rabbits 2  RIHCI Final Contest 2022 (bensonlzl)  Batch  44 
hungryrabbits1  N/A  ⓘTags: Brute Force, Greedy Hungry Rabbits 1  RIHCI Final Contest 2022 (bensonlzl)  Batch  71 
elca  N/A  ⓘTags: Data Structures, Graph Theory, Trees elca  Codeforces 482E  Batch  4 
tokitsukazeandexplosion  N/A  ⓘTags: Binary Search, Greedy tokitsukazeandexplosion  Codeforces 1190E  Batch  7 
cursordistance  N/A  ⓘTags: Binary Search, Math cursordistance  Codeforces 1246F  Batch  1 
twoavenues  N/A  ⓘTags: Data Structures, Graph Theory, Trees twoavenues  Codeforces 1648F  Batch  0 
strangedevice2  N/A  ⓘTags: Binary Search, Graph Theory, Information Theory, Trees strangedevice2  Codeforces 1158E  Interactive  5 
oenothera  N/A  ⓘTags: Data Structures, Greedy, Square Root Decomposition oenothera  Codeforces 1039E  Batch  5 
learningtrack2  N/A  ⓘTags: Data Structures, Dynamic Programming learningtrack2  LOJ #3068  Batch  5 
industriouslibrarian  N/A  ⓘTags: Data Structures industriouslibrarian  LOJ #2639  Batch  8 
sarenlist  N/A  ⓘTags: Bitmask, Brute Force, Graph Theory, Trees sarenlist  COCI 2021/2022  Batch  8 
beacon  N/A  ⓘTags: Dynamic Programming, Math Beacon Towers  Grand Prix of Seoul  Batch  20 
cactus  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees cactus  LOJ #2250  Batch  7 
superpozicija  N/A  ⓘTags: Constructive Algorithms, Greedy superpozicija  COI 2022  Batch  4 
passes  N/A  ⓘTags: Bitmask, Brute Force, Greedy, Math passes  BOI 2022  Batch  8 
deletingnumbers  N/A  ⓘTags: Constructive Algorithms, Greedy Deleting Numbers  Grand Prix of Urals  Batch  42 
preciseforecast  N/A  ⓘTags: Graph Theory preciseforecast  LOJ #3101  Batch  2 
sequence_loj  N/A  ⓘTags: Graph Theory, Greedy sequence_loj  LOJ #3158  Batch  1 
flowercards  N/A  ⓘTags: Graph Theory flowercards  LOJ #536  Batch  2 
wavynumbers  N/A  ⓘTags: Brute Force, Math, Meet in the Middle wavynumbers  Codeforces 273E  Batch  5 
perishableroads  N/A  ⓘTags: Graph Theory perishableroads  Codeforces 773D  Batch  3 
cakeslicing  N/A  ⓘTags: Constructive Algorithms cakeslicing  LOJ #6744  Batch  8 
gate  N/A  ⓘTags: Data Structures, Graph Theory, Trees gate  LOJ #2474  Batch  1 
greatmerge  N/A  ⓘTags: Data Structures, Graph Theory, Trees greatmerge  LOJ #2230  Batch  3 
rainbowfish  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Rainbow Fish  Mock APIO 2015  Batch  2 
treepainting  N/A  ⓘTags: Data Structures, Graph Theory, Trees treepainting  LOJ #2001  Batch  3 
kucice  N/A  ⓘTags: Line Sweep/Sliding Window kucice  COCI 2021/2022  Batch  4 
multiplechoice  N/A  ⓘTags: Constructive Algorithms multiplechoice  USACO 2022 Jan, Platinum  Batch  6 
constellation2  N/A  ⓘTags: Line Sweep/Sliding Window constellation2  JOISC 2014  Batch  3 
winetasting  N/A  ⓘTags: Data Structures winetasting  LOJ #2133  Batch  3 
earthwormlines  N/A  ⓘTags: Data Structures earthwormlines  LOJ #2303  Batch  3 
coolslogans  N/A  ⓘTags: Data Structures coolslogans  LOJ #6288  Batch  2 
spiderclimb  N/A  ⓘTags: Dynamic Programming, Trees spiderclimb  LOJ #3661  Batch  2 
tickets_loj  N/A  ⓘTags: Divide and Conquer, Dynamic Programming, Trees tickets_loj  LOJ #2249  Batch  3 
learningtrack  N/A  ⓘTags: Divide and Conquer learningtrack  LOJ #2773  Batch  7 
buildings  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window Buildings  Dunjudge Archive  Batch  10 
thesis  N/A  ⓘTags: Binary Search, Dynamic Programming, Graph Theory, Trees thesis  LOJ #511  Batch  1 
paintbyrectangles  N/A  ⓘTags: Graph Theory, Line Sweep/Sliding Window paintbyrectangles  USACO 2022 Feb, Platinum  Batch  1 
servers  N/A  ⓘTags: Graph Theory, Trees Inside information  BOI 2021  Batch  9 
present  N/A  ⓘTags: Math present  RMI 2021  Batch  1 
nom  N/A  ⓘTags: Dynamic Programming, Math nom  RMI 2021  Batch  3 
semafor  N/A  ⓘTags: Explicitly Excluded (from IOI), Graph Theory, Math semafor  COI 2020  Batch  7 
mars  N/A  ⓘTags: Graph Theory, Information Theory Mars  APIO 2022  Interactive  2 
paint_coi  N/A  ⓘTags: Graph Theory, Square Root Decomposition paint_coi  COI 2020  Batch  2 
manymsts  N/A  ⓘTags: Binary Search, Graph Theory manymsts  LOJ #3635  Batch  1 
souvenirs  N/A  ⓘTags: Data Structures souvenirs  Codeforces 765F  Batch  5 
packaging  N/A  ⓘTags: Data Structures, Greedy, Math Packaging  Codeforces 1690E  Batch  22 
pastiri  N/A  ⓘTags: Graph Theory, Greedy, Trees pastiri  COI 2019/2020  Batch  9 
edgeremove  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees edgeremove  LOJ #3705  Batch  2 
redistributinggifts  N/A  ⓘTags: Bitmask, Dynamic Programming redistributinggifts  USACO 2022 Feb Gold  Batch  8 
travelling  N/A  ⓘTags: Math travelling  ASEAN Sparring 2022 (kevinsogo)  Batch  3 
wabot2  N/A  ⓘTags: Constructive Algorithms, Data Structures, Greedy wabot2  ASEAN Sparring 2022 (bensonlzl)  Batch  9 
kmxorm  N/A  ⓘTags: Bitmask, Math, Meet in the Middle kmxorm  ASEAN Sparring 2022 (zscoder)  Batch  10 
events  N/A  ⓘTags: Data Structures, Greedy events  BOI 2022  Batch  14 
arrangement  N/A  ⓘTags: Data Structures, Dynamic Programming, Greedy arrangement  LOJ #3327  Batch  1 
seqtransform  N/A  ⓘTags: Brute Force, Data Structures, Greedy seqtransform  LOJ #3704  Batch  4 
smokeflower  N/A  ⓘTags: Data Structures, Divide and Conquer, Line Sweep/Sliding Window smokeflower  Classic Problem  Batch  12 
zhylanio  N/A  ⓘTags: Binary Search, Brute Force, Data Structures zhylanio  IZHO 2022  Batch  4 
index  N/A  ⓘTags: Binary Search, Data Structures index  COCI 2020/2021 Contest 6  Batch  23 
urbanplanning  N/A  ⓘTags: Graph Theory, Trees urbanplanning  IZhO 2022  Batch  3 
island_boi  N/A  ⓘTags: Graph Theory, Greedy, Trees island  BOI 2022  Batch  15 
watchmen  N/A  ⓘTags: Graph Theory watchmen  BOI 2021  Batch  1 
vault  N/A  ⓘTags: Dynamic Programming, Greedy vault  BOI 2022  Batch  8 
countinghaybales  N/A  ⓘTags: Dynamic Programming countinghaybales  USACO 2022 Jan, Platinum  Batch  12 
phonenumbers  N/A  ⓘTags: Bitmask, Dynamic Programming phonenumbers  USACO 2022 Feb, Platinum  Batch  2 
perm  N/A  ⓘTags: Constructive Algorithms Permutation  APIO 2022  Interactive  5 
game  N/A  ⓘTags: Graph Theory Game  APIO 2022  Interactive  3 
prize  N/A  ⓘTags: Binary Search, Information Theory The Big Prize  IOI 2017  Interactive  2 
bingo  N/A  ⓘTags: Adhoc, Constructive Algorithms Bingo  Grand Prix of Daejeon  Batch  33 
sculptures_apio15  N/A  ⓘTags: Bitmask, Dynamic Programming Bali Sculptures  APIO 2015  Batch  5 
train_ioi  N/A  ⓘTags: Graph Theory Toy Train  IOI 2017  Interactive  2 
wiring_ioi  N/A  ⓘTags: Dynamic Programming Wiring  IOI 2017  Interactive  4 
gap  N/A  ⓘTags: Information Theory, Math Gap  APIO 2016  Interactive  14 
boat  N/A  ⓘTags: Dynamic Programming, Math Boat  APIO 2016  Batch  2 
koala  N/A  ⓘTags: Binary Search, Constructive Algorithms, Divide and Conquer, Information Theory Koala Game  APIO 2017  Interactive  2 
rainbow  N/A  ⓘTags: Data Structures, Graph Theory, Math Land of the Rainbow Gold  APIO 2017  Interactive  4 
alien10  N/A  ⓘTags: Explicitly Excluded (from IOI), Math alien10  uwu (errorgorn)  Batch  1 
tomskitchen  N/A  ⓘTags: Dynamic Programming Tom’s Kitchen  BOI 2019 Day 2  Batch  2 
visiting  N/A  ⓘTags: Graph Theory, Trees visiting  Dunjudge Archive  Batch  3 
coingame  N/A  ⓘTags: Adhoc, Explicitly Excluded (from IOI) coingame  NTST 2015  Batch  17 
funnynim  N/A  ⓘTags: Explicitly Excluded (from IOI), Math funnynim  IMO Shortlist 2015  Batch  15 
neila  N/A  ⓘTags: Adhoc, Math neila  RMM 2013/5  Batch  2 
osumnjiceni  N/A  ⓘTags: Data Structures, Greedy, Trees Osumnjičeni  COCI 2021/2022  Batch  6 
alien9  N/A  ⓘTags: Adhoc, Dynamic Programming, Math alien9  IMO Shortlist 1996  Batch  9 
streetlamps_ex  N/A  ⓘTags: Data Structures, Divide and Conquer Street Lamps!!  APIO 2019 but with more pain  Batch  2 
alice  N/A  ⓘTags: Graph Theory, Information Theory Alice  IMO Shortlist 2019  Interactive  5 
factories  N/A  ⓘTags: Data Structures, Divide and Conquer, Graph Theory, Trees factories  JOI 2014 Open  Interactive  21 
firecracker  N/A  ⓘTags: Data Structures, Greedy firecracker  CNY Contest 2019  Batch  12 
bananadance  N/A  ⓘTags: Math bananadance  Dunjudge Archive  Batch  5 
sumo  N/A  ⓘTags: Binary Search, Graph Theory sumo  COCI 2013/2014  Batch  11 
election_joi  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Election Campaign  JOI Open 2015  Batch  3 
valley  N/A  ⓘTags: Divide and Conquer, Graph Theory, Trees Alpine valley  BOI 2019 Day 1  Batch  12 
binaryseq  N/A  ⓘTags: Math BinarySeq  Dunjudge Archive (bensonlzl)  Batch  1 
kusac  N/A  ⓘTags: Math, Syntax kusac  COCI 2013/2014  Batch  26 
gathering  N/A  ⓘTags: Graph Theory, Greedy gathering  USACO 2018 December Platinum  Batch  1 
ples  N/A  ⓘTags: Greedy ples  COCI 2011/2012  Batch  3 
convention  N/A  ⓘTags: Binary Search, Greedy convention  USACO 2018 December Silver  Batch  12 
sequence  N/A  ⓘTags: Adhoc, Greedy sequence  AtCoder  Batch  3 
iqtest2  N/A  ⓘTags: Math iqtest2  April Fools' 2022 (errorgorn)  Batch  33 
kronican  N/A  ⓘTags: Bitmask, Dynamic Programming kronican  COCI 2016/2017  Batch  5 
maxmex  N/A  ⓘTags: Data Structures, Graph Theory, Trees Max Mex  Dunjudge Archive  Batch  1 
paleta  N/A  ⓘTags: Dynamic Programming, Graph Theory, Math paleta  COCI 2013/2014  Batch  2 
closedpath  N/A  ⓘTags: Graph Theory, Trees closedpath  Dunjudge Archive  Batch  15 
mountain  N/A  ⓘTags: Data Structures Mountain  IOI 2005  Batch  1 
papplesort  N/A  ⓘTags: Data Structures papplesort  Dunjudge Archive  Batch  3 
camels  N/A  ⓘTags: Data Structures Guessing Camels  NWERC 2015  Batch  8 
flowering  N/A  ⓘTags: Data Structures flowering  COCI 2008/2009  Batch  16 
inversionsum  N/A  ⓘTags: Dynamic Programming, Math inversionsum  Dunjudge Archive  Batch  2 
rabbitradar  N/A  ⓘTags: Data Structures, Dynamic Programming rabbitradar  Dunjudge Archive (bensonlzl)  Batch  4 
manhattancompass  N/A  ⓘTags: Binary Search, Graph Theory manhattancompass  AtCoder  Batch  4 
graph  N/A  ⓘTags: Graph Theory, Greedy, Trees graph  Dunjudge Archive  Batch  8 
decayedbridges  N/A  ⓘTags: Graph Theory decayedbridges  Dunjudge Archive  Batch  35 
goodseq  N/A  ⓘTags: Data Structures goodseq  Dunjudge Archive  Batch  57 
ballsofbuma  N/A  ⓘTags: Adhoc Balls of Buma  Dunjudge Archive  Batch  9 
ispit  N/A  ⓘTags: Adhoc ispit  COCI 2018/2019  Batch  5 
mathtest  N/A  ⓘTags: Math, Syntax mathtest  Dunjudge Archive  Batch  24 
network2  N/A  ⓘTags: Data Structures, Graph Theory, Trees network  Dunjudge Archive  Batch  5 
repairs  N/A  ⓘTags: Data Structures, Graph Theory, Trees repairs  Dunjudge Archive  Batch  14 
grassplant  N/A  ⓘTags: Data Structures, Graph Theory, Trees Grass Planting  Dunjudge Archive  Batch  38 
cowland  N/A  ⓘTags: Data Structures, Graph Theory, Trees Cow Land  USACO 2019 February Contest, Gold  Batch  22 
foodchain  N/A  ⓘTags: Math, Syntax Food Chain  Dec Trg 2019 (Elementary)  Batch  124 
rating  N/A  ⓘTags: Adhoc, Math Rating Changes  Dec Trg 2019 (Elementary)  Batch  16 
cross  N/A  ⓘTags: Dynamic Programming Cross  Dunjudge Archive  Batch  5 
trespasser  N/A  ⓘTags: Bitmask, Information Theory ADVANCED Trespasser  2019 IOI Problem Setter Contest (bensonlzl)  Interactive  2 
enumeratingbrackets  N/A  ⓘTags: Dynamic Programming Enumerating Brackets  Waterloo Programming Contest 20161001  Batch  3 
fruits_noi  N/A  ⓘTags: Data Structures, Dynamic Programming Fruits  NOI 2022 Finals (bensonlzl)  Batch  1 
grapevine  N/A  ⓘTags: Data Structures, Divide and Conquer, Graph Theory, Trees Grapevine  NOI 2022 Finals  Batch  10 
towers_noi  N/A  ⓘTags: Constructive Algorithms, Data Structures, Greedy Towers  NOI 2022 Finals  Batch  14 
gymbadges  N/A  ⓘTags: Dynamic Programming, Greedy Gym Badges  NOI 2022 Finals  Batch  36 
votingcities  N/A  ⓘTags: Bitmask, Graph Theory Voting Cities  NOI 2022 Finals  Batch  34 
rarkids  N/A  ⓘTags: Constructive Algorithms, Math rarkids  IOI Sparring 2018 SGP  Interactive  2 
hanabi  N/A  ⓘTags: Binary Search, Data Structures hanabi  IOI Sparring 2018 SGP  Batch  1 
weddingcity  N/A  ⓘTags: Constructive Algorithms, Graph Theory weddingcity  IOI Sparring 2018 SGP  Batch  2 
wheelofmisfortune  N/A  ⓘTags: Adhoc, Brute Force, Math Wheel of Misfortune  IOI 2020 Practice Session  Batch  1 
cakeatstake  N/A  ⓘTags: Data Structures Cake at Stake  IOI 2020 Practice Session  Batch  2 
triumvirate  N/A  ⓘTags: Dynamic Programming Triumvirate  IOI 2020 Practice Session  Batch  2 
cellulardata  N/A  ⓘTags: Bitmask, Dynamic Programming, Explicitly Excluded (from IOI), Math Cellular Data  IOI 2020 Practice Session  Batch  1 
trackingtraining  N/A  ⓘTags: Graph Theory, Math Tracking Training  IOI 2020 Practice Session  Batch  3 
goneviral  N/A  ⓘTags: Binary Search, Graph Theory Gone Viral  IOI 2020 Practice Session  Batch  2 
wakeup  N/A  ⓘTags: Binary Search, Data Structures Wake Up  IOI 2020 Practice Session  Batch  1 
wearenumberone  N/A  ⓘTags: Graph Theory We Are Number One  IOI 2020 Practice Session  Batch  2 
powerpoints  N/A  ⓘTags: Constructive Algorithms Power Points  IOI 2020 Practice Session  Batch  2 
idigit  N/A  ⓘTags: Bitmask, Math I Dig It!  IOI 2020 Practice Session  Batch  1 
styles  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming Styles  IOI 2020 Practice Session  Batch  2 
synergies  N/A  ⓘTags: Constructive Algorithms, Graph Theory Synergies  IOI 2020 Practice Session  Batch  2 
supermarkets  N/A  ⓘTags: Data Structures Supermarkets  IOI 2020 Practice Session  Batch  3 
filibuster  N/A  ⓘTags: Data Structures Filibuster  IOI 2020 Practice Session  Batch  2 
firing  N/A  ⓘTags: Data Structures Firing  IOI 2020 Practice Session  Batch  2 
figures  N/A  ⓘTags: Binary Search, Dynamic Programming Figures  IOI 2020 Practice Session  Batch  2 
banks  N/A  ⓘTags: Graph Theory Banks  IOI 2020 Practice Session  Batch  8 
generosity  N/A  ⓘTags: Joke Generosity  April Fools' 2022 (oolimry)  Batch  121 
alphabrackets  N/A  ⓘTags: Data Structures, Dynamic Programming alphabrackets  Dec Course Final Contest 2017  Batch  3 
luckynumbers2  N/A  ⓘTags: Math luckynumbers2  Dec Course Final Contest 2017  Batch  35 
cattown  N/A  ⓘTags: Graph Theory Cat Town  RI/RJC NOI Selection Test 2016  Batch  1 
trekking  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory Jungle Trekking  HCI NOI Selection Test 2017  Batch  7 
builderswand  N/A  ⓘTags: Dynamic Programming Builder’s Wand  HCI NOI Selection Test 2017  Batch  2 
mooshroomfarm  N/A  ⓘTags: Data Structures Mooshroom Farm  HCI NOI Selection Test 2017  Batch  1 
redstonelamps  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Redstone Lamps  HCI NOI Selection Test 2017  Batch  1 
trianglecraft  N/A  ⓘTags: Math Trianglecraft  HCI NOI Selection Test 2017  Batch  1 
hop  N/A  ⓘTags: Math hop  COCI 2020/2021 Contest #4 Problem 3  Batch  8 
dinnerbox  N/A  ⓘTags: Dynamic Programming, Greedy Jianzhi’s Dinner Box  RI NOI Selection Test 2017  Batch  4 
lost  N/A  ⓘTags: Bitmask, Information Theory Jianzhi’s Lost  RI NOI Selection Test 2017  Interactive  2 
clipboard  N/A  ⓘTags: Adhoc, Data Structures Jianzhi’s Clipboard Sorting  RI NOI Selection Test 2017  Batch  7 
mushroomfarm  N/A  ⓘTags: Binary Search, Dynamic Programming Jianzhi’s Mushroom Farm  RI NOI Selection Test 2017  Batch  20 
spiraldance  N/A  ⓘTags: Adhoc, Math Estelle’s Spiral Dance  RIHCI NOI Selection Test 2018  Batch  5 
spotlights  N/A  ⓘTags: Adhoc Estelle’s Concert Spotlights  RIHCI NOI Selection Test 2018  Batch  2 
superfanclub  N/A  ⓘTags: Graph Theory, Trees Estelle’s Super Fan Club  RIHCI NOI Selection Test 2018  Interactive  3 
stagegames_part2  N/A  ⓘTags: Adhoc, Information Theory Estelle’s Stage Games (Subtasks 6  10)  RIHCI NOI Selection Test 2018  Interactive  2 
stagegames_part1  N/A  ⓘTags: Adhoc, Information Theory Estelle’s Stage Games (Subtasks 1  5)  RIHCI NOI Selection Test 2018  Interactive  2 
rookable  N/A  ⓘTags: Graph Theory Rookable  NUSH NOI Selection Test 2018  Batch  1 
crab  N/A  ⓘTags: Bitmask, Dynamic Programming Crab  NUSH NOI Selection Test 2018  Batch  1 
secret_mco  N/A  ⓘTags: Adhoc, Explicitly Excluded (from IOI) Secret  MCO 2015  Batch  3 
penghulu  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Penghulu  MCO 2016  Batch  4 
chefmala  N/A  ⓘTags: Data Structures chefmala  CodeChef February Lunchtime 2022 (errorgorn)  Batch  1 
centroid  N/A  ⓘTags: Brute Force, Graph Theory Centroid  Dunjudge Archive  Batch  15 
forkintheroad  N/A  ⓘTags: Dynamic Programming, Graph Theory, Math forkintheroad  AtCoder  Batch  2 
shortest  N/A  ⓘTags: Explicitly Excluded (from IOI), Math shortest  Dunjudge Archive  Batch  34 
harvest  N/A  ⓘTags: Data Structures Harvest  JOI 2019/2020  Batch  3 
cantor_ex  N/A  ⓘTags: Binary Search, Information Theory cantor_ex  Valentine's Day Contest 2022 (errorgorn)  Interactive  2 
cantor  N/A  ⓘTags: Binary Search, Information Theory cantor  TROC 24 (errorgorn)  Interactive  3 
killanton_ex  N/A  ⓘTags: Bitmask, Dynamic Programming killanton_ex  Valentine's Day Contest 2022 (errorgorn)  Batch  2 
kronecker  N/A  ⓘTags: Math kronecker  Valentine's Day Contest 2022 (errorgorn)  Batch  1 
lboard  N/A  ⓘTags: Brute Force, Dynamic Programming LBoard  NOI 2022 Qualification  Batch  82 
dragonfly  N/A  ⓘTags: Data Structures, Graph Theory, Trees dragonfly  NOI 2022 Qualification (bensonlzl)  Batch  15 
treecutting  N/A  ⓘTags: Brute Force, Graph Theory, Trees Tree Cutting  NOI 2022 Qualification  Batch  33 
usefft3  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 3  Valentine's Day Contest 2022 (errorgorn)  Batch  1 
iqtest  N/A  ⓘTags: Math iqtest  Valentine's Day Contest 2022 (errorgorn)  Batch  58 
usefft1  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 1  Classic Problem  Batch  8 
stoningame  N/A  ⓘTags: Math stoningame  Valentine's Day Contest 2022 (maomao90)  Batch  11 
permutationswap  N/A  ⓘTags: Adhoc permutationswap  Valentine's Day Contest 2022 (maomao90)  Batch  7 
usefft2  N/A  ⓘTags: Math Use FFT 2  Valentine's Day Contest 2022 (errorgorn)  Batch  1 
pandasoldiers  N/A  ⓘTags: Adhoc, Data Structures Soldiers  Dunjudge Archive  Batch  4 
rabbitgifts  N/A  ⓘTags: Data Structures, Math rabbitgifts  December Course 2018 Advanced Final Contest  Batch  2 
rabbitmeeting  N/A  ⓘTags: Adhoc, Greedy RabbitMeeting  December Course 2018 Advanced Final Contest  Batch  14 
taxes  N/A  ⓘTags: Data Structures, Dynamic Programming, Square Root Decomposition taxes  December Course 2018 Advanced Final Contest, ROI 2018 Day 1  Batch  3 
couples  N/A  ⓘTags: Dynamic Programming couples  December Course 2018 Advanced Final Contest  Batch  5 
addsubtract  N/A  ⓘTags: Dynamic Programming, Greedy addsubtract  Dunjudge Archive  Batch  3 
deda  N/A  ⓘTags: Binary Search, Data Structures deda  COCI 2017/2018  Batch  10 
snakecode  N/A  ⓘTags: Dynamic Programming snakecode  Dunjudge Archive  Interactive  9 
colour  N/A  ⓘTags: Data Structures colour  December Course 2018 Elementary Final Contest  Batch  15 
bunchlocks  N/A  ⓘTags: Graph Theory bunchlocks  Dunjudge Archive  Batch  6 
dateornot  N/A  ⓘTags: Binary Search, Information Theory Date Or Not?  Dunjudge Archive  Interactive  4 
thunderstorm  N/A  ⓘTags: Data Structures, Greedy Thunderstorm  Dec Trg 2019 (Elementary)  Batch  10 
multiple  N/A  ⓘTags: Graph Theory, Math multiple  Dunjudge Archive  Batch  7 
globalwarming_ex  N/A  ⓘTags: Data Structures, Graph Theory globalwarming_ex  Dunjudge Archive  Batch  6 
climatechange  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming climatechange  Dunjudge Archive  Batch  6 
notebook  N/A  ⓘTags: Graph Theory notebook  Dunjudge Archive  Batch  7 
ratar  N/A  ⓘTags: Brute Force, Dynamic Programming ratar  COCI 2013/2014  Batch  7 
morepaths  N/A  ⓘTags: Dynamic Programming morepaths  Dunjudge Archive  Batch  7 
dquery  N/A  ⓘTags: Data Structures, Square Root Decomposition dquery  Classic Problem  Batch  39 
hipercijevi  N/A  ⓘTags: Graph Theory hipercijevi  COCI 2012/2013  Batch  15 
math  N/A  ⓘTags: Brute Force, Math Primes Up  April Fools Contest 2020 (shenxy13)  Batch  11 
4cuts  N/A  ⓘTags: Adhoc, Brute Force 4cuts  Dunjudge Archive  Batch  4 
robot2  N/A  ⓘTags: Adhoc, Binary Search, Line Sweep/Sliding Window robot2  Dunjudge Archive  Batch  4 
joke  N/A  ⓘTags: Graph Theory Joke  Dec Trg 2019 (Elementary)  Batch  9 
nutritionist  N/A  ⓘTags: Data Structures nutritionist  Dunjudge Archive  Batch  3 
bore  N/A  ⓘTags: Brute Force Boring  Dunjudge Archive  Batch  4 
subwaytrip  N/A  ⓘTags: Graph Theory subwaytrip  Dunjudge Archive  Batch  3 
compact  N/A  ⓘTags: Data Structures, Dynamic Programming compact  Dunjudge Archive  Batch  9 
trianglesum  N/A  ⓘTags: Brute Force, Dynamic Programming trianglesum  NOI 2010 Selection Test  Batch  5 
mrbeancurd  N/A  ⓘTags: Dynamic Programming mrbeancurd  HCI Be A Problem Setter (BAPS) Contest 2017  Batch  11 
walk  N/A  ⓘTags: Graph Theory Sky Walking  IOI 2019  Interactive  3 
vision  N/A  ⓘTags: Adhoc, Constructive Algorithms, Information Theory Vision Program  IOI 2019  Interactive  4 
rect  N/A  ⓘTags: Brute Force, Data Structures Rectangle  IOI 2019 (Day 1)  Interactive  3 
shoes  N/A  ⓘTags: Data Structures, Greedy Arranging Shoes  IOI 2019 (Day 1)  Interactive  8 
planning  N/A  ⓘTags: Graph Theory, Greedy, Trees Company Planning  TOKI Open 2014  Batch  16 
prisoners  N/A  ⓘTags: Adhoc, Graph Theory, Information Theory prisoners  APIO 2014 Mock Contest  Communication  9 
inequality3  N/A  ⓘTags: Data Structures Social Inequality  TOKI Open 2014  Batch  10 
rolling  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Rolling  Dunjudge Archive  Batch  28 
triusis  N/A  ⓘTags: Data Structures, Dynamic Programming Rabbit Carrot  Lithuanian Olympiad in Informatics 2019  Batch  22 
subtaskstitching  N/A  ⓘTags: Joke subtaskstitching  Codebreaker Development  Batch  156 
secret  N/A  ⓘTags: Divide and Conquer, Information Theory Secret  JOI Open 2014  Interactive  11 
grazing  N/A  ⓘTags: Bitmask, Brute Force, Graph Theory grazing  USACO Bronze Jan 2012  Batch  4 
wallisstop  N/A  ⓘTags: Binary Search, Data Structures, Graph Theory Wall Is Stop  Dunjudge Archive (bensonlzl)  Batch  5 
youngmaids  N/A  ⓘTags: Data Structures youngmaids  Dunjudge Archive  Batch  7 
toy  N/A  ⓘTags: Graph Theory, Trees toy  ROI 2014  Batch  4 
stations  N/A  ⓘTags: Graph Theory, Information Theory, Trees Stations  IOI 2020 (Day 2)  Communication  10 
3dhistogram  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming 3D Histogram  COCI 2020  Batch  4 
outing  N/A  ⓘTags: Data Structures Outing  Educational Round 10 (Goodbye cstuart and kai824) (kai824)  Batch  13 
devil  N/A  ⓘTags: Constructive Algorithms, Graph Theory The Devil's Algorithm  Hello 2022 (errorgorn)  Batch  4 
prefixsums2  N/A  ⓘTags: Math Prefix Sums 2  Educational Round 10 (Goodbye cstuart and kai824) (errorgorn)  Batch  6 
qualitycontrol  N/A  ⓘTags: Graph Theory, Trees Quality Control  Educational Round 10 (Goodbye cstuart and kai824) (cstuart)  Batch  7 
inequality2  N/A  ⓘTags: Adhoc, Constructive Algorithms inequality2  Dec Course 2021 BAPS (zaneyu)  Batch  15 
prefixgcd  N/A  ⓘTags: Adhoc, Brute Force, Math prefixgcd  Dec Course 2021 BAPS (jiahng)  Batch  22 
eexploration  N/A  ⓘTags: Graph Theory Elementary Exploration  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  28 
eeducation  N/A  ⓘTags: Syntax Elementary Education  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  141 
eevacuation  N/A  ⓘTags: Dynamic Programming, Graph Theory Elementary Evacuation  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  69 
eescapism  N/A  ⓘTags: Adhoc, Math Elementary Escapism  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  100 
eelimination  N/A  ⓘTags: Data Structures Elementary Elimination  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  96 
dice  N/A  ⓘTags: Math Dice  Dec Course 2021 BAPS (origami100, dillion)  Batch  28 
openingshop  N/A  ⓘTags: Greedy Opening Shop  Dec Course 2021 BAPS (Halogen)  Batch  21 
gerrymandering  N/A  ⓘTags: Dynamic Programming Gerrymandering  Dec Course 2021 BAPS (beepbeepsheep)  Batch  21 
bitaro  N/A  ⓘTags: Dynamic Programming, Graph Theory, Square Root Decomposition Bitaro's Party  JOI 2017/2018 Spring Camp  Batch  9 
triangles  N/A  ⓘTags: Graph Theory, Square Root Decomposition Counting Triangles  Classic Problem  Batch  19 
more_lca2  N/A  ⓘTags: Graph Theory, Trees More LCA 2  Educational Round 10 (Goodbye cstuart and kai824) (cstuart)  Interactive  13 
selfpermutation  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming selfpermutation  TOKI KSN Day 2  Batch  12 
linearbasis  N/A  ⓘTags: Explicitly Excluded (from IOI), Math linearbasis  Hello 2022 (errorgorn)  Batch  3 
frog3  N/A  ⓘTags: Dynamic Programming Frog 3  Atcoder Educational DP Contest  Batch  46 
rabbitbars  N/A  ⓘTags: Binary Search, Data Structures, Divide and Conquer, Dynamic Programming rabbitbars  Dunjudge Archive (bensonlzl)  Batch  17 
queuestack  N/A  ⓘTags: Adhoc, Data Structures Queuestack  Educational Round 10 (Goodbye cstuart and kai824) (lida, oolimry, cstuart)  Batch  5 
addition2  N/A  ⓘTags: Joke Addition?  Hello 2022 (oolimry)  Batch  223 
helloworld2  N/A  ⓘTags: Joke Hello World?  Hello 2022 (jamessng)  Batch  132 
fiboregisters  N/A  ⓘTags: Adhoc, Constructive Algorithms, Math IOI Registers: but epic  TROC 24 (errorgorn)  Batch  2 
shopping  N/A  ⓘTags: Dynamic Programming Shopping  Dunjudge Archive  Batch  9 
pawns  N/A  ⓘTags: Adhoc, Explicitly Excluded (from IOI), Math e4e5 Ke2? Ke7?  TROC 24 (maomao90, errorgorn)  Batch  3 
ninjashard  N/A  ⓘTags: Data Structures Ninjas (Hard)  TROC 24 (oolimry, errorgorn)  Batch  2 
ninjaseasy  N/A  ⓘTags: Data Structures Ninjas (Easy)  TROC 24 (oolimry)  Batch  2 
ktupleflip  N/A  ⓘTags: Adhoc, Greedy Ktuple Flip  TROC 24 (errorgorn)  Batch  6 
doubleflip  N/A  ⓘTags: Adhoc Double Flip  TROC 24 (errorgorn)  Batch  19 
singleflip  N/A  ⓘTags: Syntax Single Flip  TROC 24 (maomao90)  Batch  45 
newlottery  N/A  ⓘTags: Dynamic Programming New Lottery  Google Code Jam 2014  Batch  4 
domine  N/A  ⓘTags: Bitmask, Dynamic Programming domine  COCI 2013/2014  Batch  14 
boxoffice  N/A  ⓘTags: Brute Force, Data Structures Box Office  Dunjudge Archive  Batch  3 
more_lca  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees More LCA  Educational Round 10 (Goodbye cstuart and kai824) (cstuart)  Interactive  15 
weightedguess  N/A  ⓘTags: Dynamic Programming Weighted Guess  Educational Round 10 (Goodbye cstuart and kai824) (cstuart)  Interactive  9 
power  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees power  JOI  Batch  20 
mergers  N/A  ⓘTags: Adhoc, Data Structures, Graph Theory, Trees mergers  JOI  Batch  12 
wandering  N/A  ⓘTags: Data Structures, Graph Theory, Trees wandering  AGC 029  Batch  8 
hoofpaperscissor  N/A  ⓘTags: Dynamic Programming Hoof, Paper, Scissors  USACO 2017 January Contest, Gold  Batch  36 
grid  N/A  ⓘTags: Dynamic Programming Grid  Atcoder Educational DP Contest  Batch  96 
pythonindentation  N/A  ⓘTags: Dynamic Programming pythonindentation  Codeforces 909C  Batch  30 
straight  N/A  ⓘTags: Bitmask, Dynamic Programming Pure Straight  ARC 126  Batch  12 
digitsum  N/A  ⓘTags: Dynamic Programming digitsum  UOJ Easy Round #4  Batch  10 
peddler  N/A  ⓘTags: Dynamic Programming, Graph Theory Peddler  ABC 188  Batch  55 
bank  N/A  ⓘTags: Bitmask, Dynamic Programming Bank  IZhO 2014 Day 1  Batch  32 
01knapsack  N/A  ⓘTags: Dynamic Programming 01 Knapsack  Classic problem (Atcoder Educational DP Contest)  Batch  136 
voting  N/A  ⓘTags: Data Structures, Greedy Voting  Dunjudge Archive  Batch  4 
leave  N/A  ⓘTags: Data Structures leave  Dunjudge Archive  Batch  68 
guessqueue  N/A  ⓘTags: Brute Force, Data Structures Guess the Queue  Kattis (modified) (ryangohca)  Batch  61 
woodcutter  N/A  ⓘTags: Brute Force, Data Structures Woodcutter  Codeforces 527C (modified)  Interactive  19 
sandwich  N/A  ⓘTags: Divide and Conquer Sandwich  HCINUSH NOI Selection 2022 (errorgorn, oolimry, yanhao)  Batch  5 
battleship  N/A  ⓘTags: Bitmask, Constructive Algorithms, Divide and Conquer Battleship  HCINUSH NOI Selection 2022 (errorgorn)  Interactive  18 
jumper  N/A  ⓘTags: Brute Force, Data Structures, Line Sweep/Sliding Window Manhattan Jumper  HCINUSH NOI Selection 2022 (errorgorn)  Batch  19 
boundedpermutation  N/A  ⓘTags: Adhoc, Dynamic Programming, Math Bounded Permutation  HCINUSH NOI Selection 2022 (maomao90)  Batch  53 
flappyrabbit  N/A  ⓘTags: Greedy Flappy Rabbit  HCINUSH NOI Selection 2022 (pavement)  Interactive  72 
727  N/A  ⓘTags: Greedy, Math 727  HCINUSH NOI Selection 2022 (errorgorn)  Batch  85 
uniquepath  N/A  ⓘTags: Graph Theory uniquepath  AGC38D  Batch  10 
spy  N/A  ⓘTags: Data Structures, Graph Theory, Trees spy  2013 IOI Japan National Team Selection Test Day 2  Batch  16 
bosses  N/A  ⓘTags: Brute Force, Graph Theory, Greedy, Trees bosses  BOI 2016  Batch  49 
roots  N/A  ⓘTags: Data Structures, Graph Theory, Trees roots  Codeforces 695E  Batch  13 
typicalstairs  N/A  ⓘTags: Dynamic Programming Typical Stairs  ABC 129  Batch  105 
vainish  N/A  ⓘTags: Dynamic Programming Vanish  20152016 NOI Training Diagnostic Test  Batch  59 
postcard  N/A  ⓘTags: Dynamic Programming postcard  Codeforces 4D  Batch  24 
duckwalk  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming duckwalk  Codeforces 76F  Batch  13 
selfdefence  N/A  ⓘTags: Dynamic Programming Self Defence  TOKI KSN Day 1  Batch  10 
deque  N/A  ⓘTags: Dynamic Programming Deque  AtCoder Educational DP Contest  Batch  66 
partitiongame  N/A  ⓘTags: Data Structures, Dynamic Programming Partition Game  Codeforces 1527E  Batch  23 
stringsofimpurity  N/A  ⓘTags: Binary Search stringsofimpurity  AtCoder  Batch  23 
logs  N/A  ⓘTags: Binary Search logs  AtCoder  Batch  53 
snukethewizard  N/A  ⓘTags: Adhoc, Binary Search snukethewizard  AtCoder  Batch  9 
library  N/A  ⓘTags: Binary Search, Information Theory Library  JOI 2018/2019 Spring Camp Day 4  Interactive  1 
potatoqueue  N/A  ⓘTags: Data Structures potatoqueue  Dunjudge Archive  Interactive  18 
minstack  N/A  ⓘTags: Data Structures minstack  Dunjudge Archive  Interactive  80 
knapsack2  N/A  ⓘTags: Dynamic Programming knapsack2  David Pisinger (1995)  Batch  3 
wiring  N/A  ⓘTags: Adhoc, Greedy Fix Wiring  Polish Collegiate Programming Contest 2021  Batch  5 
stickytape  N/A  ⓘTags: Greedy Sticky Tape  Classic Problem  Batch  73 
cp2booksales  N/A  ⓘTags: Line Sweep/Sliding Window cp2booksales  Dunjudge Archive  Batch  11 
sale  N/A  ⓘTags: Data Structures, Greedy sale  Dunjudge Archive  Batch  7 
brackets  N/A  ⓘTags: Greedy, Slope Trick Bracket Subsequence  Classic Problem (zengminghao)  Batch  36 
travel  N/A  ⓘTags: Greedy Travel  CCO 2015  Batch  51 
relutree  N/A  ⓘTags: Data Structures relutree  Classic Problem (errorgorn)  Batch  5 
hacking  N/A  ⓘTags: Graph Theory Hacking  Classic problem (fyss006)  Batch  59 
hamster1  N/A  ⓘTags: Dynamic Programming Hamster's Journey  Atcoder Educational DP Contest  Batch  79 
fractions  N/A  ⓘTags: Syntax fractions  Classic Problem (YeoBL20)  Batch  105 
medianstring  N/A  ⓘTags: Syntax medianstring  Dunjudge Archive  Batch  250 
descsort  N/A  ⓘTags: Syntax descsort  Dunjudge Archive  Batch  254 
xortree  N/A  ⓘTags: Data Structures xortree  Classic Problem (errorgorn)  Batch  9 
fibotree  N/A  ⓘTags: Data Structures, Explicitly Excluded (from IOI), Math fibotree  Bubble Cup 14 (modified)  Batch  4 
stackweights  N/A  ⓘTags: Data Structures stackweights  CSES Problem Set  Batch  28 
synchronization  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Synchronization  JOI Open Contest 2013  Batch  4 
rectangleoutline  N/A  ⓘTags: Dynamic Programming, Line Sweep/Sliding Window Rectangle Outline  USACO 2016 January Contest, Platinum  Batch  46 
picnic  N/A  ⓘTags: Binary Search, Greedy Picnic  Codeforces Global Round 17  Batch  65 
management  N/A  ⓘTags: Syntax Management  ABC163C  Batch  170 
gotoschool  N/A  ⓘTags: Syntax Go To School  ABC142  Batch  256 
typo  N/A  ⓘTags: Syntax Typo  ABC221  Batch  224 
workload_ex  N/A  ⓘTags: Explicitly Excluded (from IOI), Math workload_ex  Classic Problem in China (Probably) (errorgorn)  Batch  4 
gravity  N/A  ⓘTags: Graph Theory gravity  USACO 2013 US Open, SIlver  Batch  4 
eatcake  N/A  ⓘTags: Divide and Conquer Eating Cake  Educational Codeforces Round 94  Batch  48 
workload2  N/A  ⓘTags: Square Root Decomposition Workload 2  Dec Course 2021 Intermediate Contest 4 (Data Structures III) (errorgorn)  Batch  6 
christmaxtrees  N/A  ⓘTags: Graph Theory, Greedy christmaxtrees  Codeforces 1283D  Batch  32 
distribution  N/A  ⓘTags: Bitmask, Constructive Algorithms, Meet in the Middle Distribution  Codechef January CookOff 2021  Batch  14 
segmenttree3  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window segmenttree3  Dec Course 2021 Intermediate Contest 4 (Data Structures III) (errorgorn, oolimry)  Batch  11 
problematicjourney  N/A  ⓘTags: Binary Search, Graph Theory Problematic Journey  Classic Problem  Batch  84 
zooqueue  N/A  ⓘTags: Data Structures Zoo Queue  NUS December Training 2021 Diagnostic Test (shenxy13)  Batch  84 
workload  N/A  ⓘTags: Dynamic Programming December Training Workload  Classic Problem  Batch  87 
fizzbuzz  N/A  ⓘTags: Math, Syntax FizzBuzz  Classic Problem  Batch  514 
aircon  N/A  ⓘTags: Data Structures aircon  Codeforces Round #757 (Div. 2)  Batch  39 
cups  N/A  ⓘTags: Data Structures cups  Deccourse 2021 DS II Contest (errorgorn)  Batch  122 
lambsrespite  N/A  ⓘTags: Data Structures Lamb's Respite  XXII Open Cup. Grand Prix of Korea  Batch  12 
digits  N/A  ⓘTags: Data Structures digits  Deccourse 2021 DS II Contest (errorgorn)  Batch  69 
wall  N/A  ⓘTags: Data Structures wall  IOI 2014  Interactive  12 
rabbitpainting  N/A  ⓘTags: Greedy rabbitpainting  Dunjudge Archive (bensonlzl)  Batch  20 
vouchers  N/A  ⓘTags: Dynamic Programming vouchers  Dunjudge Archive  Batch  22 
lps  N/A  ⓘTags: Dynamic Programming lps  Dunjudge Archive  Batch  45 
entropy2  N/A  ⓘTags: Adhoc, Brute Force entropy2  RI December Course Selection Test 2021 (kym)  Batch  59 
feedthewallabies  N/A  ⓘTags: Graph Theory Feed the Wallabies  RI December Course Selection Test 2021 (syy)  Batch  33 
clocktower  N/A  ⓘTags: Math, Syntax Clock Tower  RI December Course Selection Test 2021 (Deadeye)  Batch  139 
pillars  N/A  ⓘTags: Data Structures Pillars  RI December Course Selection Test 2021 (rs)  Batch  22 
wallabyhop  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window Wallaby Hop  RI December Course Selection Test 2021 (jiahng)  Batch  29 
summarizing2021  N/A  ⓘTags: Explicitly Excluded (from IOI) 🗿🗿🗿  Hello 2022 (errorgorn)  Interactive  17 
wabbitosu  N/A  ⓘTags: Adhoc, Data Structures, Greedy Wabbit osu!taiko  HCI December Course Selection 2021 (bensonlzl)  Batch  17 
minimetro  N/A  ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window Minimetro  HCI December Course Selection 2021 (huangqr)  Batch  15 
drones  N/A  ⓘTags: Graph Theory Drones  HCI December Course Selection 2021 (cstuart)  Batch  55 
pavement  N/A  ⓘTags: Constructive Algorithms, Greedy Painting Pavements  HCI December Course Selection 2021 (pavement)  Batch  25 
swapsort  N/A  ⓘTags: Adhoc Swap Sort  HCI December Course Selection 2021 (kai824, pavement)  Batch  152 
reciprocals  N/A  ⓘTags: Constructive Algorithms, Syntax Reciprocals  HCI December Course Selection 2021 (huangqr, pavement)  Batch  122 
ladybugs  N/A  ⓘTags: Dynamic Programming ladybugs  Dunjudge Archive  Batch  47 
letters  N/A  ⓘTags: Dynamic Programming letters  Dunjudge Archive  Batch  71 
lol  N/A  ⓘTags: Dynamic Programming lol  Dunjudge Archive  Batch  77 
exoticplants  N/A  ⓘTags: Graph Theory Exotic Plants  Luogu P4568 [JLOI2011]  Batch  22 
razlika  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window razlika  COCI 2013  Batch  96 
prefixsums  N/A  ⓘTags: Dynamic Programming, Syntax prefixsums  Classic Problem (YeoBL20)  Batch  280 
equals  N/A  ⓘTags: Graph Theory equals  ARC 097  Batch  18 
kthsubstring  N/A  ⓘTags: Adhoc kthsubstring  ARC 097  Batch  41 
dominoes  N/A  ⓘTags: Binary Search, Data Structures, Square Root Decomposition dominoes  Educational Round 9 (maomao90, zaneyu)  Batch  7 
coins  N/A  ⓘTags: Information Theory Coins  IOI 2017 Practice  Communication  2 
binomial  N/A  ⓘTags: Math binomial  Dunjudge Archive  Batch  20 
boxes_hkicpc  N/A  ⓘTags: Graph Theory, Trees Boxes  2016 ACM ICPC Asia Hong Kong Regional  Batch  24 
hunter  N/A  ⓘTags: Graph Theory, Trees Hunter  Dunjudge Archive (bensonlzl)  Interactive  20 
closedrooms  N/A  ⓘTags: Adhoc, Graph Theory closedrooms  AtCoder Grand Contest 014  Batch  41 
gridgame  N/A  ⓘTags: Graph Theory gridgame  Dunjudge Archive  Batch  40 
fireandbeary  N/A  ⓘTags: Graph Theory fireandbeary  Dunjudge Archive (jamielim)  Batch  56 
workoutplan  N/A  ⓘTags: Greedy Workout plan  Bubble Cup 12 Div 1  Batch  65 
primesort  N/A  ⓘTags: Graph Theory, Math Prime Sort  Dunjudge Archive  Batch  35 
spiderweb  N/A  ⓘTags: Dynamic Programming, Graph Theory spiderweb  Dunjudge Archive  Batch  11 
cookieclickeralpha  N/A  ⓘTags: Math, Syntax cookieclickeralpha  Google Code Jam 2014  Batch  62 
boring  N/A  ⓘTags: Dynamic Programming boring  Dunjudge Archive  Batch  20 
area  N/A  ⓘTags: Syntax area  Dunjudge Archive  Batch  219 
solonim  N/A  ⓘTags: Math, Syntax Solo Nim  Dunjudge Archive  Batch  79 
sardines  N/A  ⓘTags: Data Structures, Dynamic Programming sardines  RI NOI Selection Test 2014  Batch  9 
deliveroo  N/A  ⓘTags: Data Structures, Greedy Deliveroo  RI November Course Stage 2 Selection Test 2021 (Deadeye)  Batch  27 
levelingup  N/A  ⓘTags: Dynamic Programming Leveling Up  RI November Course Stage 2 Selection Test 2021 (ryangohca)  Batch  60 
greenbeans  N/A  ⓘTags: Adhoc, Math, Syntax Green Beans Mayhem  RI November Course Stage 2 Selection Test 2021 (ryangohca, kym)  Batch  56 
coinjourney  N/A  ⓘTags: Binary Search Coin Journey  RI November Course Stage 2 Selection Test 2021 (kym)  Batch  74 
timeexam  N/A  ⓘTags: Math, Syntax What's the Time?  RI November Course Stage 2 Selection Test 2021 (ryangohca)  Batch  349 
duels  N/A  ⓘTags: Adhoc, Data Structures duels  Educational Round 9 (maomao90, jamessng)  Batch  13 
orangeroad  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window orangeroad  Educational Round 9 (jamessng, jamielim)  Batch  14 
portals  N/A  ⓘTags: Data Structures, Graph Theory portals  USACO 2021 US Open, Gold  Batch  10 
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  7 
spellofweakness  N/A  ⓘTags: Binary Search, Greedy, Line Sweep/Sliding Window Spell Of Weakness  Dunjudge Archive (dantoh)  Batch  78 
bananasmoothie  N/A  ⓘTags: Greedy Banana Smoothie  Dunjudge Archive (shenxy13)  Batch  118 
adjacentswaps  N/A  ⓘTags: Brute Force, Greedy Adjacent Swaps  Dunjudge Archive (shenxy13)  Batch  35 
jedan  N/A  ⓘTags: Dynamic Programming jedan  COCI 2012/2013  Batch  4 
stones  N/A  ⓘTags: Graph Theory, Trees stones  Dunjudge Archive  Batch  49 
hyperoperations  N/A  ⓘTags: Math hyperoperations  Dunjudge Archive  Batch  3 
pigeons  N/A  ⓘTags: Brute Force pigeons  Classic Problem  Batch  255 
diamond  N/A  ⓘTags: Syntax diamond  Classic Problem  Batch  272 
psle  N/A  ⓘTags: Syntax Old PSLE Grading System  Classic Problem  Batch  551 
3nplus1II  N/A  ⓘTags: Syntax 3nplus1II  Classic Problem  Batch  304 
3nplus1  N/A  ⓘTags: Syntax 3nplus1  Classic Problem  Batch  613 
rightangtri  N/A  ⓘTags: Syntax rightangtri  Classic Problem  Batch  471 
evenorodd  N/A  ⓘTags: Syntax evenorodd  Classic Problem  Batch  561 
boxhaskey  N/A  ⓘTags: Graph Theory Box Has Key  HCIRI 2020 May Contest (bensonlzl)  Batch  12 
rainbowroad  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory, Trees Rainbow Road  HCIRI 2020 May Contest (bensonlzl)  Batch  13 
pressstart  N/A  ⓘTags: Data Structures, Graph Theory Press Start!  HCIRI 2020 May Contest (bensonlzl)  Batch  10 
bracketsyndrome  N/A  ⓘTags: Adhoc, Data Structures Bracket Syndrome  RIHCI NOI Selection Test 2019  Batch  93 
destroy  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Destroy  RIHCI NOI Selection Test 2019  Batch  8 
wires  N/A  ⓘTags: Adhoc Wires  RIHCI NOI Selection Test 2019 (bensonlzl)  Interactive  17 
usefft4  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 4  Valentine's Day Contest 2022 (errorgorn)  Batch  2 
consistency  N/A  ⓘTags: Data Structures Consistency  RIHCI NOI Selection Test 2019 (bensonlzl)  Batch  2 
rainbowrabbit  N/A  ⓘTags: Adhoc, Greedy rainbowrabbit  RIHCI December Course Selection 2019 (bensonlzl)  Batch  39 
rabbitroad  N/A  ⓘTags: Binary Search, Graph Theory, Greedy, Trees RabbitRoad  RIHCI December Course Selection 2019 (bensonlzl)  Batch  11 
badtree  N/A  ⓘTags: Binary Search, Data Structures badtree  RIHCI December Course Selection 2019 (bensonlzl)  Batch  9 
orangecollector  N/A  ⓘTags: Bitmask, Data Structures, Dynamic Programming Orange Collector  RIHCI December Course Selection 2019 (rs)  Batch  13 
escalation  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees escalation  RIHCI December Course Selection 2019 (bensonlzl)  Batch  4 
circleselection  N/A  ⓘTags: Data Structures, Math Circle selection  APIO 2018  Batch  6 
duathlon  N/A  ⓘTags: Graph Theory, Trees Duathlon  APIO 2018  Batch  6 
f7  N/A  ⓘTags: Greedy F7  COCI 2012/2013  Batch  87 
forensic  N/A  ⓘTags: Brute Force, Graph Theory forensic  NOI 2012  Batch  3 
modsum  N/A  ⓘTags: Dynamic Programming, Math modsum  NOI 2012  Batch  37 
diesel  N/A  ⓘTags: Dynamic Programming, Graph Theory diesel  NOI 2013  Batch  3 
obelisk  N/A  ⓘTags: Graph Theory obelisk  NOI 2014  Batch  1 
cats  N/A  ⓘTags: Adhoc cats  NOI 2014  Batch  2 
island  N/A  ⓘTags: Graph Theory, Math, Trees Island  NOI 2018 Prelims  Batch  17 
snail  N/A  ⓘTags: Adhoc, Syntax Snail  NOI 2018 Prelims  Batch  33 
robot  N/A  ⓘTags: Data Structures Robots  Educational Round 8 (Goodbye oolimry) (oolimry)  Batch  10 
badnim3  N/A  ⓘTags: Bitmask, Explicitly Excluded (from IOI), Math Bad Nim 3 (EE)  Educational Round 8 (Goodbye oolimry) (errorgorn)  Batch  5 
monke  N/A  ⓘTags: Math Monke  Educational Round 8 (Goodbye oolimry) (errorgorn)  Batch  5 
badnim2  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Bad Nim 2 (EE)  Educational Round 8 (Goodbye oolimry) (errorgorn)  Batch  4 
mamamintaplusa  N/A  ⓘTags: Greedy mama MINta PLUSa  Educational Round 8 (Goodbye oolimry) (errorgorn)  Batch  17 
coolinteractive  N/A  ⓘTags: Adhoc Cool Interactive  Educational Round 8 (Goodbye oolimry) (errorgorn)  Interactive  8 
epicinteractive  N/A  ⓘTags: Adhoc, Information Theory, Math Epic Interactive  Educational Round 8 (Goodbye oolimry) (errorgorn, oolimry)  Interactive  3 
suffixarray  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Oolimry and Suffix Array  Codeforces Round 723 (zaneyu)  Batch  4 
killanton  N/A  ⓘTags: Brute Force, Greedy Kill Anton  Codeforces Round 723 (errorgorn)  Batch  6 
potionshard  N/A  ⓘTags: Greedy Potions (Hard Version)  Codeforces Round 723 (errorgorn, oolimry)  Batch  26 
potionseasy  N/A  ⓘTags: Dynamic Programming, Greedy Potions (Easy Version)  Codeforces Round 723 (errorgorn, oolimry)  Batch  27 
ihate1111  N/A  ⓘTags: Adhoc, Math I Hate 1111  Codeforces Round 723 (errorgorn)  Batch  52 
switchandflip  N/A  ⓘTags: Constructive Algorithms, Graph Theory, Math Switch and Flip  Codeforces Global Round 13 (errorgorn, oolimry)  Batch  1 
infinitezoo  N/A  ⓘTags: Bitmask, Graph Theory, Greedy, Math Zookeeper and The Infinite Zoo  Codeforces Global Round 13 (errorgorn)  Batch  6 
ruler  N/A  ⓘTags: Brute Force, Data Structures Ruler Of The Zoo  Educational Round 8 (Goodbye oolimry) (oolimry)  Batch  3 
pekora  N/A  ⓘTags: Greedy Pekora and Trampoline  Educational Round 8 (Goodbye oolimry) (oolimry)  Batch  10 
palindromicfizzbuzz  N/A  ⓘTags: Syntax Palindromic FizzBuzz  NOI 2019 Prelims  Batch  132 
lostarray  N/A  ⓘTags: Adhoc, Constructive Algorithms Lost Array  NOI 2019 Prelims  Batch  78 
squarerect  N/A  ⓘTags: Adhoc, Information Theory Square or Rectangle?  NOI 2019 Prelims  Interactive  9 
virus  N/A  ⓘTags: Adhoc, Graph Theory, Line Sweep/Sliding Window virus  JOISC 2017, Day 1  Batch  1 
mirrortree  N/A  ⓘTags: Graph Theory, Trees mirrortree  BOI 2011, Day 2  Batch  3 
airline  N/A  ⓘTags: Graph Theory, Information Theory airline  JOISC 2018, Day 3  Communication  9 
dungeons2  N/A  ⓘTags: Binary Search, Data Structures dungeons2  AGM 2021, Final Round, Day 2  Batch  4 
sillysort  N/A  ⓘTags: Math sillysort  info(1) cup 2019 (modified) (errorgorn)  Batch  5 
trivialmaths2  N/A  ⓘTags: Explicitly Excluded (from IOI), Math trivialmaths2 (EE)  Educational Round 7 (errorgorn)  Batch  5 
oridance  N/A  ⓘTags: Dynamic Programming Orientation Dance  Codeforces 1509C  Batch  59 
addone  N/A  ⓘTags: Dynamic Programming Add One  Codeforces 1513C  Batch  29 
switches  N/A  ⓘTags: Explicitly Excluded (from IOI), Math switches  Educational Round 7 (myrcella, errorgorn)  Batch  4 
bosubaiko  N/A  ⓘTags: Adhoc, Greedy Bosu Baiko  Educational Round 6 (errorgorn)  Batch  28 
robobear  N/A  ⓘTags: Graph Theory The Maze of RoboBear  Tuymaada 2021  Batch  17 
findandprevent  N/A  ⓘTags: Graph Theory, Trees Find and Prevent  Tuymaada 2021  Batch  17 
judgeantibreaker  N/A  ⓘTags: Binary Search, Square Root Decomposition judgeantibreaker  Educational Round 6 (oolimry)  Batch  8 
fourbuckets  N/A  ⓘTags: Adhoc, Math Four Buckets  Educational Round 6 (oolimry)  Batch  23 
persistentlists  N/A  ⓘTags: Binary Search, Data Structures, Square Root Decomposition Persistent Lists  Educational Round 6 (oolimry)  Batch  5 
hellokitty  N/A  ⓘTags: Binary Search, Data Structures, Math hellokitty  Dunjudge Archive  Batch  23 
cudak  N/A  ⓘTags: Binary Search, Dynamic Programming cudak  COCI 2007/2008  Batch  29 
routes  N/A  ⓘTags: Adhoc, Graph Theory routes  Dunjudge Archive  Batch  14 
quality  N/A  ⓘTags: Binary Search, Dynamic Programming Quality of Living  IOI 2010  Interactive  4 
flooding  N/A  ⓘTags: Graph Theory flooding  Dunjudge Archive  Batch  7 
burger  N/A  ⓘTags: Greedy burger  Code Jam to I/O 2018 for Women  Batch  17 
toblerone  N/A  ⓘTags: Brute Force, Dynamic Programming, Greedy toblerone  HCI Mock NOI 2015  Batch  10 
twomeals  N/A  ⓘTags: Brute Force, Dynamic Programming, Greedy twomeals  Dunjudge Archive  Batch  124 
badnim  N/A  ⓘTags: Explicitly Excluded (from IOI), Math badnim  Educational Round 7 (errorgorn)  Batch  35 
pancake  N/A  ⓘTags: Brute Force, Graph Theory pancake  NOI 2012  Batch  18 
switches2  N/A  ⓘTags: Dynamic Programming, Math switches2  Educational Round 7 (errorgorn)  Batch  6 
switches998244353  N/A  ⓘTags: Explicitly Excluded (from IOI), Math switches998244353 (EE)  Educational Round 7 (errorgorn)  Batch  3 
cashmoney  N/A  ⓘTags: Math Cash Money  2020 CNY  Batch  12 
parade  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees parade  Dunjudge Archive  Batch  31 
productcounting  N/A  ⓘTags: Divide and Conquer, Square Root Decomposition Product Counting  Educational Round 5 (errorgorn)  Batch  5 
lottery  N/A  ⓘTags: Adhoc Lottery  CEOI 2018  Batch  2 
cloudcomputing  N/A  ⓘTags: Dynamic Programming Cloud computing  CEOI 2018  Batch  13 
mandarins  N/A  ⓘTags: Math Mandarins  2020 CNY  Batch  56 
friendcross  N/A  ⓘTags: Data Structures friendcross  USACO 2017 Feb Plat  Batch  2 
supplies  N/A  ⓘTags: Graph Theory supplies  Dunjudge Archive  Batch  68 
knightmoves  N/A  ⓘTags: Graph Theory knightmoves  Dunjudge Archive  Batch  88 
mining  N/A  ⓘTags: Graph Theory mining  Dunjudge Archive  Batch  20 
erp  N/A  ⓘTags: Graph Theory erp  Dunjudge Archive  Batch  56 
heatwv  N/A  ⓘTags: Graph Theory Heat Wave  Dunjudge Archive  Batch  78 
party  N/A  ⓘTags: Data Structures, Graph Theory party  Dunjudge Archive  Batch  129 
marathon_usaco  N/A  ⓘTags: Data Structures Marathon  USACO 2014 Dec, Gold  Batch  4 
schedule  N/A  ⓘTags: Dynamic Programming, Graph Theory schedule  HCI NOI Selection Test 2014  Batch  11 
streets  N/A  ⓘTags: Data Structures, Graph Theory, Trees OneWay Streets  CEOI 2017  Batch  5 
friend  N/A  ⓘTags: Adhoc friend  IOI 2014  Interactive  4 
tournament  N/A  ⓘTags: Graph Theory, Trees tournament  IOI 2012  Interactive  5 
registers  N/A  ⓘTags: Bitmask, Constructive Algorithms Bit Shift Registers  IOI 2021  Interactive  2 
dungeons  N/A  ⓘTags: Graph Theory Dungeons Game  IOI 2021  Interactive  2 
dna_ioi  N/A  ⓘTags: Adhoc Mutating DNA  IOI 2021  Interactive  44 
candies_ioi  N/A  ⓘTags: Data Structures Distributing Candies  IOI 2021  Interactive  6 
parks  N/A  ⓘTags: Adhoc, Constructive Algorithms, Graph Theory Fountain Parks  IOI 2021  Interactive  3 
keys  N/A  ⓘTags: Graph Theory, Trees Keys  IOI 2021  Interactive  5 
graphoverflow  N/A  ⓘTags: Graph Theory, Math graphoverflow  RI Deccourse 2018 Selection Test (jerryhanjt)  Batch  4 
divsum_dec18  N/A  ⓘTags: Math Divsum  RI Deccourse 2018 Selection Test (eutroph)  Batch  13 
askonegetonefree  N/A  ⓘTags: Dynamic Programming AskOneGetOneFree  NOI 2015  Interactive  9 
elephants  N/A  ⓘTags: Binary Search, Square Root Decomposition Elephants  IOI 2011  Interactive  4 
newhome  N/A  ⓘTags: Divide and Conquer, Slope Trick New Home  APIO 2018  Batch  5 
bridge_cerc  N/A  ⓘTags: Graph Theory, Square Root Decomposition Bridge  CERC 2018  Batch  3 
ponteng  N/A  ⓘTags: Math, Square Root Decomposition Ponteng  2019 IOI Problem Setter Contest  Batch  6 
mobitel  N/A  ⓘTags: Dynamic Programming, Square Root Decomposition Mobitel  COCI 2018/2019  Batch  8 
historical  N/A  ⓘTags: Square Root Decomposition Historical  JOI 2013/2014  Batch  15 
mathtree  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Math Tree  SGP Sparring 2021 (lovemathboy)  Batch  27 
seedflare  N/A  ⓘTags: Information Theory Seed Flare  SGP Sparring 2021 (lovemathboy)  Interactive  14 
seabreakpath  N/A  ⓘTags: Data Structures Seabreak Path  SGP Sparring 2021 (lovemathboy)  Batch  2 
sonya  N/A  ⓘTags: Dynamic Programming, Slope Trick Sonya and Problem Wihtout A Legend  Codeforces 713C  Batch  20 
minimum  N/A  ⓘTags: Syntax minimum  Classic Problem  Interactive  371 
indivisibility  N/A  ⓘTags: Math indivisibility  Dunjudge Archive  Batch  32 
thanossort_st4  N/A  ⓘTags: Adhoc, Divide and Conquer, Explicitly Excluded (from IOI) thanossort_st4  RSA Fun Contest (errorgorn)  Interactive  8 
thanossort  N/A  ⓘTags: Adhoc, Divide and Conquer thanossort  RSA Fun Contest (errorgorn)  Interactive  10 
fireworks  N/A  ⓘTags: Dynamic Programming, Graph Theory, Slope Trick, Trees Fireworks  APIO 2016  Batch  11 
warp  N/A  ⓘTags: Bitmask, Dynamic Programming warp  HCI NOI Selection Retest 2020 (bensonlzl)  Batch  36 
skyline  N/A  ⓘTags: Graph Theory, Greedy skyline  HCI NOI Selection Retest 2020 (bensonlzl)  Batch  37 
colourblind  N/A  ⓘTags: Graph Theory colourblind  HCI NOI Selection Retest 2020 (bensonlzl)  Interactive  12 
meetings  N/A  ⓘTags: Data Structures, Divide and Conquer Meetings  IOI 2018  Interactive  3 
doll  N/A  ⓘTags: Adhoc, Constructive Algorithms Mechanical Doll  IOI 2018  Interactive  7 
highway  N/A  ⓘTags: Binary Search, Information Theory Highway Tolls  IOI 2018  Interactive  3 
race  N/A  ⓘTags: Divide and Conquer, Trees Race  IOI 2011  Interactive  24 
mushrooms  N/A  ⓘTags: Constructive Algorithms, Information Theory Counting Mushrooms  IOI 2020 (Day 2)  Interactive  3 
promotion  N/A  ⓘTags: Data Structures, Graph Theory, Trees Promotion Counting  USACO 2017 Jan, Platinum  Batch  27 
rabbitbridges  N/A  ⓘTags: Binary Search, Graph Theory Rabbit Bridges  Educational Round 5 (oolimry)  Batch  12 
powersupply  N/A  ⓘTags: Adhoc, Data Structures, Line Sweep/Sliding Window, Math Power Supply  Educational Round 5 (cstuart)  Batch  3 
lfs  N/A  ⓘTags: Dynamic Programming, Math Longest Factor Subsequence  Educational Round 5 (errorgorn)  Batch  34 
funfair  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Funfair  Educational Round 5 (rs)  Batch  18 
supertrees  N/A  ⓘTags: Adhoc, Constructive Algorithms, Graph Theory Connecting Supertrees  IOI 2020  Interactive  14 
plants  N/A  ⓘTags: Binary Search, Data Structures Comparing Plants  IOI 2020  Interactive  3 
midas  N/A  ⓘTags: Graph Theory, Trees Midas  POI 2017 Round 3 Day 1 Q1  Batch  12 
molecules  N/A  ⓘTags: Adhoc, Line Sweep/Sliding Window Detecting Molecules  IOI 2016  Interactive  14 
flood  N/A  ⓘTags: Graph Theory, Math Flood  POI 2018 Round 1 Q3  Batch  10 
container  N/A  ⓘTags: Square Root Decomposition Shipping Containers  POI 2017 Round 2 Day 2 Q1  Batch  27 
threetowers  N/A  ⓘTags: Brute Force, Greedy threetowers  POI 2015 Round 2 Day 2 Q2  Batch  10 
wombats  N/A  ⓘTags: Data Structures wombats  IOI 2013  Interactive  3 
dreaming  N/A  ⓘTags: Graph Theory dreaming  IOI 2013  Interactive  14 
animaleditor  N/A  ⓘTags: Data Structures animaleditor  MCO  Batch  8 
cave  N/A  ⓘTags: Binary Search cave  IOI 2013  Interactive  23 
leastround  N/A  ⓘTags: Dynamic Programming leastround  Codeforces 2B  Batch  7 
garden_ioi05  N/A  ⓘTags: Brute Force, Dynamic Programming Garden  IOI 2005  Batch  12 
garden_ioi08  N/A  ⓘTags: Dynamic Programming Linear Garden  IOI 2008  Batch  10 
umbrella  N/A  ⓘTags: Dynamic Programming umbrella  USACO Silver Dec 2011  Batch  17 
robots  N/A  ⓘTags: Binary Search, Greedy robots  IOI 2013  Interactive  16 
fruits  N/A  ⓘTags: Data Structures, Greedy fruits  Dunjudge Archive  Batch  30 
tourist  N/A  ⓘTags: Data Structures, Greedy tourist  IOI 2012 Practice Tasks  Batch  35 
convexhull  N/A  ⓘTags: Data Structures Convex Hull  Classic Problem (ryangohca)  Batch  42 
roads  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Road Closures  APIO 2021  Interactive  9 
collectingstamps3  N/A  ⓘTags: Dynamic Programming collectingstamps3  JOI 2020 Final Round  Batch  4 
jjooii2  N/A  ⓘTags: Adhoc jjooii2  JOI 2020 Final Round  Batch  11 
infiniteseq  N/A  ⓘTags: Dynamic Programming infiniteseq  AtCoder Regular Contest 071  Batch  4 
tents  N/A  ⓘTags: Dynamic Programming Tents  JOI 2017/2018 Spring Camp  Batch  4 
changingcolours  N/A  ⓘTags: Data Structures, Dynamic Programming changingcolours  RI Problem Setter Contest 2019 (rs)  Batch  4 
orlando  N/A  ⓘTags: Bitmask, Data Structures, Dynamic Programming, Graph Theory, Trees orlando  RI Problem Setter Contest 2019 (zhuan, 0rang3)  Batch  3 
birthday  N/A  ⓘTags: Explicitly Excluded (from IOI), Math birthday  RI Problem Setter Contest 2019 (syy)  Batch  4 
marathon  N/A  ⓘTags: Dynamic Programming, Graph Theory marathon  RI Problem Setter Contest 2019 (Ziwyy)  Batch  3 
rabbitplane  N/A  ⓘTags: Binary Search, Greedy rabbitplane  RI Problem Setter Contest 2019 (bensonlzl)  Batch  7 
lineup2  N/A  ⓘTags: Syntax Lineup  RI Problem Setter Contest 2019 (rs)  Batch  46 
kickingshoes  N/A  ⓘTags: Data Structures, Greedy, Math Kicking Shoes  Educational Round 4 (maomao90)  Batch  14 
7up  N/A  ⓘTags: Syntax 7up  RI November Course Stage 2 Selection Test 2019  Batch  92 
scrivener  N/A  ⓘTags: Data Structures Crayfish scrivener  IOI 2012  Interactive  11 
cousin  N/A  ⓘTags: Graph Theory, Trees cousin  Dunjudge Archive  Interactive  12 
candyshop  N/A  ⓘTags: Data Structures candyshop  Classic Problem  Batch  33 
construction  N/A  ⓘTags: Graph Theory, Trees Construction of Highway  JOI 2017/2018 Spring Camp  Batch  6 
jumps  N/A  ⓘTags: Data Structures, Greedy Rainforest Jumps  APIO 2021 (bensonlzl)  Interactive  17 
hexagon  N/A  ⓘTags: Graph Theory, Math Hexagonal Territory  APIO 2021  Interactive  1 
count1graphs  N/A  ⓘTags: Math Count 1 Graphs  Educational Round 4 (maomao90, errorgorn)  Batch  3 
gwynethandtree  N/A  ⓘTags: Divide and Conquer, Graph Theory, Trees Gwyneth and Tree  Codeforces 342E  Batch  32 
chemistry  N/A  ⓘTags: Dynamic Programming, Joke chemistry  April Fools Contest 2020 (0rang3)  Batch  5 
wormholes  N/A  ⓘTags: Dynamic Programming wormholes  Dunjudge Archive  Batch  95 
istj  N/A  ⓘTags: Data Structures, Trees ISTJ  2020 CNY, Classic Problem (0rang3, shenxy13)  Batch  11 
bookshelf  N/A  ⓘTags: Data Structures bookshelf  Dunjudge Archive  Batch  46 
bombing  N/A  ⓘTags: Graph Theory bombing  Dunjudge Archive  Batch  19 
atm  N/A  ⓘTags: Graph Theory The Great ATM Robbery  APIO 2009  Batch  19 
mice  N/A  ⓘTags: Graph Theory mice  Dunjudge Archive  Batch  17 
bombing2  N/A  ⓘTags: Graph Theory bombing2  Dunjudge Archive  Batch  18 
sailor  N/A  ⓘTags: Graph Theory sailor  CPSPC 2010  Batch  21 
doodles  N/A  ⓘTags: Graph Theory, Math doodles  December Course 2019 Advanced Final Contest (rs)  Batch  5 
clockpalindrome  N/A  ⓘTags: Adhoc, Dynamic Programming clockpalindrome  December Course 2019 Advanced Final Contest  Batch  7 
hdb  N/A  ⓘTags: Data Structures, Dynamic Programming hdb  Dunjudge Archive  Batch  19 
skyscraper_apio15  N/A  ⓘTags: Graph Theory, Square Root Decomposition Jakarta Skyscrapers  APIO 2015  Batch  11 
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 
edgeflip  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Edge Flipping  Educational Round 4 (jamessng)  Batch  12 
bubblesort  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Bubble Sort  Educational Round 4 (jamessng, zaneyu, oolimry)  Batch  14 
boarding  N/A  ⓘTags: Graph Theory boarding  NUSH ISC 2018  Batch  2 
chess  N/A  ⓘTags: Adhoc, Bitmask, Data Structures chess  NUSH ISC 2018  Batch  4 
bananaland  N/A  ⓘTags: Dynamic Programming bananaland  NUSH ISC 2018  Batch  3 
strangedevice  N/A  ⓘTags: Data Structures, Math Strange Device  APIO 2019  Batch  12 
sandd  N/A  ⓘTags: Binary Search sandd  Classic Problem  Interactive  109 
mugger  N/A  ⓘTags: Dynamic Programming mugger  RI Problem Setter Contest 2019 (ngmh)  Batch  32 
bridges_apio19  N/A  ⓘTags: Graph Theory, Square Root Decomposition Bridges  APIO 2019  Batch  11 
badknapsack  N/A  ⓘTags: Brute Force, Dynamic Programming badknapsack  Educational Round 3 (errorgorn)  Batch  15 
inversemax  N/A  ⓘTags: Bitmask, Dynamic Programming inversemax  Educational Round 3 (errorgorn)  Batch  24 
cheaters  N/A  ⓘTags: Explicitly Excluded (from IOI), Math cheaters  Educational Round 3 (errorgorn)  Batch  6 
fencing3  N/A  ⓘTags: Data Structures, Square Root Decomposition fencing3  Educational Round 3 (errorgorn, tqbfjotld)  Batch  4 
catalansum  N/A  ⓘTags: Explicitly Excluded (from IOI), Math catalansum (EE)  Educational Round 3 (errorgorn, oolimry)  Batch  10 
cardgame2  N/A  ⓘTags: Dynamic Programming cardgame2  Dunjudge Archive  Batch  7 
cardgame  N/A  ⓘTags: Data Structures, Dynamic Programming cardgame  Dunjudge Archive  Batch  3 
primepie  N/A  ⓘTags: Math primepie  Dunjudge Archive  Interactive  40 
orchard2  N/A  ⓘTags: Dynamic Programming orchard2  RI NOI Selection Test 2015  Batch  12 
hacker  N/A  ⓘTags: Data Structures, Greedy, Line Sweep/Sliding Window hacker  BOI 2015  Batch  12 
sawmills  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Two Sawmills  CEOI 2004  Batch  11 
scanner  N/A  ⓘTags: Dynamic Programming scanner  Dunjudge Archive  Batch  37 
jumping2  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Jumping  Dunjudge Archive  Batch  22 
ballot  N/A  ⓘTags: Data Structures ballot  Dunjudge Archive  Batch  92 
UCFJ  N/A  ⓘTags: Data Structures UCFJ  USACO 2021 US Open, Platinum  Batch  2 
corporate  N/A  ⓘTags: Data Structures, Divide and Conquer Corporate  IOI 2020 Practice Session  Batch  5 
sequence_apio  N/A  ⓘTags: Dynamic Programming Split the sequence  APIO 2014  Batch  22 
sort  N/A  ⓘTags: Adhoc sort  Classic Problem?  Batch  91 
aliens  N/A  ⓘTags: Data Structures aliens  Dunjudge Archive  Batch  16 
GSS  N/A  ⓘTags: Greedy GSS  Dunjudge Archive  Batch  200 
scalars  N/A  ⓘTags: Greedy scalars  Dunjudge Archive  Batch  126 
chinese  N/A  ⓘTags: Syntax chinese  Dunjudge Archive  Batch  79 
potatosalad  N/A  ⓘTags: Greedy potatosalad  Classic Problem  Batch  397 
skillmoves  N/A  ⓘTags: Data Structures, Greedy skillmoves  RI November Course Stage 2 Selection Test 2019  Batch  46 
cuberoot  N/A  ⓘTags: Binary Search, Math, Syntax cuberoot  Classic Problem  Batch  296 
sudoku  N/A  ⓘTags: Constructive Algorithms, Greedy sudoku  NOI 2015  Batch  5 
shuffle  N/A  ⓘTags: Constructive Algorithms, Graph Theory shuffle  NOI 2019  Interactive  3 
citymapping  N/A  ⓘTags: Constructive Algorithms, Graph Theory, Information Theory, Trees CityMapping  NOI 2018  Interactive  7 
lampposts  N/A  ⓘTags: Binary Search lampposts  Dunjudge Archive  Interactive  20 
cards  N/A  ⓘTags: Data Structures cards  Dunjudge Archive  Batch  10 
chunlian  N/A  ⓘTags: Data Structures chunlian  Dunjudge Archive  Batch  26 
1402  N/A  ⓘTags: Adhoc, Joke 1402  April Fools' 2021 (bensonlzl)  Batch  42 
aliens_ioi  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming Aliens  IOI 2016  Interactive  8 
countedges  N/A  ⓘTags: Dynamic Programming, Graph Theory, Math Counting Edges  USACO 2021 February Contest, Platinum  Batch  1 
minedges  N/A  ⓘTags: Graph Theory Minimizing Edges  USACO 2021 February Contest, Platinum  Batch  1 
notimetodry  N/A  ⓘTags: Data Structures, Square Root Decomposition No Time to Dry  USACO 2021 February Contest, Platinum  Batch  3 
escapesadland  N/A  ⓘTags: Binary Search, Graph Theory Escape Sadland  Dunjudge Archive  Batch  3 
snack  N/A  ⓘTags: Dynamic Programming, Greedy snack  Dunjudge Archive  Batch  160 
stepgame  N/A  ⓘTags: Dynamic Programming, Greedy stepgame  Classic Problem  Batch  189 
badpotato  N/A  ⓘTags: Dynamic Programming badpotato  Dunjudge Archive  Batch  104 
malcolm  N/A  ⓘTags: Line Sweep/Sliding Window malcolm  COCI 2012/2013  Batch  33 
squidzofrenzic  N/A  ⓘTags: Binary Search squidzofrenzic  Dunjudge Archive  Batch  171 
restaurant  N/A  ⓘTags: Greedy restaurant  Dunjudge Archive  Batch  38 
carpark  N/A  ⓘTags: Greedy carpark  Dunjudge Archive  Batch  140 
explosion  N/A  ⓘTags: Math explosion  Classic Problem  Batch  96 
countalp  N/A  ⓘTags: Syntax countalp  Classic Problem  Batch  157 
pigeonhole  N/A  ⓘTags: Data Structures pigeonhole  Dunjudge Archive  Batch  93 
uniquenumbers  N/A  ⓘTags: Data Structures uniquenumbers  Classic Problem  Batch  259 
reflection  N/A  ⓘTags: Constructive Algorithms, Math reflection  RIHCI NOI Selection Test 2020 (eutroph)  Batch  1 
solarstorm  N/A  ⓘTags: Graph Theory, Line Sweep/Sliding Window, Trees Solar Storm  NOI 2020 Prelims  Batch  16 
harbingers  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees harbingers  CEOI 2009  Batch  7 
gizmoguy  N/A  ⓘTags: Slope Trick Gizmo Guy  IOI 2020 Practice Session  Batch  4 
housevisit  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees housevisit  CNY Contest 2019 (bensonlzl)  Batch  21 
1821  N/A  ⓘTags: Constructive Algorithms, Graph Theory, Joke, Trees 1821  April Fools' 2021 (zaneyu)  Batch  100 
0405  N/A  ⓘTags: Joke, Math 0405  April Fools' 2021 (zaneyu)  Batch  66 
1503  N/A  ⓘTags: Adhoc, Joke 1503  April Fools' 2021 (jamielim)  Batch  48 
pond  N/A  ⓘTags: Data Structures, Dynamic Programming pond  NOI 2021 Finals  Batch  1 
archaeologist  N/A  ⓘTags: Adhoc archaeologist  NOI 2021 Finals  Interactive  13 
tiles  N/A  ⓘTags: Bitmask, Data Structures, Dynamic Programming tiles  NOI 2021 Finals  Batch  21 
fraud  N/A  ⓘTags: Adhoc, Math fraud  NOI 2021 Finals  Batch  68 
password  N/A  ⓘTags: Data Structures, Dynamic Programming, Greedy, Slope Trick password  NOI 2021 Finals  Batch  28 
1609  N/A  ⓘTags: Joke 1609  April Fools' 2021 (0rang3)  Batch  165 
colorgraph  N/A  ⓘTags: Graph Theory colorgraph  uwu (errorgorn)  Batch  16 
latex  N/A  ⓘTags: Data Structures, Dynamic Programming latex  RI Deccourse 2018 Selection Test  Batch  5 
acorns  N/A  ⓘTags: Data Structures acorns  MCO 2016  Batch  14 
lppfnlcst2  N/A  ⓘTags: Data Structures Lazy Propogation Persistant Fat Nodes Li Chao Segment Tree 2  Classic Problem (errorgorn)  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  5 
mememagic  N/A  ⓘTags: Dynamic Programming mememagic  Dunjudge Archive  Batch  17 
train_ex  N/A  ⓘTags: Dynamic Programming train_ex  Dunjudge Archive  Batch  32 
train  N/A  ⓘTags: Dynamic Programming train  Dunjudge archive  Batch  75 
commando  N/A  ⓘTags: Dynamic Programming commando  APIO 2010  Batch  62 
foolpruf  N/A  ⓘTags: Data Structures, Graph Theory, Greedy Foolprüf Security  NERC 2019  Batch  3 
supperbox  N/A  ⓘTags: Divide and Conquer, Dynamic Programming Estelle’s Supper Box  RIHCI NOI Selection Test 2018  Batch  24 
catgameshow  N/A  ⓘTags: Data Structures catgameshow  RI/RJC NOI Selection Test 2016  Batch  12 
guards  N/A  ⓘTags: Divide and Conquer, Dynamic Programming Guards  Dunjudge archive  Batch  44 
truck  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Math, Trees truck  NOI 2021 Qualification  Batch  16 
departure  N/A  ⓘTags: Data Structures, Greedy departure  NOI 2021 Qualification  Batch  13 
competition  N/A  ⓘTags: Greedy competition  NOI 2021 Qualification  Batch  188 
presents  N/A  ⓘTags: Explicitly Excluded (from IOI), Math presents (EE)  Valentines Contest 2021 (maomao90)  Batch  2 
bracketcount  N/A  ⓘTags: Dynamic Programming, Explicitly Excluded (from IOI) bracketcount  Valentines Contest 2021 (errorgorn)  Batch  3 
dahliahostels  N/A  ⓘTags: Dynamic Programming, Math dahliahostels  Valentines Contest 2021 (errorgorn)  Batch  3 
ducknuggetconvention  N/A  ⓘTags: Data Structures, Divide and Conquer Duck Nugget Convention  Valentines Contest 2021 (oolimry)  Batch  27 
trivialmaths  N/A  ⓘTags: Explicitly Excluded (from IOI), Math trivialmaths  Valentines Contest 2021 (errorgorn)  Interactive  8 
catteams  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming catteams  RI/RJC NOI Selection Test 2016  Batch  15 
rarsum  N/A  ⓘTags: Dynamic Programming rarsum  Raffles Cat Helping Contest 2013  Batch  25 
rarwall  N/A  ⓘTags: Data Structures rarwall  Dunjudge Archive  Interactive  10 
troubles  N/A  ⓘTags: Adhoc, Data Structures, Dynamic Programming troubles  Dunjudge Archive  Batch  29 
snakesnack2  N/A  ⓘTags: Line Sweep/Sliding Window snakesnack2  RIHCINUSH NOI Selection Test 2021 (errorgorn)  Batch  32 
rebuild  N/A  ⓘTags: Constructive Algorithms, Graph Theory, Greedy rebuild  RIHCINUSH NOI Selection Test 2021 (shenxy13)  Interactive  16 
fertile  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming fertile  RIHCINUSH NOI Selection Test 2021 (errorgorn)  Batch  17 
bunnyscore  N/A  ⓘTags: Adhoc, Data Structures bunnyscore  RIHCINUSH NOI Selection Test 2021 (errorgorn)  Interactive  29 
armpit  N/A  ⓘTags: Adhoc armpit  RIHCINUSH NOI Selection Test 2021 (errorgorn)  Batch  35 
construct  N/A  ⓘTags: Dynamic Programming, Graph Theory Constructing Birthday Presents  RIHCINUSH NOI Selection Test 2021 (0rang3)  Batch  55 
bucketstacking  N/A  ⓘTags: Adhoc, Greedy Bucket Stacking  RIHCINUSH NOI Selection Test 2021 (oolimry)  Batch  23 
swimming  N/A  ⓘTags: Graph Theory Constructing a Swimming Pool  RIHCINUSH NOI Selection Test 2021 (0rang3)  Batch  34 
wabbit  N/A  ⓘTags: Greedy wabbit  RIHCINUSH NOI Selection Test 2021 (oolimry)  Batch  85 
fencing  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window, Square Root Decomposition fencing  RIHCINUSH NOI Selection Test 2021 (errorgorn)  Batch  22 
magick  N/A  ⓘTags: Adhoc, Information Theory, Math Magick  RIHCI NOI Selection Test 2019  Communication  11 
combo  N/A  ⓘTags: Adhoc Combo  IOI 2018  Interactive  25 
werewolf  N/A  ⓘTags: Data Structures, Graph Theory, Trees Werewolf  IOI 2018  Interactive  10 
nian  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Nian  2020 CNY (oolimry)  Batch  17 
summarising2020  N/A  ⓘTags: Information Theory, Joke Summarising 2020  Hello 2021 (shenxy13)  Interactive  59 
hashcollision  N/A  ⓘTags: Joke Hash Collision  Hello 2021 (shenxy13)  Interactive  99 
samelength  N/A  ⓘTags: Joke Same Length  Hello 2021 (errorgorn)  Batch  57 
holdinghands  N/A  ⓘTags: Graph Theory, Trees holdinghands  Dec Course 2020 BAPS (jiahng)  Batch  9 
quillvsowl  N/A  ⓘTags: Adhoc, Line Sweep/Sliding Window Quill Vs Owl  Dec Course 2020 BAPS (jamielim)  Batch  51 
dna  N/A  ⓘTags: Dynamic Programming DNA  APIO 2008  Batch  22 
girlfriend  N/A  ⓘTags: Dynamic Programming, Graph Theory girlfriend  Dunjudge Archive  Batch  34 
tour  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory tour  NOI 2011  Batch  27 
variety  N/A  ⓘTags: Dynamic Programming variety  RI November Course Stage 2 Selection Test 2019  Batch  56 
appletree  N/A  ⓘTags: Graph Theory appletree  Dunjudge Archive  Batch  27 
bananafever  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees bananafever  Dunjudge Archive  Batch  23 
delivery  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory delivery  Dunjudge Archive  Batch  14 
graphcraft  N/A  ⓘTags: Graph Theory graphcraft  Dunjudge Archive  Interactive  56 
numbers  N/A  ⓘTags: Dynamic Programming PalindromeFree Numbers  BOI 2013  Batch  47 
assembly  N/A  ⓘTags: Dynamic Programming assembly  Dunjudge Archive  Batch  83 
lazycat  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory lazycat  Dunjudge Archive  Batch  34 
makemst  N/A  ⓘTags: Graph Theory, Math makemst  Codeforces 1088F  Batch  9 
haiku  N/A  ⓘTags: Dynamic Programming Iroha and Haiku  AtCoder  Batch  8 
padoru  N/A  ⓘTags: Graph Theory Hashire Sori Yo!  Dec Course 2020 BAPS (peaceknight05)  Batch  55 
bracketflip  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window, Math bracketflip  Dec Course 2020 BAPS (pavement)  Batch  12 
split  N/A  ⓘTags: Constructive Algorithms, Graph Theory, Trees Split the Attractions  IOI 2019 (Day 1)  Interactive  4 
village  N/A  ⓘTags: Graph Theory, Greedy, Trees village  BOI 2020  Batch  17 
monochromecat  N/A  ⓘTags: Graph Theory, Trees monochromecat  ARC 097  Batch  15 
invasion  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Line Sweep/Sliding Window, Trees invasion  Dunjudge Archive  Batch  11 
multipaths  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Multiple Paths  Dunjudge Archive  Batch  26 
oranges2  N/A  ⓘTags: Graph Theory, Trees oranges2  RI Deccourse 2018 Selection Test (0rang3)  Batch  102 
railway  N/A  ⓘTags: Graph Theory, Trees railway  CPSPC 2004  Batch  71 
ancestor  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees ancestor  Classic problem  Batch  125 
employee  N/A  ⓘTags: Graph Theory, Trees employee  Dunjudge Archive  Batch  66 
countingagain  N/A  ⓘTags: Dynamic Programming, Math Counting Again  ARC 104D  Batch  21 
localexpress  N/A  ⓘTags: Dynamic Programming localexpress  AtCoder Typical DP Contest  Batch  70 
towers  N/A  ⓘTags: Data Structures, Dynamic Programming towers  Codeforces 474E  Batch  52 
snowcow  N/A  ⓘTags: Data Structures, Graph Theory, Trees Snowcow  USACO 2019 December Contest Platinum  Batch  25 
guessarray  N/A  ⓘTags: Adhoc 4sadfaces Guessing an Array  Dec Course 2020 BAPS (zaneyu)  Interactive  24 
ants  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees ants  Dunjudge Archive  Interactive  25 
smurfpaths  N/A  ⓘTags: Data Structures, Graph Theory, Trees smurfpaths  RIHCI NOI Selection Test 2020 (rs)  Batch  69 
payraise  N/A  ⓘTags: Graph Theory payraise  Dunjudge Archive  Batch  102 
selectingintervals  N/A  ⓘTags: Binary Search, Dynamic Programming selectingintervals  Codeforces 1055E  Batch  22 
globalwarming_ceoi  N/A  ⓘTags: Data Structures, Dynamic Programming Global warming  CEOI 2018  Batch  18 
orchard  N/A  ⓘTags: Dynamic Programming, Line Sweep/Sliding Window orchard  NOI 2014  Batch  70 
installingapps  N/A  ⓘTags: Dynamic Programming, Greedy Installing Apps  NWERC 2017  Batch  23 
christmaswall  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Christmas Wall  Educational Round 2 (maomao90)  Batch  6 
duckduckgo  N/A  ⓘTags: Greedy duckduckgo  Codeforces 1091F  Batch  28 
visitingsingapore  N/A  ⓘTags: Dynamic Programming Visiting Singapore  NOI 2020 Prelims  Batch  15 
llis  N/A  ⓘTags: Dynamic Programming Longest LIS  NUSH NOI Selection Test 2018  Batch  35 
election  N/A  ⓘTags: Data Structures, Dynamic Programming election  Dunjudge Archive  Batch  33 
modules  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming, Line Sweep/Sliding Window modules  NUSH NOI Selection Test 2018  Batch  27 
4russians  N/A  ⓘTags: Dynamic Programming 4russians  RIHCI NOI Selection Test 2020 (jamielim)  Batch  85 
nis  N/A  ⓘTags: Data Structures, Dynamic Programming nis  Dunjudge Archive  Batch  68 
stamps  N/A  ⓘTags: Dynamic Programming stamps  Dunjudge Archive  Batch  62 
assignpaths  N/A  ⓘTags: Binary Search, Graph Theory, Greedy, Trees assignpaths  USACO 2020 February Contest, Platinum  Batch  26 
manycolours  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees manycolours  ABC 133  Batch  41 
merchant_o  N/A  ⓘTags: Dynamic Programming, Slope Trick Merchant Otter  Dec Course 2020 BAPS (myrcella)  Batch  25 
arrayproblem  N/A  ⓘTags: Greedy arrayproblem  Codeforces  Batch  95 
cheerleaders  N/A  ⓘTags: Dynamic Programming cheerleaders  Atcoder Educational DP Contest  Batch  45 
snakesnack  N/A  ⓘTags: Dynamic Programming, Greedy snakesnack  Codeforces 1239E  Batch  18 
neckties  N/A  ⓘTags: Data Structures, Greedy Just Long Neckties  JOI 2020 Final Round  Batch  90 
laughter  N/A  ⓘTags: Binary Search, Data Structures, Line Sweep/Sliding Window laughter  Educational Codeforces Round 27  Batch  14 
smurfberries  N/A  ⓘTags: Binary Search smurfberries  AllUkrainian School Olympiad in Informatics 2011  Batch  25 
smallprimes_ex  N/A  ⓘTags: Meet in the Middle Small Primes?  Classic Problem?  Batch  34 
removeedges  N/A  ⓘTags: Graph Theory removeedges  Atcoder  Batch  24 
bichrome  N/A  ⓘTags: Graph Theory, Math, Trees bichrome  Atcoder  Batch  15 
funnytree  N/A  ⓘTags: Graph Theory, Trees Funny Tree (Extreme Version)  RuCode 2020 Div A (Extreme Version) (0rang3, rs)  Batch  8 
christmasturkeyfarm  N/A  ⓘTags: Data Structures Christmas Turkey Farming  Educational Round 2 (dillion)  Batch  18 
christmastree  N/A  ⓘTags: Graph Theory, Trees Christmas Tree  Educational Round 2 (errorgorn, oolimry)  Batch  13 
pairs  N/A  ⓘTags: Binary Search pairs  AtCoder Beginner Contest 155  Batch  49 
christmasfiboseq  N/A  ⓘTags: Math Chirstmas Fibonacci Sequence  Educational Round 2 (errorgorn)  Batch  9 
candies_joi  N/A  ⓘTags: Adhoc, Greedy candies_joi  JOI 2017/2018 Spring Camp  Batch  28 
blocks  N/A  ⓘTags: Information Theory, Math Blocks  UWCOI 2020 (socho, astoria, kimbj0709)  Interactive  5 
books  N/A  ⓘTags: Graph Theory, Greedy Ancient Books  IOI 2017  Interactive  8 
escape  N/A  ⓘTags: Bitmask, Brute Force, Graph Theory Escape  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  6 
naan  N/A  ⓘTags: Greedy, Math naan  JOI 2018/2019 Spring Camp  Batch  18 
baseplans  N/A  ⓘTags: Adhoc Base Plans  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  16 
merchant  N/A  ⓘTags: Binary Search, Dynamic Programming, Graph Theory Travelling Merchant  APIO 2017  Batch  18 
runway  N/A  ⓘTags: Binary Search, Graph Theory Jianzhi’s Runway Show  RI NOI Selection Test 2017  Batch  61 
rabbitlineup  N/A  ⓘTags: Divide and Conquer, Dynamic Programming rabbitlineup  Dunjudge Archive  Batch  15 
globalwarming  N/A  ⓘTags: Line Sweep/Sliding Window Global Warming  NOI 2013  Batch  107 
justright  N/A  ⓘTags: Binary Search justright  Dunjudge Archive  Batch  60 
lunchcombo  N/A  ⓘTags: Binary Search, Greedy lunchcombo  RI November Course Stage 2 Selection Test 2019  Batch  60 
rubies  N/A  ⓘTags: Binary Search rubies  Dunjudge Archive (pwypeanut)  Batch  40 
summit  N/A  ⓘTags: Binary Search summit  Dunjudge Archive  Batch  128 
nonboringsequences  N/A  ⓘTags: Divide and Conquer nonboringsequences  Dunjudge Archive  Batch  42 
ljubomora  N/A  ⓘTags: Binary Search ljubomora  COCI 2012/2013  Batch  141 
inversions  N/A  ⓘTags: Data Structures, Divide and Conquer inversions  Dunjudge Archive  Batch  85 
fuel  N/A  ⓘTags: Greedy fuel  Dunjudge Archive  Batch  127 
harddisk  N/A  ⓘTags: Bitmask, Brute Force, Meet in the Middle harddisk  2015 NOI Training ProblemSetter Contest  Batch  73 
catfight  N/A  ⓘTags: Line Sweep/Sliding Window catfight  Dunjudge Archive  Batch  203 
bobek  N/A  ⓘTags: Bitmask, Meet in the Middle bobek  CEOI 2015  Batch  80 
4sum  N/A  ⓘTags: Meet in the Middle 4sum  NOI 2008  Batch  155 
flamethrower  N/A  ⓘTags: Brute Force Flame Thrower  Dunjudge Archive  Batch  456 
candymountain_ex  N/A  ⓘTags: Data Structures, Dynamic Programming candymountain_ex  Dunjudge Archive  Batch  148 
christmasfeast  N/A  ⓘTags: Adhoc Christmas Feast  Educational Round 2 (errorgorn)  Batch  59 
baseplans_ex  N/A  ⓘTags: Data Structures baseplans_ex  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  23 
omnomnom2  N/A  ⓘTags: Graph Theory, Trees omnomnom2  Classic Problem  Batch  97 
toll  N/A  ⓘTags: Data Structures, Dynamic Programming toll  BOI 2017  Batch  22 
lcm  N/A  ⓘTags: Math lcm  Classic Problem  Batch  105 
segmenttree2  N/A  ⓘTags: Data Structures Segment Tree 2  Classic Problem  Batch  146 
omnomnom  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees omnomnom  Classic Problem  Batch  129 
replacedigits  N/A  ⓘTags: Data Structures Replace Digits  ACL Beginner Contest  Batch  61 
ragingthunder  N/A  ⓘTags: Data Structures Raging Thunder  Codeforces  Batch  11 
goodsubsegments  N/A  ⓘTags: Data Structures goodsubsegments  Codeforces Round #493 (Div. 1)  Batch  6 
fire  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window fire  JOI 2020 Final Round  Batch  8 
garaza  N/A  ⓘTags: Data Structures, Math garaza  COCI  Batch  5 
collaboration  N/A  ⓘTags: Data Structures, Graph Theory, Trees Collaboration  December Course 2019 Advanced Final Contest (0rang3)  Interactive  10 
optimalsubseq  N/A  ⓘTags: Binary Search, Data Structures optimalsubseq  Codeforces 1227D2  Batch  45 
sightseeing2  N/A  ⓘTags: Graph Theory, Trees sightseeing2  RI NOI Selection Test 2015  Batch  64 
examinations  N/A  ⓘTags: Data Structures examinations  JOI  Batch  40 
bacteria  N/A  ⓘTags: Data Structures bacteria  Dunjudge Archive  Batch  40 
sherlockinversions  N/A  ⓘTags: Data Structures, Square Root Decomposition sherlockinversions  Dunjudge Archive  Batch  48 
timeleap  N/A  ⓘTags: Data Structures timeleap  JOI  Batch  3 
streetlamps  N/A  ⓘTags: Data Structures, Divide and Conquer Street Lamps  APIO 2019  Batch  13 
sterilizing  N/A  ⓘTags: Data Structures sterilizing  JOI 2014/15  Batch  42 
ohbabyntriples  N/A  ⓘTags: Binary Search, Data Structures, Greedy Oh Baby, n Triples!  IOI 2020 Practice Session  Batch  9 
collectmushrooms5  N/A  ⓘTags: Greedy collectmushrooms5  Dunjudge Archive  Batch  11 
collectmushrooms4  N/A  ⓘTags: Data Structures, Dynamic Programming collectmushrooms4  Dunjudge Archive  Batch  18 
collectmushrooms3  N/A  ⓘTags: Data Structures collectmushrooms3  Dunjudge Archive  Batch  54 
collectmushrooms  N/A  ⓘTags: Syntax collectmushrooms  Dunjudge Archive  Batch  109 
sortbooks  N/A  ⓘTags: Data Structures sortbooks  IZhO 2019  Batch  31 
poklon  N/A  ⓘTags: Data Structures, Square Root Decomposition poklon  COCI 2016/2017  Batch  50 
cake  N/A  ⓘTags: Brute Force, Data Structures cake  CEOI 2014  Batch  25 
flights  N/A  ⓘTags: Graph Theory flights  Dunjudge Archive  Batch  56 
simp  N/A  ⓘTags: Adhoc, Brute Force Simp  Codeforces 1033A  Batch  280 
trains_mco  N/A  ⓘTags: Graph Theory, Greedy trains_mco  MCO 2015  Batch  8 
removeelements  N/A  ⓘTags: Binary Search, Data Structures removeelements  Codeforces Round #668  Batch  27 
fortunetelling  N/A  ⓘTags: Data Structures Fortune Telling 2  JOI 2014  Batch  30 
ferries  N/A  ⓘTags: Graph Theory ferries  NOI 2013  Batch  37 
inheritance  N/A  ⓘTags: Binary Search, Graph Theory inheritance  JOI 2014/2015  Batch  67 
rblock  N/A  ⓘTags: Graph Theory rblock  USACO 2011 December Contest, Silver Division  Batch  63 
towerdefense  N/A  ⓘTags: Graph Theory towerdefense  Dunjudge Archive  Batch  63 
boundlessboxes  N/A  ⓘTags: Graph Theory boundlessboxes  Dunjudge Archive  Batch  113 
snakenladder  N/A  ⓘTags: Dynamic Programming snakenladder  Dunjudge Archive  Batch  67 
universe  N/A  ⓘTags: Graph Theory, Trees universe  Dunjudge Archive  Batch  117 
subgraphs  N/A  ⓘTags: Graph Theory Subgraphs  Dunjudge Archive  Batch  296 
splithunny  N/A  ⓘTags: Graph Theory splithunny  Dunjudge Archive  Batch  266 
magicwand  N/A  ⓘTags: Graph Theory magicwand  Dunjudge Archive  Batch  111 
milkweed  N/A  ⓘTags: Graph Theory milkweed  Dunjudge Archive  Batch  181 
adjmatrix  N/A  ⓘTags: Graph Theory Adjacency Matrix  Dunjudge Archive  Batch  423 
adjlist  N/A  ⓘTags: Graph Theory Adjacency List  Dunjudge Archive  Batch  375 
dijkstra  N/A  ⓘTags: Graph Theory dijkstra  Dunjudge Archive  Batch  177 
bracketsuperseq  N/A  ⓘTags: Dynamic Programming Shortest Bracket Supersequence  Codeforces 1272F  Batch  33 
beautifulbrackets  N/A  ⓘTags: Dynamic Programming Beautiful Bracket Sequence  Codeforces 1264D1  Batch  29 
fractionalmultiset  N/A  ⓘTags: Dynamic Programming Fractional Multiset  ARC 107  Batch  34 
hedgehogcrimes_easy  N/A  ⓘTags: Dynamic Programming Hedgehog Crimes (Easy Version)  Classic Problem  Batch  125 
unmerge  N/A  ⓘTags: Dynamic Programming Unmerge  Codeforces 1381B  Batch  62 
infiniteloop  N/A  ⓘTags: Graph Theory Infinite Looping Sequence  2017 RI Dec Course Sel (pwypeanut)  Batch  20 
arrangetoys  N/A  ⓘTags: Graph Theory, Math Arranging Toy Displays  AGC 016D  Batch  18 
catchingcheaters  N/A  ⓘTags: Dynamic Programming Catching Cheaters  Codeforces Round 683 (Div 1)  Batch  49 
subknapsack  N/A  ⓘTags: Dynamic Programming Knapsack for All Subsets  Atcoder Beginner Contest 169  Batch  37 
moosic  N/A  ⓘTags: Data Structures moosic  Codeforces Round #386  Batch  26 
conversations  N/A  ⓘTags: Data Structures Zookeeper's Conversations  Singapore Zoo (shenxy13)  Batch  85 
berlandtaxi  N/A  ⓘTags: Data Structures Berland.Taxi  NEERC 2017 Southern Subregional Contest  Batch  21 
frogs  N/A  ⓘTags: Syntax Frogs  Winter Computer School 2010/11 Team Contest #1  Batch  178 
smallprimes  N/A  ⓘTags: Brute Force, Math Small Primes  Classic Problem  Batch  89 
beareatrabbit  N/A  ⓘTags: Dynamic Programming Bear Eat Rabbit  Classic Problem  Batch  221 
fibo  N/A  ⓘTags: Dynamic Programming, Math Fibonacci  Classic Problem  Batch  521 
mercurypoisoning  N/A  ⓘTags: Graph Theory Mercury Poisoning  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  12 
pairsums  N/A  ⓘTags: Syntax Button Pairs  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  204 
peakfinding  N/A  ⓘTags: Syntax Peak Finding  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  118 
mountains  N/A  ⓘTags: Data Structures Mountains  NOI 2020 Prelims  Batch  118 
snapknack  N/A  ⓘTags: Dynamic Programming snapknack  Dunjudge Archive  Batch  43 
rabbiteatrabbit  N/A  ⓘTags: Dynamic Programming rabbiteatrabbit  Dec Trg 2019 (Elementary) (jamielim)  Batch  82 
trains  N/A  ⓘTags: Dynamic Programming trains  Dunjudge Archive  Batch  140 
walking  N/A  ⓘTags: Dynamic Programming walking  NOI 2012  Batch  51 
lis_easy  N/A  ⓘTags: Dynamic Programming lis_easy  Classic problem  Batch  365 
moneychanger  N/A  ⓘTags: Dynamic Programming moneychanger  Dunjudge Archive  Batch  208 
speakers  N/A  ⓘTags: Greedy speakers  Dunjudge Archive  Batch  131 
routers  N/A  ⓘTags: Greedy routers  Dunjudge Archive  Batch  77 
pandaeyes  N/A  ⓘTags: Greedy pandaeyes  Dunjudge Archive  Batch  158 
blanko  N/A  ⓘTags: Data Structures, Greedy blanko  Dunjudge Archive  Batch  12 
weddingcoins  N/A  ⓘTags: Greedy weddingcoins  Dunjudge Archive  Batch  282 
numericalstrings  N/A  ⓘTags: Greedy, Math numericalstrings  RI November Course Stage 2 Selection Test 2019  Batch  49 
binarycoins  N/A  ⓘTags: Bitmask, Greedy, Syntax binarycoins  Dunjudge Archive  Batch  265 
lemonadestand  N/A  ⓘTags: Greedy lemonadestand  Dunjudge Archive  Batch  24 
change  N/A  ⓘTags: Greedy change  NOI 2011  Batch  37 
lopov  N/A  ⓘTags: Data Structures lopov  COCI 2013/2014  Batch  15 
bridge_apio15  N/A  ⓘTags: Data Structures Palembang Bridges  APIO 2015  Batch  26 
ballgame  N/A  ⓘTags: Data Structures, Dynamic Programming ballgame  Dunjudge Archive  Interactive  42 
optmilk  N/A  ⓘTags: Data Structures, Dynamic Programming Optimal Milking  Dunjudge Archive  Batch  78 
clique  N/A  ⓘTags: Data Structures clique  Algorithm Class MiniContest 8  Batch  54 
jams  N/A  ⓘTags: Data Structures Jams  Algorithm Class MiniContest 8  Batch  24 
penguinfood  N/A  ⓘTags: Data Structures penguinfood  Dunjudge Archive  Batch  64 
illuminate  N/A  ⓘTags: Math, Syntax Illuminate  RIHCI NOI Selection Test 2020 (bensonlzl)  Batch  174 
wabot  N/A  ⓘTags: Greedy wabot  December Course 2019 Advanced Final Contest (bensonlzl)  Batch  184 
boxispull  N/A  ⓘTags: Adhoc, Syntax Box is Pull  Codeforces Raif Round 1 (bensonlzl)  Batch  436 
artswap  N/A  ⓘTags: Data Structures artswap  HCI NOI Selection Retest 2020 (bensonlzl)  Interactive  19 
smurf  N/A  ⓘTags: Brute Force, Syntax smurf  RI Deccourse 2018 Selection Test (tch1001)  Batch  385 
paint_apio  N/A  ⓘTags: Adhoc, Line Sweep/Sliding Window, Square Root Decomposition paint_apio  APIO 2020  Interactive  13 
swap  N/A  ⓘTags: Graph Theory, Trees Swapping Cities  APIO 2020  Interactive  20 
fun  N/A  ⓘTags: Adhoc, Graph Theory, Information Theory, Trees Fun Tour  APIO 2020  Interactive  5 
bracketex  N/A  ⓘTags: Data Structures, Syntax bracketex  Dunjudge Archive  Batch  314 
lineup  N/A  ⓘTags: Line Sweep/Sliding Window lineup  USACO Silver Nov 2011  Batch  148 
poi  N/A  ⓘTags: Syntax poi  IOI 2009  Batch  109 
catlunch  N/A  ⓘTags: Data Structures, Greedy catlunch  RI/RJC NOI Selection Test 2016  Batch  229 
ccs  N/A  ⓘTags: Binary Search, Data Structures ccs  Dunjudge Archive  Batch  177 
medianheap  N/A  ⓘTags: Data Structures medianheap  Dunjudge Archive  Batch  154 
supermarket  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window supermarket  RI Dec Course Sel 2017  Batch  48 
lengthsort  N/A  ⓘTags: Syntax lengthsort  Dunjudge Archive  Batch  298 
arrayfind  N/A  ⓘTags: Binary Search arrayfind  Dunjudge Archive  Batch  254 
contestcalc  N/A  ⓘTags: Math, Syntax contestcalc  Dunjudge Archive  Batch  320 
lvm  N/A  ⓘTags: Brute Force, Data Structures lvm  NOI 2008  Batch  221 
brick  N/A  ⓘTags: Data Structures brick  Dunjudge Archive  Batch  398 
guanine  N/A  ⓘTags: Data Structures guanine  Dunjudge Archive  Batch  281 
puttingstrings  N/A  ⓘTags: Constructive Algorithms, Graph Theory puttingstrings  RIHCI December Course Selection 2020 (rs)  Batch  19 
springtrap  N/A  ⓘTags: Data Structures springtrap  Educational Round 1 (bensonlzl)  Batch  3 
lppfnlcst  N/A  ⓘTags: Binary Search, Data Structures Lazy Propagation Persistant Fat Nodes Li Chao Segment Tree  Educational Round 1 (errorgorn)  Batch  23 
lemmas  N/A  ⓘTags: Graph Theory lemmas  Educational Round 1 (errorgorn)  Batch  33 
spaceinvaders  N/A  ⓘTags: Brute Force, Data Structures, Dynamic Programming, Line Sweep/Sliding Window spaceinvaders  Educational Round 1 (bensonlzl)  Batch  37 
seats  N/A  ⓘTags: Data Structures Seats  IOI 2018  Interactive  3 
divsum  N/A  ⓘTags: Math Divisor Sum  Educational Round 1 (errorgorn)  Batch  18 
cakerun  N/A  ⓘTags: Data Structures Bowen's Cake Run  December Course 2019 Advanced Final Contest (rs)  Batch  17 
messy  N/A  ⓘTags: Binary Search Unscrambling a Messy Bug  IOI 2016  Interactive  5 
maximum  N/A  ⓘTags: Syntax Maximum  Dunjudge Archive  Batch  740 
sumint  N/A  ⓘTags: Syntax Sum of Integers  Dunjudge Archive  Batch  759 
segmenttree  N/A  ⓘTags: Data Structures Segment Tree  Classic problem  Batch  232 
naptime  N/A  ⓘTags: Graph Theory, Greedy naptime  RIHCI December Course Selection 2020 (cstuart)  Batch  34 
conversations_easy  N/A  ⓘTags: Data Structures Zookeeper's Conversations (Easy Version)  RIHCI December Course Selection 2020 (shenxy13)  Batch  102 
interestring  N/A  ⓘTags: Dynamic Programming, Math interestring  RIHCI December Course Selection 2020 (cstuart)  Batch  18 
square_ioi  N/A  ⓘTags: Dynamic Programming square_ioi  IOI 2014 Practice  Interactive  34 
tickets  N/A  ⓘTags: Adhoc, Data Structures Carnival Tickets  IOI 2020  Interactive  10 
horses  N/A  ⓘTags: Data Structures, Math horses  IOI 2015  Interactive  21 
fencing2  N/A  ⓘTags: Data Structures fencing2  RIHCI December Course Selection 2020 (errorgorn)  Batch  5 
xorb  N/A  ⓘTags: Math, Syntax xorb  Dunjudge Archive  Batch  43 
fruitsequences  N/A  ⓘTags: Adhoc, Data Structures Fruit Sequences  Codeforces Raif Round 1 (bensonlzl)  Batch  48 
bracketscore  N/A  ⓘTags: Greedy bracketscore  AGC48  Batch  38 
growingtrees  N/A  ⓘTags: Binary Search, Data Structures growingtrees  BOI 2011  Batch  36 
singlefile  N/A  ⓘTags: Data Structures singlefile  Dunjudge Archive  Batch  69 
taxcollection  N/A  ⓘTags: Greedy, Syntax taxcollection  RIHCI December Course Selection 2020 (JustAWallaby)  Batch  93 
entropy  N/A  ⓘTags: Greedy, Syntax entropy  RIHCI December Course Selection 2020 (0rang3)  Batch  98 
applefarm  N/A  ⓘTags: Graph Theory applefarm  NUSH ISC 2020 (oolimry)  Batch  61 
basketball  N/A  ⓘTags: Binary Search, Greedy basketball  NUSH ISC 2020 (dantoh)  Batch  35 
coke  N/A  ⓘTags: Dynamic Programming, Greedy Coke  NUSH ISC 2020 (errorgorn)  Batch  73 
ljll  N/A  ⓘTags: Math LJLL  NUSH ISC 2020 (errorgorn)  Batch  51 
performance  N/A  ⓘTags: Math Performance  NUSH ISC 2020 (oolimry)  Batch  38 
ping  N/A  ⓘTags: Syntax ping  RI HCI NOI Selection 2019 Practice (bensonlzl)  Interactive  62 
safety  N/A  ⓘTags: Dynamic Programming, Slope Trick Safety  NOI 2018  Batch  23 
aesthetic  N/A  ⓘTags: Binary Search, Data Structures, Graph Theory aesthetic  NOI 2020 Finals  Batch  10 
arcade  N/A  ⓘTags: Adhoc, Data Structures, Dynamic Programming arcade  NOI 2020 Finals  Batch  19 
progression  N/A  ⓘTags: Data Structures progression  NOI 2020 Finals  Batch  32 
discharging  N/A  ⓘTags: Data Structures, Dynamic Programming discharging  NOI 2020 Finals  Batch  40 
labels  N/A  ⓘTags: Adhoc labels  NOI 2020 Finals  Batch  91 
biscuits  N/A  ⓘTags: Dynamic Programming, Math Packing Biscuits  IOI 2020 (Day 2)  Interactive  8 
pandaski  N/A  ⓘTags: Data Structures, Dynamic Programming pandaski  NOI 2016  Batch  12 
rockclimbing  N/A  ⓘTags: Graph Theory rockclimbing  NOI 2016  Batch  11 
fabric  N/A  ⓘTags: Data Structures, Dynamic Programming fabric  NOI 2016  Batch  6 
pokemonmaster  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Square Root Decomposition, Trees I want to be the very best too!  NOI 2017  Batch  7 
mergecards  N/A  ⓘTags: Adhoc, Dynamic Programming Merge Cards  Google Kick Start 2020 Round G  Batch  3 
exponentiate_ex  N/A  ⓘTags: Math exponentiate_ex  Classic Problem  Batch  67 
carrots  N/A  ⓘTags: Greedy carrots  Codeforces Raif Round 1 (errorgorn)  Batch  71 
abbb  N/A  ⓘTags: Greedy abbb  Codeforces Raif Round 1 (errorgorn)  Batch  84 
firefighting  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees firefighting  NOI 2020 Qualification  Batch  27 
relaymarathon  N/A  ⓘTags: Brute Force, Graph Theory relaymarathon  NOI 2020 Qualification  Batch  26 
fuelstation  N/A  ⓘTags: Data Structures fuelstation  NOI 2020 Qualification  Batch  33 
crypto  N/A  ⓘTags: Data Structures crypto  NOI 2020 Qualification  Batch  53 
rmq  N/A  ⓘTags: Data Structures, Greedy rmq  NOI 2017  Batch  23 
hotspot  N/A  ⓘTags: Graph Theory hotspot  NOI 2017  Batch  15 
boomerangs  N/A  ⓘTags: Adhoc Bouncing Boomerangs  Codeforces Raif Round 1 (bensonlzl)  Batch  4 
riggedroads  N/A  ⓘTags: Graph Theory, Greedy, Trees riggedroads  NOI 2019  Batch  29 
feast  N/A  ⓘTags: Binary Search, Dynamic Programming, Greedy feast  NOI 2019  Batch  34 
lasers  N/A  ⓘTags: Adhoc, Data Structures lasers  NOI 2019  Batch  36 
pilot  N/A  ⓘTags: Adhoc, Data Structures pilot  NOI 2019  Batch  82 
charges  N/A  ⓘTags: Graph Theory Experimental Charges  NOI 2019 Prelims  Batch  56 
lightningrod  N/A  ⓘTags: Adhoc, Data Structures LightningRod  NOI 2018  Batch  121 
journey3  N/A  ⓘTags: Dynamic Programming Journey  NOI 2018  Batch  32 
knapsack  N/A  ⓘTags: Dynamic Programming Knapsack  NOI 2018 Prelims  Batch  42 
plagia  N/A  ⓘTags: Data Structures plagia  December Course 2018 Advanced Final Contest  Batch  22 
collectmushrooms2  N/A  ⓘTags: Data Structures collectmushrooms2  Dunjudge Archive  Batch  86 
appeal  N/A  ⓘTags: Data Structures appeal  Dunjudge Archive  Batch  34 
fenwicktree  N/A  ⓘTags: Data Structures fenwicktree  Classic Problem  Batch  144 
rotarylock  N/A  ⓘTags: Data Structures rotarylock  HCI NOI Selection Test 2015  Batch  102 
candies  N/A  ⓘTags: Data Structures candies  Dunjudge Archive  Batch  93 
pushups  N/A  ⓘTags: Math pushups  Dunjudge Archive  Batch  109 
sortedandsorted  N/A  ⓘTags: Data Structures, Dynamic Programming sortedandsorted  ARC 097  Batch  5 
shikandgame  N/A  ⓘTags: Data Structures, Dynamic Programming, Line Sweep/Sliding Window shikandgame  AGC 007  Batch  13 
car  N/A  ⓘTags: Graph Theory car  Dunjudge Archive  Batch  198 
rabbittolls  N/A  ⓘTags: Graph Theory rabbittolls  Dunjudge Archive  Batch  17 
cycling  N/A  ⓘTags: Graph Theory, Trees cycling  Dunjudge Archive  Batch  16 
sealevel  N/A  ⓘTags: Graph Theory sealevel  Dunjudge Archive  Batch  133 
penguinislands  N/A  ⓘTags: Dynamic Programming, Graph Theory penguinislands  Dunjudge Archive  Batch  42 
transform  N/A  ⓘTags: Brute Force, Dynamic Programming, Graph Theory transform  Dunjudge Archive  Batch  90 
rank  N/A  ⓘTags: Graph Theory rank  NOI 2008  Batch  78 
foreveralone  N/A  ⓘTags: Data Structures foreveralone  Dunjudge Archive  Batch  181 
nemo  N/A  ⓘTags: Graph Theory nemo  Dunjudge Archive  Batch  80 
catleap  N/A  ⓘTags: Graph Theory catleap  Dunjudge Archive  Batch  28 
binaryroads  N/A  ⓘTags: Graph Theory binaryroads  Dunjudge Archive  Batch  76 
pandacity  N/A  ⓘTags: Graph Theory, Greedy pandacity  Dunjudge Archive  Batch  64 
goodmorning  N/A  ⓘTags: Graph Theory Good Morning  ISC 2020 practice (errorgorn)  Batch  11 
nihonese  N/A  ⓘTags: Syntax nihonese  ISC 2020 practice (errorgorn)  Batch  82 
simcity  N/A  ⓘTags: Graph Theory simcity  Dunjudge Archive  Batch  65 
sightseeing  N/A  ⓘTags: Graph Theory, Trees sightseeing  NOI 2014  Batch  120 
minimax  N/A  ⓘTags: Graph Theory, Trees minimax  Hello 2020 (errorgorn)  Batch  2 
buycomputer  N/A  ⓘTags: Greedy, Syntax buycomputer  Dec Trg 2019 (Elementary) (errorgorn)  Batch  43 
surnames  N/A  ⓘTags: Dynamic Programming, Graph Theory, Square Root Decomposition, Trees Surnames  2020 CNY (errorgorn)  Batch  13 
unluckyfloors  N/A  ⓘTags: Dynamic Programming unluckyfloors  NOI 2016  Batch  40 
bestplace  N/A  ⓘTags: Greedy, Syntax bestplace  NOI 2017  Batch  201 
xmas  N/A  ⓘTags: Syntax xmas  NOI 2009  Batch  363 
rmaxq  N/A  ⓘTags: Data Structures Range Max Query  Dunjudge Archive  Batch  134 
roadsideadverts  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees roadsideadverts  NOI 2017  Batch  72 
bananafarm  N/A  ⓘTags: Data Structures bananafarm  NOI 2015  Batch  84 
card  N/A  ⓘTags: Data Structures Card  NOI 2010  Batch  386 
gift  N/A  ⓘTags: Syntax gift  NOI 2007  Batch  122 
lunchbox  N/A  ⓘTags: Greedy Lunch Box  NOI 2016  Batch  621 
paint  N/A  ⓘTags: Greedy paint  NOI 2011  Batch  365 
levenshtein  N/A  ⓘTags: Dynamic Programming levenshtein  Classic problem  Batch  74 
helloworld  N/A  ⓘTags: Syntax Hello World  Classic problem  Batch  1061 
chocolate  N/A  ⓘTags: Dynamic Programming chocolate  Dunjudge Archive  Batch  18 
watching  N/A  ⓘTags: Binary Search, Dynamic Programming watching  JOI Open 2013  Batch  85 
bottle  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Bottle  Dunjudge Archive  Batch  27 
goinghome_agc  N/A  ⓘTags: Data Structures, Greedy goinghome_agc  AGC 023  Batch  36 
ufo  N/A  ⓘTags: Dynamic Programming ufo  Dunjudge Archive  Batch  9 
radioactive  N/A  ⓘTags: Divide and Conquer, Dynamic Programming radioactive  NOI 2015  Batch  21 
niangao  N/A  ⓘTags: Data Structures Nian Gao  2020 CNY (errorgorn)  Batch  6 
excombo  N/A  ⓘTags: Dynamic Programming, Greedy EX Combo  RSA Fun Contest (oolimry)  Batch  16 
radiance  N/A  ⓘTags: Square Root Decomposition radiance  RSA Fun Contest (oolimry)  Batch  13 
hole  N/A  ⓘTags: Binary Search, Dynamic Programming hole  Dunjudge Archive  Batch  31 
collectmushrooms6  N/A  ⓘTags: Dynamic Programming CollectMushrooms  NOI 2018  Batch  150 
special  N/A  ⓘTags: Dynamic Programming special  Dunjudge Archive  Batch  32 
history  N/A  ⓘTags: Dynamic Programming history  Dunjudge Archive  Batch  51 
commonsubstring  N/A  ⓘTags: Dynamic Programming commonsubstring  Dunjudge Archive  Batch  58 
monopoly  N/A  ⓘTags: Dynamic Programming monopoly  Dunjudge Archive  Batch  47 
buffet  N/A  ⓘTags: Dynamic Programming buffet  Dunjudge Archive  Batch  145 
mate  N/A  ⓘTags: Graph Theory mate  RSA Fun Contest (errorgorn)  Batch  19 
girlfriends  N/A  ⓘTags: Explicitly Excluded (from IOI), Math girlfriends (EE)  CP Singles Day Contest 2020 (errorgorn)  Batch  3 
floors  N/A  ⓘTags: Data Structures floors  Dunjudge Archive  Batch  131 
inequality  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming, Line Sweep/Sliding Window inequality  RIHCI NOI Selection Test 2020 (0rang3)  Batch  10 
catnames  N/A  ⓘTags: Math catnames  RI/RJC NOI Selection Test 2016  Batch  20 
pokeadd  N/A  ⓘTags: Math pokeadd  Dunjudge Archive  Batch  32 
chessislands  N/A  ⓘTags: Graph Theory chessislands  NOI 2010 Selection Test  Batch  94 
primefactorization  N/A  ⓘTags: Math primefactorization  Dunjudge Archive  Batch  167 
papaya  N/A  ⓘTags: Graph Theory papaya  Dunjudge Archive  Batch  78 
amicablecats  N/A  ⓘTags: Math, Syntax amicablecats  Dunjudge Archive  Batch  99 
gcd  N/A  ⓘTags: Math, Syntax Greatest Common Divisor  Classic Problem  Batch  607 
pokenumbers  N/A  ⓘTags: Math pokenumbers  Dunjudge Archive  Batch  34 
exponentiate  N/A  ⓘTags: Math Exponentiate  Classic Problem  Batch  312 
nprime  N/A  ⓘTags: Brute Force, Math Prime  NOI 2008  Batch  272 
mrt  N/A  ⓘTags: Graph Theory MRT  Dunjudge Archive  Batch  205 
dinowalk  N/A  ⓘTags: Graph Theory dinowalk  Classic Problem  Batch  117 
prime  N/A  ⓘTags: Math Prime Numbers  Classic Problem  Batch  409 
housing  N/A  ⓘTags: Dynamic Programming housing  NOI 2008  Batch  90 
coincombinations  N/A  ⓘTags: Dynamic Programming coincombinations  Classic Problem  Batch  138 
republiccity  N/A  ⓘTags: Graph Theory Republic City  RI Nov Sel 2020 (JustAWallaby)  Batch  22 
stonk  N/A  ⓘTags: Greedy Stonks  Dec Trg 2019 (Elementary) (shenxy13)  Batch  130 
firelord  N/A  ⓘTags: Dynamic Programming firelord  RI Nov Sel 2020 (jiahng)  Batch  44 
coinbag  N/A  ⓘTags: Dynamic Programming coinbag  Dunjudge Archive  Batch  173 
potatotree  N/A  ⓘTags: Data Structures potatotree  RI Nov Sel 2020 (syy)  Batch  140 
dyingpolynomial  N/A  ⓘTags: Binary Search Dying Polynomial  RI Nov Sel 2020 (JustAWallaby)  Batch  94 
exam  N/A  ⓘTags: Syntax Exam  RI Nov Sel 2020 (syy)  Batch  817 
gecko  N/A  ⓘTags: Dynamic Programming gecko  NOI 2008  Batch  262 
pascal  N/A  ⓘTags: Dynamic Programming, Math pascal  Dunjudge Archive  Batch  143 
flybot  N/A  ⓘTags: Dynamic Programming flybot  Dunjudge Archive  Batch  212 
strawberry  N/A  ⓘTags: Data Structures, Dynamic Programming Speedy Strawberries  2020 CNY (shenxy13)  Batch  15 
divisibility  N/A  ⓘTags: Dynamic Programming divisibility  Dunjudge Archive  Batch  49 
lcs  N/A  ⓘTags: Dynamic Programming lcs  Classic problem  Batch  215 
luckynumbers  N/A  ⓘTags: Adhoc, Dynamic Programming Lucky Numbers  Educational Round 8 (Goodbye oolimry) (oolimry)  Batch  7 
cardtrick  N/A  ⓘTags: Data Structures Card Trick  Classic Problem (oolimry)  Batch  33 
addition  N/A  ⓘTags: Syntax Addition of 2 numbers  Classic problem  Batch  906 
general  N/A  ⓘTags: Graph Theory general  Classic Problem  Batch  167 
lis  N/A  ⓘTags: Binary Search, Dynamic Programming Longest Increasing Subsequence  Classic problem  Batch  206 
deathray  N/A  ⓘTags: Data Structures deathray  Dec Trg 2019 (Elementary) (shenxy13)  Batch  59 
pigeonnests  N/A  ⓘTags: Data Structures, Graph Theory, Trees pigeonnests  RSA Fun Contest (shenxy13)  Batch  32 
leftright  N/A  ⓘTags: Data Structures Left and Right  Dec Trg 2019 (Elementary) (oolimry)  Batch  106 
greeting  N/A  ⓘTags: Syntax CNY Greetings  2020 CNY (errorgorn)  Batch  212 
doubletrouble  N/A  ⓘTags: Data Structures, Greedy Double Trouble  Dec Trg 2019 (Elementary) (oolimry)  Batch  27 
frisbee  N/A  ⓘTags: Data Structures, Dynamic Programming, Slope Trick Frisbee Training  2019 IOI Problem Setter Contest (0rang3)  Batch  8 
mincross_usaco  N/A  ⓘTags: Data Structures mincross_usaco  USACO 2017 Feb, Platinum  Batch  3 