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


stories  N/A  ⓘTags: Dynamic Programming, Graph Theory Stories Cat  RI November Course Stage 2 Selection Test 2022 (AJR)  Batch  30 
garden  N/A  ⓘTags: Graph Theory Garden Cat  RI November Course Stage 2 Selection Test 2022 (tux, ryangohca)  Batch  31 
routine  N/A  ⓘTags: Binary Search Routine Cat  RI November Course Stage 2 Selection Test 2022 (wangy412)  Batch  71 
eating  N/A  ⓘTags: Data Structures Eating Cat  RI November Course Stage 2 Selection Test 2022 (wangy412)  Batch  54 
reading  N/A  ⓘTags: Math, Syntax Reading Cat  RI November Course Stage 2 Selection Test 2022 (wangy412)  Batch  64 
choochoo  N/A  ⓘTags: Syntax Choo Choo  RIHCI Final Contest 2022 (bensonlzl)  Batch  77 
superpiece  N/A  Superpiece  EGOI 2022 Day 2  Batch  1 
datacenters  N/A  Data Centers  EGOI 2022 Day 2  Batch  7 
tourists  N/A  Tourists  EGOI 2022 Day 1  Batch  4 
subsetmex  N/A  Subset Mex  EGOI 2022 Day 1  Batch  7 
legowall  N/A  Lego Wall  EGOI 2022 Day 1  Batch  4 
candycrush  N/A  ⓘTags: Dynamic Programming, Implementation Cancer Candy Crush  Dunjudge Archive  Batch  1 
dzumbus  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Džumbus  COCI 2019/2020  Batch  2 
unitedcows  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window United Cows  USACO 2021 Open, Gold  Batch  3 
flyingsquirrel  N/A  ⓘTags: Data Structures, Dynamic Programming, Greedy, Slope Trick Flying Squirrel  Korean IOI Selection Day 1  Batch  4 
delegation  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Delegation  USACO 2020 Feb, Gold  Batch  3 
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  5 
izbori  N/A  ⓘTags: Adhoc, Data Structures, Math izbori  COCI 2021/2022  Batch  4 
sandcastle2  N/A  Sandcastle 2  JOI 2022 Final Round  Batch  2 
railwaytrip2  N/A  Railway Trip 2  JOI 2022 Final Round  Batch  2 
election_joi22  N/A  Let's Win the Election  JOI 2022 Final Round  Batch  3 
selfstudy  N/A  Self Study  JOI 2022 Final Round  Batch  3 
intercastellar  N/A  Intercastellar  JOI 2022 Final Round  Batch  6 
islands  N/A  Thousands Islands  IOI 2022 (Day 2)  Interactive  3 
insects  N/A  Rarest Insects  IOI 2022 (Day 2)  Interactive  3 
circuit  N/A  Digital Circuit  IOI 2022 (Day 2)  Interactive  4 
towers_ioi  N/A  Radio Towers  IOI 2022 (Day 1)  Interactive  2 
prison  N/A  Prisoner Challenge  IOI 2022 (Day 1)  Interactive  4 
fish  N/A  Catfish Farm  IOI 2022 (Day 1) (oolimry)  Interactive  5 
shopping_joi  N/A  ⓘTags: Binary Search, Data Structures, Divide and Conquer 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  8 
pizzeria  N/A  ⓘTags: Data Structures Pizzeria Queries  CSES  Batch  14 
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  2 
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  7 
bigbinarytree  N/A  ⓘTags: Greedy Big Binary Tree  RIHCI Final Contest 2022 (bensonlzl)  Batch  16 
hungryrabbits2  N/A  ⓘTags: Data Structures Hungry Rabbits 2  RIHCI Final Contest 2022 (bensonlzl)  Batch  34 
hungryrabbits1  N/A  ⓘTags: Brute Force, Greedy Hungry Rabbits 1  RIHCI Final Contest 2022 (bensonlzl)  Batch  56 
elca  N/A  ⓘTags: Data Structures, Graph Theory, Trees elca  Codeforces 482E  Batch  2 
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  19 
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  21 
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  7 
gate  N/A  ⓘTags: Data Structures, Graph Theory, Trees gate  LOJ #2474  Batch  0 
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, Implementation Cancer, 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  6 
buildings  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window Buildings  Dunjudge Archive  Batch  7 
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 servers  BOI 2021  Batch  6 
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  19 
pastiri  N/A  ⓘTags: Graph Theory, Greedy, Trees pastiri  COI 2019/2020  Batch  9 
edgeremove  N/A  ⓘTags: Dynamic Programming, Graph Theory, Implementation Cancer, 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  9 
events  N/A  ⓘTags: Data Structures, Greedy events  BOI 2022  Batch  13 
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  11 
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  16 
urbanplanning  N/A  ⓘTags: Graph Theory, Implementation Cancer, Trees urbanplanning  IZhO 2022  Batch  3 
island_boi  N/A  ⓘTags: Graph Theory, Greedy, Trees island  BOI 2022  Batch  12 
watchmen  N/A  ⓘTags: Graph Theory watchmen  BOI 2021  Batch  1 
vault  N/A  ⓘTags: Dynamic Programming, Greedy vault  BOI 2022  Batch  7 
countinghaybales  N/A  ⓘTags: Dynamic Programming countinghaybales  USACO 2022 Jan, Platinum  Batch  12 
phonenumbers  N/A  ⓘTags: 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 
bingo  N/A  ⓘTags: Adhoc, Constructive Algorithms Bingo  Grand Prix of Daejeon  Batch  23 
sculptures_apio15  N/A  ⓘTags: Bitmask, Dynamic Programming Bali Sculptures  APIO 2015  Batch  4 
train_ioi  N/A  ⓘTags: Graph Theory Toy Train  IOI 2017  Interactive  2 
wiring_ioi  N/A  ⓘTags: Dynamic Programming Wiring  IOI 2017  Interactive  3 
gap  N/A  ⓘTags: Information Theory, Math Gap  APIO 2016  Interactive  4 
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  2 
coingame  N/A  ⓘTags: Adhoc, Explicitly Excluded (from IOI) coingame  NTST 2015  Batch  14 
funnynim  N/A  ⓘTags: Explicitly Excluded (from IOI), Math funnynim  IMO Shortlist 2015  Batch  6 
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  3 
alien9  N/A  ⓘTags: Adhoc, Dynamic Programming, Math alien9  IMO Shortlist 1996  Batch  7 
streetlamps_ex  N/A  ⓘTags: Data Structures, Divide and Conquer, Implementation Cancer Street Lamps!!  APIO 2019 but with more pain  Batch  2 
alice  N/A  ⓘTags: Graph Theory, Information Theory Alice  IMO Shortlist 2019  Interactive  4 
factories  N/A  ⓘTags: Data Structures, Divide and Conquer, Explicitly Excluded (from IOI), Graph Theory, Trees factories  JOI 2014 Open  Interactive  7 
firecracker  N/A  ⓘTags: Data Structures, Greedy firecracker  CNY Contest 2019  Batch  10 
bananadance  N/A  ⓘTags: Math bananadance  Dunjudge Archive  Batch  3 
sumo  N/A  ⓘTags: Binary Search, Graph Theory sumo  COCI 2013/2014  Batch  6 
election_joi  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees Election Campaign  JOI Open 2015  Batch  2 
valley  N/A  ⓘTags: Divide and Conquer, Graph Theory, Trees Alpine valley  BOI 2019 Day 1  Batch  7 
binaryseq  N/A  ⓘTags: Math BinarySeq  Dunjudge Archive (bensonlzl)  Batch  1 
kusac  N/A  ⓘTags: Math, Syntax kusac  COCI 2013/2014  Batch  13 
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  10 
sequence  N/A  ⓘTags: Adhoc, Greedy sequence  AtCoder  Batch  2 
telepathy  N/A  ⓘTags: Joke Friendly Telepathy  April Fools' 2022 (0rang3)  Batch  93 
iqtest2  N/A  ⓘTags: Math iqtest2  April Fools' 2022 (errorgorn)  Batch  22 
kronican  N/A  ⓘTags: Bitmask, Dynamic Programming kronican  COCI 2016/2017  Batch  4 
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  7 
mountain  N/A  ⓘTags: Data Structures Mountain  IOI 2005  Batch  1 
papplesort  N/A  ⓘTags: Data Structures papplesort  Dunjudge Archive  Batch  2 
camels  N/A  ⓘTags: Data Structures Guessing Camels  NWERC 2015  Batch  2 
flowering  N/A  ⓘTags: Data Structures flowering  COCI 2008/2009  Batch  13 
inversionsum  N/A  ⓘTags: Dynamic Programming, Math inversionsum  Dunjudge Archive  Batch  1 
rabbitradar  N/A  ⓘTags: Data Structures, Dynamic Programming rabbitradar  Dunjudge Archive (bensonlzl)  Batch  2 
manhattancompass  N/A  ⓘTags: Binary Search, Graph Theory manhattancompass  AtCoder  Batch  4 
graph  N/A  ⓘTags: Graph Theory, Greedy, Trees graph  Dunjudge Archive  Batch  3 
decayedbridges  N/A  ⓘTags: Graph Theory decayedbridges  Dunjudge Archive  Batch  9 
goodseq  N/A  ⓘTags: Data Structures goodseq  Dunjudge Archive  Batch  42 
ballsofbuma  N/A  ⓘTags: Adhoc Balls of Buma  Dunjudge Archive  Batch  5 
ispit  N/A  ⓘTags: Adhoc ispit  COCI 2018/2019  Batch  2 
mathtest  N/A  ⓘTags: Implementation Cancer, Math, Syntax mathtest  Dunjudge Archive  Batch  15 
network2  N/A  ⓘTags: Data Structures, Explicitly Excluded (from IOI), Graph Theory, Trees network  Dunjudge Archive  Batch  1 
repairs  N/A  ⓘTags: Data Structures, Explicitly Excluded (from IOI), Graph Theory, Trees repairs  Dunjudge Archive  Batch  2 
grassplant  N/A  ⓘTags: Data Structures, Explicitly Excluded (from IOI), Graph Theory, Trees Grass Planting  Dunjudge Archive  Batch  7 
cowland  N/A  ⓘTags: Data Structures, Explicitly Excluded (from IOI), Graph Theory, Trees Cow Land  USACO 2019 February Contest, Gold  Batch  4 
foodchain  N/A  ⓘTags: Math, Syntax Food Chain  Dec Trg 2019 (Elementary)  Batch  98 
rating  N/A  ⓘTags: Adhoc, Math Rating Changes  Dec Trg 2019 (Elementary)  Batch  13 
cross  N/A  ⓘTags: Dynamic Programming Cross  Dunjudge Archive  Batch  2 
trespasser  N/A  ⓘTags: Bitmask, Implementation Cancer, Information Theory ADVANCED Trespasser  2019 IOI Problem Setter Contest (bensonlzl)  Interactive  1 
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, Explicitly Excluded (from IOI), Graph Theory, Trees Grapevine  NOI 2022 Finals  Batch  8 
towers_noi  N/A  ⓘTags: Constructive Algorithms, Data Structures, Greedy Towers  NOI 2022 Finals  Batch  10 
gymbadges  N/A  ⓘTags: Dynamic Programming, Greedy Gym Badges  NOI 2022 Finals  Batch  23 
votingcities  N/A  ⓘTags: Bitmask, Graph Theory Voting Cities  NOI 2022 Finals  Batch  23 
rarkids  N/A  ⓘTags: Constructive Algorithms, Math rarkids  IOI Sparring 2018 SGP  Interactive  1 
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: Implementation Cancer Wheel of Misfortune  IOI 2020 Practice Session  Batch  1 
cakeatstake  N/A  ⓘTags: Data Structures, Implementation Cancer Cake at Stake  IOI 2020 Practice Session  Batch  2 
triumvirate  N/A  ⓘTags: Dynamic Programming Triumvirate  IOI 2020 Practice Session  Batch  2 
cellulardata  N/A  ⓘTags: Bitmask, Dynamic Programming, Explicitly Excluded (from IOI), Implementation Cancer, Math Cellular Data  IOI 2020 Practice Session  Batch  1 
trackingtraining  N/A  ⓘTags: Graph Theory, Math Tracking Training  IOI 2020 Practice Session  Batch  2 
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, Implementation Cancer 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, Implementation Cancer 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, Implementation Cancer 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  2 
generosity  N/A  ⓘTags: Joke Generosity  April Fools' 2022 (oolimry)  Batch  93 
alphabrackets  N/A  ⓘTags: Data Structures, Dynamic Programming alphabrackets  Dec Course Final Contest 2017  Batch  2 
luckynumbers2  N/A  ⓘTags: Math luckynumbers2  Dec Course Final Contest 2017  Batch  23 
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  3 
builderswand  N/A  ⓘTags: Dynamic Programming Builder’s Wand  HCI NOI Selection Test 2017  Batch  1 
mooshroomfarm  N/A  ⓘTags: Data Structures, Implementation Cancer Mooshroom Farm  HCI NOI Selection Test 2017  Batch  1 
redstonelamps  N/A  ⓘTags: Explicitly Excluded (from IOI), Implementation Cancer, Math Redstone Lamps  HCI NOI Selection Test 2017  Batch  1 
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  3 
lost  N/A  ⓘTags: Bitmask, Information Theory Jianzhi’s Lost  RI NOI Selection Test 2017  Interactive  1 
clipboard  N/A  ⓘTags: Adhoc, Data Structures Jianzhi’s Clipboard Sorting  RI NOI Selection Test 2017  Batch  2 
mushroomfarm  N/A  ⓘTags: Binary Search, Dynamic Programming Jianzhi’s Mushroom Farm  RI NOI Selection Test 2017  Batch  8 
spiraldance  N/A  ⓘTags: Adhoc, Math Estelle’s Spiral Dance  RIHCI NOI Selection Test 2018  Batch  1 
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  2 
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, Implementation Cancer Crab  NUSH NOI Selection Test 2018  Batch  1 
secret_mco  N/A  ⓘTags: Adhoc Secret  MCO 2015  Batch  2 
penghulu  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Penghulu  MCO 2016  Batch  3 
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  7 
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  21 
harvest  N/A  ⓘTags: Data Structures, Implementation Cancer Harvest  JOI 2019/2020  Batch  2 
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  47 
dragonfly  N/A  ⓘTags: Data Structures, Graph Theory, Trees dragonfly  NOI 2022 Qualification (bensonlzl)  Batch  11 
treecutting  N/A  ⓘTags: Brute Force, Graph Theory, Trees Tree Cutting  NOI 2022 Qualification  Batch  25 
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  43 
usefft1  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Use FFT 1  Classic Problem  Batch  4 
stoningame  N/A  ⓘTags: Math stoningame  Valentine's Day Contest 2022 (maomao90)  Batch  10 
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  3 
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  8 
taxes  N/A  ⓘTags: Data Structures, Dynamic Programming, Square Root Decomposition taxes  December Course 2018 Advanced Final Contest  Batch  2 
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  6 
snakecode  N/A  ⓘTags: Dynamic Programming snakecode  Dunjudge Archive  Interactive  3 
colour  N/A  ⓘTags: Data Structures colour  Dunjudge Archive  Batch  3 
bunchlocks  N/A  ⓘTags: Graph Theory bunchlocks  Dunjudge Archive  Batch  4 
dateornot  N/A  ⓘTags: Binary Search, Information Theory Date Or Not?  Dunjudge Archive  Interactive  3 
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  3 
globalwarming_ex  N/A  ⓘTags: Data Structures, Graph Theory globalwarming_ex  Dunjudge Archive  Batch  4 
climatechange  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming climatechange  Dunjudge Archive  Batch  4 
notebook  N/A  ⓘTags: Graph Theory notebook  Dunjudge Archive  Batch  6 
ratar  N/A  ⓘTags: Brute Force, Dynamic Programming ratar  COCI 2013/2014  Batch  4 
morepaths  N/A  ⓘTags: Dynamic Programming morepaths  Dunjudge Archive  Batch  2 
dquery  N/A  ⓘTags: Data Structures, Square Root Decomposition dquery  Classic Problem  Batch  28 
hipercijevi  N/A  ⓘTags: Graph Theory hipercijevi  COCI 2012/2013  Batch  5 
math  N/A  ⓘTags: Brute Force, Math Primes Up  April Fools Contest 2020 (shenxy13)  Batch  6 
4cuts  N/A  ⓘTags: Adhoc, Brute Force 4cuts  Dunjudge Archive  Batch  3 
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  5 
nutritionist  N/A  ⓘTags: Data Structures nutritionist  Dunjudge Archive  Batch  2 
bore  N/A  ⓘTags: Brute Force Boring  Dunjudge Archive  Batch  3 
subwaytrip  N/A  ⓘTags: Graph Theory subwaytrip  Dunjudge Archive  Batch  2 
compact  N/A  ⓘTags: Data Structures, Dynamic Programming compact  Dunjudge Archive  Batch  6 
trianglesum  N/A  ⓘTags: Brute Force, Dynamic Programming trianglesum  NOI 2010 Selection Test  Batch  2 
mrbeancurd  N/A  ⓘTags: Dynamic Programming mrbeancurd  HCI Be A Problem Setter (BAPS) Contest 2017  Batch  5 
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  3 
rect  N/A  ⓘTags: Brute Force, Data Structures Rectangle  IOI 2019 (Day 1)  Interactive  2 
shoes  N/A  ⓘTags: Data Structures, Greedy Arranging Shoes  IOI 2019 (Day 1)  Interactive  4 
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  7 
inequality3  N/A  ⓘTags: Data Structures Social Inequality  TOKI Open 2014  Batch  7 
rolling  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Rolling  Dunjudge Archive  Batch  23 
triusis  N/A  ⓘTags: Data Structures, Dynamic Programming Rabbit Carrot  Lithuanian Olympiad in Informatics 2019  Batch  21 
subtaskstitching  N/A  ⓘTags: Joke subtaskstitching  Codebreaker Development  Batch  124 
secret  N/A  ⓘTags: Divide and Conquer, Information Theory Secret  JOI Open 2014  Interactive  9 
grazing  N/A  ⓘTags: Bitmask, Brute Force, Graph Theory grazing  USACO Bronze Jan 2012  Batch  2 
wallisstop  N/A  ⓘTags: Binary Search, Data Structures, Graph Theory Wall Is Stop  Dunjudge Archive (bensonlzl)  Batch  4 
youngmaids  N/A  ⓘTags: Data Structures youngmaids  Dunjudge Archive  Batch  3 
toy  N/A  ⓘTags: Graph Theory, Trees toy  ROI 2014  Batch  3 
stations  N/A  ⓘTags: Graph Theory, Information Theory, Trees Stations  IOI 2020 (Day 2)  Communication  6 
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  12 
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  5 
qualitycontrol  N/A  ⓘTags: Graph Theory, Trees Quality Control  Educational Round 10 (Goodbye cstuart and kai824) (cstuart)  Batch  6 
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  18 
eexploration  N/A  ⓘTags: Graph Theory Elementary Exploration  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  24 
eeducation  N/A  ⓘTags: Syntax Elementary Education  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  124 
eevacuation  N/A  ⓘTags: Dynamic Programming, Graph Theory Elementary Evacuation  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  64 
eescapism  N/A  ⓘTags: Adhoc, Math Elementary Escapism  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  89 
eelimination  N/A  ⓘTags: Data Structures Elementary Elimination  Dec Course 2021 Elementary Final Contest (shenxy13)  Batch  90 
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  20 
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  16 
more_lca2  N/A  ⓘTags: Graph Theory, Trees More LCA 2  Educational Round 10 (Goodbye cstuart and kai824) (cstuart)  Interactive  12 
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  32 
rabbitbars  N/A  ⓘTags: Binary Search, Data Structures, Divide and Conquer, Dynamic Programming rabbitbars  Dunjudge Archive (bensonlzl)  Batch  14 
queuestack  N/A  ⓘTags: Adhoc, Data Structures Queuestack  Educational Round 10 (Goodbye cstuart and kai824) (lida, oolimry, cstuart)  Batch  4 
addition2  N/A  ⓘTags: Joke Addition?  Hello 2022 (oolimry)  Batch  173 
helloworld2  N/A  ⓘTags: Joke Hello World?  Hello 2022 (jamessng)  Batch  106 
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  4 
pawns  N/A  ⓘTags: Adhoc, Explicitly Excluded (from IOI), Math e4e5 Ke2?  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  4 
doubleflip  N/A  ⓘTags: Adhoc Double Flip  TROC 24 (errorgorn)  Batch  16 
singleflip  N/A  ⓘTags: Syntax Single Flip  TROC 24 (maomao90)  Batch  40 
newlottery  N/A  ⓘTags: Dynamic Programming New Lottery  Google Code Jam 2014  Batch  3 
domine  N/A  ⓘTags: Bitmask, Dynamic Programming domine  COCI 2013/2014  Batch  7 
boxoffice  N/A  ⓘTags: Brute Force, Data Structures, Implementation Cancer Box Office  Dunjudge Archive  Batch  2 
more_lca  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees More LCA  Educational Round 10 (Goodbye cstuart and kai824) (cstuart)  Interactive  14 
weightedguess  N/A  ⓘTags: Dynamic Programming Weighted Guess  Educational Round 10 (Goodbye cstuart and kai824) (cstuart)  Interactive  8 
power  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees power  JOI  Batch  17 
mergers  N/A  ⓘTags: Adhoc, Data Structures, Graph Theory, Trees mergers  JOI  Batch  11 
wandering  N/A  ⓘTags: Data Structures, Graph Theory, Trees wandering  AGC 029  Batch  7 
hoofpaperscissor  N/A  ⓘTags: Dynamic Programming Hoof, Paper, Scissors  USACO 2017 January Contest, Gold  Batch  33 
grid  N/A  ⓘTags: Dynamic Programming Grid  Atcoder Educational DP Contest  Batch  85 
pythonindentation  N/A  ⓘTags: Dynamic Programming pythonindentation  Codeforces 909C  Batch  26 
straight  N/A  ⓘTags: Bitmask, Dynamic Programming Pure Straight  ARC 126  Batch  10 
digitsum  N/A  ⓘTags: Dynamic Programming digitsum  UOJ Easy Round #4  Batch  8 
peddler  N/A  ⓘTags: Dynamic Programming, Graph Theory Peddler  ABC 188  Batch  43 
bank  N/A  ⓘTags: Bitmask, Dynamic Programming Bank  IZhO 2014 Day 1  Batch  25 
01knapsack  N/A  ⓘTags: Dynamic Programming 01 Knapsack  Classic problem (Atcoder Educational DP Contest)  Batch  103 
voting  N/A  ⓘTags: Data Structures, Greedy Voting  Dunjudge Archive  Batch  4 
leave  N/A  ⓘTags: Data Structures leave  Dunjudge Archive  Batch  62 
guessqueue  N/A  ⓘTags: Brute Force, Data Structures Guess the Queue  Kattis (modified) (ryangohca)  Batch  52 
woodcutter  N/A  ⓘTags: Brute Force, Data Structures Woodcutter  Codeforces 527C (modified)  Interactive  12 
sandwich  N/A  ⓘTags: Divide and Conquer, Implementation Cancer 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  17 
jumper  N/A  ⓘTags: Brute Force, Data Structures, Line Sweep/Sliding Window Manhattan Jumper  HCINUSH NOI Selection 2022 (errorgorn)  Batch  17 
boundedpermutation  N/A  ⓘTags: Adhoc, Dynamic Programming, Math Bounded Permutation  HCINUSH NOI Selection 2022 (maomao90)  Batch  47 
flappyrabbit  N/A  ⓘTags: Greedy Flappy Rabbit  HCINUSH NOI Selection 2022 (pavement)  Interactive  59 
727  N/A  ⓘTags: Greedy, Math 727  HCINUSH NOI Selection 2022 (errorgorn)  Batch  68 
uniquepath  N/A  ⓘTags: Graph Theory uniquepath  AGC38D  Batch  9 
spy  N/A  ⓘTags: Data Structures, Graph Theory, Trees spy  2013 IOI Japan National Team Selection Test Day 2  Batch  15 
bosses  N/A  ⓘTags: Brute Force, Graph Theory, Greedy, Trees bosses  BOI 2016  Batch  40 
roots  N/A  ⓘTags: Data Structures, Graph Theory, Trees roots  Codeforces 695E  Batch  10 
typicalstairs  N/A  ⓘTags: Dynamic Programming Typical Stairs  ABC 129  Batch  85 
vainish  N/A  ⓘTags: Dynamic Programming Vanish  20152016 NOI Training Diagnostic Test  Batch  49 
postcard  N/A  ⓘTags: Dynamic Programming postcard  Codeforces 4D  Batch  21 
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  56 
partitiongame  N/A  ⓘTags: Data Structures, Dynamic Programming Partition Game  Codeforces 1527E  Batch  20 
stringsofimpurity  N/A  ⓘTags: Binary Search stringsofimpurity  AtCoder  Batch  22 
logs  N/A  ⓘTags: Binary Search logs  AtCoder  Batch  46 
snukethewizard  N/A  ⓘTags: Adhoc, Binary Search snukethewizard  AtCoder  Batch  8 
potatoqueue  N/A  ⓘTags: Data Structures potatoqueue  Dunjudge Archive  Interactive  15 
minstack  N/A  ⓘTags: Data Structures minstack  Dunjudge Archive  Interactive  68 
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  49 
cp2booksales  N/A  ⓘTags: Line Sweep/Sliding Window cp2booksales  Dunjudge Archive  Batch  10 
sale  N/A  ⓘTags: Data Structures, Greedy sale  Dunjudge Archive  Batch  5 
brackets  N/A  ⓘTags: Greedy, Slope Trick Bracket Subsequence  Classic Problem (zengminghao)  Batch  29 
travel  N/A  ⓘTags: Greedy Travel  CCO 2015  Batch  42 
relutree  N/A  ⓘTags: Data Structures relutree  Classic Problem (errorgorn)  Batch  5 
hacking  N/A  ⓘTags: Graph Theory Hacking  Classic problem (fyss006)  Batch  53 
hamster1  N/A  ⓘTags: Dynamic Programming Hamster's Journey  Atcoder Educational DP Contest  Batch  70 
fractions  N/A  ⓘTags: Syntax fractions  Classic Problem (YeoBL20)  Batch  97 
medianstring  N/A  ⓘTags: Syntax medianstring  Dunjudge Archive  Batch  215 
descsort  N/A  ⓘTags: Syntax descsort  Dunjudge Archive  Batch  210 
xortree  N/A  ⓘTags: Data Structures xortree  Classic Problem (errorgorn)  Batch  8 
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  26 
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  37 
picnic  N/A  ⓘTags: Binary Search, Greedy Picnic  Codeforces Global Round 17  Batch  48 
management  N/A  ⓘTags: Syntax Management  ABC163C  Batch  147 
gotoschool  N/A  ⓘTags: Syntax Go To School  ABC142  Batch  210 
typo  N/A  ⓘTags: Syntax Typo  ABC221  Batch  189 
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  40 
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  26 
distribution  N/A  ⓘTags: Bitmask, Constructive Algorithms, Meet in the Middle Distribution  Codechef January CookOff 2021  Batch  12 
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  64 
zooqueue  N/A  ⓘTags: Data Structures Zoo Queue  NUS December Training 2021 Diagnostic Test (shenxy13)  Batch  77 
workload  N/A  ⓘTags: Dynamic Programming December Training Workload  Classic Problem  Batch  80 
fizzbuzz  N/A  ⓘTags: Math, Syntax FizzBuzz  Classic Problem  Batch  411 
aircon  N/A  ⓘTags: Data Structures aircon  Codeforces Round #757 (Div. 2)  Batch  30 
cups  N/A  ⓘTags: Data Structures cups  Deccourse 2021 DS II Contest (errorgorn)  Batch  102 
lambsrespite  N/A  ⓘTags: Data Structures Lamb's Respite  XXII Open Cup. Grand Prix of Korea  Batch  9 
digits  N/A  ⓘTags: Data Structures digits  Deccourse 2021 DS II Contest (errorgorn)  Batch  48 
wall  N/A  ⓘTags: Data Structures wall  IOI 2014  Interactive  11 
rabbitpainting  N/A  ⓘTags: Greedy rabbitpainting  Dunjudge Archive (bensonlzl)  Batch  19 
vouchers  N/A  ⓘTags: Dynamic Programming vouchers  Dunjudge Archive  Batch  18 
lps  N/A  ⓘTags: Dynamic Programming lps  Dunjudge Archive  Batch  34 
entropy2  N/A  ⓘTags: Adhoc, Brute Force entropy2  RI December Course Selection Test 2021 (kym)  Batch  54 
feedthewallabies  N/A  ⓘTags: Graph Theory Feed the Wallabies  RI December Course Selection Test 2021 (syy)  Batch  29 
clocktower  N/A  ⓘTags: Math, Syntax Clock Tower  RI December Course Selection Test 2021 (Deadeye)  Batch  123 
pillars  N/A  ⓘTags: Data Structures Pillars  RI December Course Selection Test 2021 (rs)  Batch  20 
wallabyhop  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window Wallaby Hop  RI December Course Selection Test 2021 (jiahng)  Batch  26 
summarizing2021  N/A  ⓘTags: Explicitly Excluded (from IOI) 🗿🗿🗿  Hello 2022 (errorgorn)  Interactive  14 
wabbitosu  N/A  ⓘTags: Adhoc, Data Structures, Greedy Wabbit osu!taiko  HCI December Course Selection 2021 (bensonlzl)  Batch  15 
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  51 
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  137 
reciprocals  N/A  ⓘTags: Constructive Algorithms, Syntax Reciprocals  HCI December Course Selection 2021 (huangqr, pavement)  Batch  107 
ladybugs  N/A  ⓘTags: Dynamic Programming ladybugs  Dunjudge Archive  Batch  40 
letters  N/A  ⓘTags: Dynamic Programming letters  Dunjudge Archive  Batch  61 
lol  N/A  ⓘTags: Dynamic Programming lol  Dunjudge Archive  Batch  65 
becomingred  N/A  ⓘTags: Joke Becoming Red ඞ ඞ ඞ  Hello 2022 (oolimry)  Batch  42 
exoticplants  N/A  ⓘTags: Graph Theory Exotic Plants  Luogu P4568 [JLOI2011]  Batch  17 
razlika  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window razlika  Dunjudge Archive  Batch  67 
prefixsums  N/A  ⓘTags: Dynamic Programming, Syntax prefixsums  Classic Problem (YeoBL20)  Batch  235 
equals  N/A  ⓘTags: Graph Theory equals  ARC 097  Batch  15 
kthsubstring  N/A  ⓘTags: Adhoc kthsubstring  ARC 097  Batch  10 
dominoes  N/A  ⓘTags: Binary Search, Data Structures, Square Root Decomposition dominoes  Educational Round 9 (maomao90, zaneyu)  Batch  6 
binomial  N/A  ⓘTags: Math binomial  Dunjudge Archive  Batch  19 
boxes_hkicpc  N/A  ⓘTags: Graph Theory, Trees Boxes  2016 ACM ICPC Asia Hong Kong Regional  Batch  21 
hunter  N/A  ⓘTags: Graph Theory, Trees Hunter  Dunjudge Archive (bensonlzl)  Interactive  11 
closedrooms  N/A  ⓘTags: Adhoc, Graph Theory closedrooms  AtCoder Grand Contest 014  Batch  31 
gridgame  N/A  ⓘTags: Graph Theory gridgame  Dunjudge Archive  Batch  33 
fireandbeary  N/A  ⓘTags: Graph Theory fireandbeary  Dunjudge Archive (jamielim)  Batch  52 
workoutplan  N/A  ⓘTags: Greedy Workout plan  Bubble Cup 12 Div 1  Batch  61 
primesort  N/A  ⓘTags: Graph Theory, Math Prime Sort  Dunjudge Archive  Batch  30 
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  60 
boring  N/A  ⓘTags: Dynamic Programming boring  Dunjudge Archive  Batch  14 
area  N/A  ⓘTags: Syntax area  Dunjudge Archive  Batch  181 
solonim  N/A  ⓘTags: Math, Syntax Solo Nim  Dunjudge Archive  Batch  74 
sardines  N/A  ⓘTags: Data Structures, Dynamic Programming sardines  RI NOI Selection Test 2014  Batch  7 
deliveroo  N/A  ⓘTags: Data Structures, Greedy Deliveroo  RI November Course Stage 2 Selection Test 2021 (Deadeye)  Batch  23 
levelingup  N/A  ⓘTags: Dynamic Programming Leveling Up  RI November Course Stage 2 Selection Test 2021 (ryangohca)  Batch  51 
greenbeans  N/A  ⓘTags: Adhoc, Implementation Cancer, Math, Syntax Green Beans Mayhem  RI November Course Stage 2 Selection Test 2021 (ryangohca, kym)  Batch  49 
coinjourney  N/A  ⓘTags: Binary Search Coin Journey  RI November Course Stage 2 Selection Test 2021 (kym)  Batch  63 
timeexam  N/A  ⓘTags: Math, Syntax What's the Time?  RI November Course Stage 2 Selection Test 2021 (ryangohca)  Batch  282 
duels  N/A  ⓘTags: Adhoc, Data Structures duels  Educational Round 9 (maomao90, jamessng)  Batch  12 
orangeroad  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window orangeroad  Educational Round 9 (jamessng, jamielim)  Batch  12 
portals  N/A  ⓘTags: Data Structures, Graph Theory portals  USACO 2021 US Open, Gold  Batch  7 
holeetree  N/A  ⓘTags: Explicitly Excluded (from IOI) \( H^{o^{L^{e^e_e}_{e^e_e}}_{L^{e^e_e}_{ e^e_e}}}_{o^{L^{e^e_e}_{ e^e_e}}_{L^{e^e_e}_{e^e_e}}} \) 🎄  Hello 2022 (errorgorn)  Batch  3 
spellofweakness  N/A  ⓘTags: Binary Search, Greedy, Line Sweep/Sliding Window Spell Of Weakness  Dunjudge Archive (dantoh)  Batch  67 
bananasmoothie  N/A  ⓘTags: Greedy Banana Smoothie  Dunjudge Archive (shenxy13)  Batch  101 
adjacentswaps  N/A  ⓘTags: Brute Force, Greedy Adjacent Swaps  Dunjudge Archive (shenxy13)  Batch  23 
jedan  N/A  ⓘTags: Dynamic Programming jedan  COCI 2012/2013  Batch  4 
stones  N/A  ⓘTags: Graph Theory, Trees stones  Dunjudge Archive  Batch  33 
hyperoperations  N/A  ⓘTags: Math hyperoperations  Dunjudge Archive  Batch  3 
pigeons  N/A  ⓘTags: Brute Force pigeons  Classic Problem  Batch  216 
diamond  N/A  ⓘTags: Syntax diamond  Classic Problem  Batch  223 
psle  N/A  ⓘTags: Syntax Old PSLE Grading System  Classic Problem  Batch  441 
3nplus1II  N/A  ⓘTags: Syntax 3nplus1II  Classic Problem  Batch  252 
3nplus1  N/A  ⓘTags: Syntax 3nplus1  Classic Problem  Batch  493 
rightangtri  N/A  ⓘTags: Syntax rightangtri  Classic Problem  Batch  367 
evenorodd  N/A  ⓘTags: Syntax evenorodd  Classic Problem  Batch  437 
boxhaskey  N/A  ⓘTags: Graph Theory Box Has Key  HCIRI 2020 May Contest (bensonlzl)  Batch  3 
rainbowroad  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory, Trees Rainbow Road  HCIRI 2020 May Contest (bensonlzl)  Batch  4 
pressstart  N/A  ⓘTags: Data Structures, Graph Theory Press Start!  HCIRI 2020 May Contest (bensonlzl)  Batch  8 
bracketsyndrome  N/A  ⓘTags: Adhoc, Data Structures Bracket Syndrome  RIHCI NOI Selection Test 2019  Batch  75 
destroy  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Destroy  RIHCI NOI Selection Test 2019  Batch  5 
wires  N/A  ⓘTags: Adhoc Wires  RIHCI NOI Selection Test 2019 (bensonlzl)  Interactive  9 
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, Implementation Cancer Consistency  RIHCI NOI Selection Test 2019 (bensonlzl)  Batch  1 
rainbowrabbit  N/A  ⓘTags: Adhoc, Greedy rainbowrabbit  RIHCI December Course Selection 2019 (bensonlzl)  Batch  37 
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  12 
escalation  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees escalation  RIHCI December Course Selection 2019 (bensonlzl)  Batch  3 
circleselection  N/A  ⓘTags: Data Structures, Math Circle selection  APIO 2018  Batch  6 
duathlon  N/A  ⓘTags: Graph Theory, Trees Duathlon  APIO 2018  Batch  5 
f7  N/A  ⓘTags: Greedy F7  COCI 2012/2013  Batch  68 
forensic  N/A  ⓘTags: Brute Force, Graph Theory forensic  NOI 2012  Batch  2 
modsum  N/A  ⓘTags: Dynamic Programming, Math modsum  NOI 2012  Batch  28 
diesel  N/A  ⓘTags: Dynamic Programming, Graph Theory diesel  NOI 2013  Batch  2 
obelisk  N/A  ⓘTags: Graph Theory obelisk  NOI 2014  Batch  1 
cats  N/A  ⓘTags: Adhoc cats  NOI 2014  Batch  1 
island  N/A  ⓘTags: Graph Theory, Math Island  NOI 2018 Prelims  Batch  9 
snail  N/A  ⓘTags: Adhoc, Implementation Cancer, Syntax Snail  NOI 2018 Prelims  Batch  15 
robot  N/A  ⓘTags: Data Structures Robots  Educational Round 8 (Goodbye oolimry) (oolimry)  Batch  8 
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  11 
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  4 
potionshard  N/A  ⓘTags: Greedy Potions (Hard Version)  Codeforces Round 723 (errorgorn, oolimry)  Batch  22 
potionseasy  N/A  ⓘTags: Dynamic Programming, Greedy Potions (Easy Version)  Codeforces Round 723 (errorgorn, oolimry)  Batch  24 
ihate1111  N/A  ⓘTags: Adhoc, Math I Hate 1111  Codeforces Round 723 (errorgorn)  Batch  43 
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  4 
ruler  N/A  ⓘTags: Brute Force, Data Structures, Implementation Cancer Ruler Of The Zoo  Educational Round 8 (Goodbye oolimry) (oolimry)  Batch  2 
pekora  N/A  ⓘTags: Greedy Pekora and Trampoline  Educational Round 8 (Goodbye oolimry) (oolimry)  Batch  8 
palindromicfizzbuzz  N/A  ⓘTags: Syntax Palindromic FizzBuzz  NOI 2019 Prelims  Batch  80 
lostarray  N/A  ⓘTags: Adhoc, Constructive Algorithms Lost Array  NOI 2019 Prelims  Batch  49 
squarerect  N/A  ⓘTags: Adhoc, Information Theory Square or Rectangle?  NOI 2019 Prelims  Interactive  4 
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  8 
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  4 
trivialmaths2  N/A  ⓘTags: Explicitly Excluded (from IOI), Math trivialmaths2 (EE)  Educational Round 7 (errorgorn)  Batch  4 
oridance  N/A  ⓘTags: Dynamic Programming Orientation Dance  Codeforces 1509C  Batch  47 
addone  N/A  ⓘTags: Dynamic Programming Add One  Codeforces 1513C  Batch  24 
switches  N/A  ⓘTags: Explicitly Excluded (from IOI), Math switches  Educational Round 7 (myrcella, errorgorn)  Batch  3 
bosubaiko  N/A  ⓘTags: Adhoc, Greedy Bosu Baiko  Educational Round 6 (errorgorn)  Batch  24 
robobear  N/A  ⓘTags: Graph Theory The Maze of RoboBear  Tuymaada 2021  Batch  14 
findandprevent  N/A  ⓘTags: Graph Theory, Trees Find and Prevent  Tuymaada 2021  Batch  15 
judgeantibreaker  N/A  ⓘTags: Binary Search, Square Root Decomposition judgeantibreaker  Educational Round 6 (oolimry)  Batch  7 
fourbuckets  N/A  ⓘTags: Adhoc, Math Four Buckets  Educational Round 6 (oolimry)  Batch  19 
persistentlists  N/A  ⓘTags: Binary Search, Data Structures, Square Root Decomposition Persistent Lists  Educational Round 6 (oolimry)  Batch  4 
hellokitty  N/A  ⓘTags: Binary Search, Data Structures, Math hellokitty  Dunjudge Archive  Batch  15 
cudak  N/A  ⓘTags: Binary Search, Dynamic Programming cudak  COCI 2007/2008  Batch  21 
routes  N/A  ⓘTags: Adhoc, Graph Theory routes  Dunjudge Archive  Batch  10 
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  4 
burger  N/A  ⓘTags: Greedy burger  Code Jam to I/O 2018 for Women  Batch  14 
toblerone  N/A  ⓘTags: Brute Force, Dynamic Programming, Greedy toblerone  HCI Mock NOI 2015  Batch  8 
twomeals  N/A  ⓘTags: Brute Force, Dynamic Programming, Greedy twomeals  Dunjudge Archive  Batch  106 
badnim  N/A  ⓘTags: Explicitly Excluded (from IOI), Math badnim  Educational Round 7 (errorgorn)  Batch  29 
pancake  N/A  ⓘTags: Brute Force, Graph Theory pancake  NOI 2012  Batch  17 
switches2  N/A  ⓘTags: Dynamic Programming, Math switches2  Educational Round 7 (errorgorn)  Batch  5 
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  19 
productcounting  N/A  ⓘTags: Divide and Conquer, Square Root Decomposition Product Counting  Educational Round 5 (errorgorn)  Batch  4 
lottery  N/A  ⓘTags: Adhoc Lottery  CEOI 2018  Batch  2 
cloudcomputing  N/A  ⓘTags: Dynamic Programming Cloud computing  CEOI 2018  Batch  12 
mandarins  N/A  ⓘTags: Math Mandarins  2020 CNY  Batch  48 
friendcross  N/A  ⓘTags: Data Structures friendcross  USACO 2017 Feb Plat  Batch  1 
supplies  N/A  ⓘTags: Graph Theory supplies  Dunjudge Archive  Batch  59 
knightmoves  N/A  ⓘTags: Graph Theory knightmoves  Dunjudge Archive  Batch  79 
mining  N/A  ⓘTags: Graph Theory mining  Dunjudge Archive  Batch  15 
erp  N/A  ⓘTags: Graph Theory erp  Dunjudge Archive  Batch  51 
heatwv  N/A  ⓘTags: Graph Theory Heat Wave  Dunjudge Archive  Batch  68 
party  N/A  ⓘTags: Data Structures, Graph Theory party  Dunjudge Archive  Batch  107 
marathon_usaco  N/A  ⓘTags: Data Structures Marathon  USACO 2014 Dec, Gold  Batch  3 
schedule  N/A  ⓘTags: Dynamic Programming, Graph Theory schedule  HCI NOI Selection Test 2014  Batch  10 
streets  N/A  ⓘTags: Data Structures, Graph Theory, Implementation Cancer, Trees OneWay Streets  CEOI 2017  Batch  4 
friend  N/A  ⓘTags: Adhoc friend  IOI 2014  Interactive  3 
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  39 
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  3 
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  7 
elephants  N/A  ⓘTags: Binary Search, Square Root Decomposition Elephants  IOI 2011  Interactive  4 
newhome  N/A  ⓘTags: Divide and Conquer, Implementation Cancer, 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  5 
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, Implementation Cancer, 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  9 
minimum  N/A  ⓘTags: Syntax minimum  Classic Problem  Interactive  322 
indivisibility  N/A  ⓘTags: Math indivisibility  Dunjudge Archive  Batch  23 
thanossort_st4  N/A  ⓘTags: Adhoc, Divide and Conquer, Explicitly Excluded (from IOI) thanossort_st4  RSA Fun Contest (errorgorn)  Interactive  7 
thanossort  N/A  ⓘTags: Adhoc, Divide and Conquer thanossort  RSA Fun Contest (errorgorn)  Interactive  9 
fireworks  N/A  ⓘTags: Dynamic Programming, Graph Theory, Slope Trick, Trees Fireworks  APIO 2016  Batch  6 
warp  N/A  ⓘTags: Bitmask, Dynamic Programming warp  HCI NOI Selection Retest 2020 (bensonlzl)  Batch  26 
skyline  N/A  ⓘTags: Graph Theory, Greedy skyline  HCI NOI Selection Retest 2020 (bensonlzl)  Batch  28 
colourblind  N/A  ⓘTags: Graph Theory colourblind  HCI NOI Selection Retest 2020 (bensonlzl)  Interactive  10 
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  18 
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  21 
rabbitbridges  N/A  ⓘTags: Binary Search, Graph Theory Rabbit Bridges  Educational Round 5 (oolimry)  Batch  9 
powersupply  N/A  ⓘTags: Adhoc, Data Structures, Line Sweep/Sliding Window, Math Power Supply  Educational Round 5 (cstuart)  Batch  2 
lfs  N/A  ⓘTags: Dynamic Programming, Math Longest Factor Subsequence  Educational Round 5 (errorgorn)  Batch  26 
funfair  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Funfair  Educational Round 5 (rs)  Batch  15 
supertrees  N/A  ⓘTags: Adhoc, Constructive Algorithms, Graph Theory Connecting Supertrees  IOI 2020  Interactive  11 
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  9 
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  24 
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  2 
dreaming  N/A  ⓘTags: Graph Theory dreaming  IOI 2013  Interactive  12 
animaleditor  N/A  ⓘTags: Data Structures animaleditor  MCO  Batch  6 
cave  N/A  ⓘTags: Binary Search cave  IOI 2013  Interactive  15 
leastround  N/A  ⓘTags: Dynamic Programming leastround  Codeforces 2B  Batch  5 
garden_ioi05  N/A  ⓘTags: Brute Force, Dynamic Programming Garden  IOI 2005  Batch  10 
garden_ioi08  N/A  ⓘTags: Dynamic Programming Linear Garden  IOI 2008  Batch  7 
umbrella  N/A  ⓘTags: Dynamic Programming umbrella  USACO Silver Dec 2011  Batch  14 
robots  N/A  ⓘTags: Binary Search, Greedy robots  IOI 2013  Interactive  12 
fruits  N/A  ⓘTags: Data Structures, Greedy fruits  Dunjudge Archive  Batch  20 
tourist  N/A  ⓘTags: Data Structures, Greedy tourist  IOI 2012 Practice Tasks  Batch  26 
convexhull  N/A  ⓘTags: Data Structures Convex Hull  Classic Problem (ryangohca)  Batch  31 
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  8 
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, Explicitly Excluded (from IOI), Graph Theory, Implementation Cancer, 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 rabbitplane  RI Problem Setter Contest 2019 (bensonlzl)  Batch  6 
lineup2  N/A  ⓘTags: Syntax Lineup  RI Problem Setter Contest 2019 (rs)  Batch  40 
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  76 
scrivener  N/A  ⓘTags: Data Structures Crayfish scrivener  IOI 2012  Interactive  10 
cousin  N/A  ⓘTags: Graph Theory, Trees cousin  Dunjudge Archive  Interactive  6 
candyshop  N/A  ⓘTags: Data Structures candyshop  Classic Problem  Batch  11 
construction  N/A  ⓘTags: Graph Theory, Trees Construction of Highway  JOI 2017/2018 Spring Camp  Batch  2 
jumps  N/A  ⓘTags: Data Structures, Greedy Rainforest Jumps  APIO 2021 (bensonlzl)  Interactive  14 
hexagon  N/A  ⓘTags: Graph Theory, Implementation Cancer, 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: Explicitly Excluded (from IOI), Graph Theory, Trees Gwyneth and Tree  Codeforces 199E (Div 2)  Batch  12 
chemistry  N/A  ⓘTags: Dynamic Programming, Joke chemistry  April Fools Contest 2020 (0rang3)  Batch  3 
wormholes  N/A  ⓘTags: Dynamic Programming wormholes  Dunjudge Archive  Batch  77 
istj  N/A  ⓘTags: Data Structures, Trees ISTJ  2020 CNY, Classic Problem (0rang3, shenxy13)  Batch  10 
bookshelf  N/A  ⓘTags: Data Structures bookshelf  Dunjudge Archive  Batch  38 
bombing  N/A  ⓘTags: Graph Theory bombing  Dunjudge Archive  Batch  15 
atm  N/A  ⓘTags: Graph Theory The Great ATM Robbery  APIO 2009  Batch  6 
mice  N/A  ⓘTags: Graph Theory mice  Dunjudge Archive  Batch  5 
bombing2  N/A  ⓘTags: Graph Theory bombing2  Dunjudge Archive  Batch  10 
sailor  N/A  ⓘTags: Graph Theory sailor  CPSPC 2010  Batch  10 
doodles  N/A  ⓘTags: Graph Theory, Math doodles  December Course 2019 Advanced Final Contest (rs)  Batch  4 
clockpalindrome  N/A  ⓘTags: Adhoc, Dynamic Programming clockpalindrome  December Course 2019 Advanced Final Contest  Batch  5 
hdb  N/A  ⓘTags: Data Structures, Dynamic Programming hdb  Dunjudge Archive  Batch  15 
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  10 
bubblesort  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Bubble Sort  Educational Round 4 (jamessng, zaneyu, oolimry)  Batch  10 
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  10 
sandd  N/A  ⓘTags: Binary Search sandd  Classic Problem  Interactive  83 
mugger  N/A  ⓘTags: Dynamic Programming mugger  RI Problem Setter Contest 2019 (ngmh)  Batch  16 
bridges_apio19  N/A  ⓘTags: Graph Theory, Square Root Decomposition Bridges  APIO 2019  Batch  10 
badknapsack  N/A  ⓘTags: Brute Force, Dynamic Programming badknapsack  Educational Round 3 (errorgorn)  Batch  12 
inversemax  N/A  ⓘTags: Bitmask, Dynamic Programming inversemax  Educational Round 3 (errorgorn)  Batch  22 
cheaters  N/A  ⓘTags: Explicitly Excluded (from IOI), Math cheaters  Educational Round 3 (errorgorn)  Batch  5 
fencing3  N/A  ⓘTags: Data Structures, Square Root Decomposition fencing3  Educational Round 3 (errorgorn, tqbfjotld)  Batch  3 
catalansum  N/A  ⓘTags: Explicitly Excluded (from IOI), Math catalansum (EE)  Educational Round 3 (errorgorn, oolimry)  Batch  8 
cardgame2  N/A  ⓘTags: Dynamic Programming cardgame2  Dunjudge Archive  Batch  2 
cardgame  N/A  ⓘTags: Data Structures, Dynamic Programming cardgame  Dunjudge Archive  Batch  3 
primepie  N/A  ⓘTags: Math primepie  Dunjudge Archive  Interactive  25 
orchard2  N/A  ⓘTags: Dynamic Programming orchard2  RI NOI Selection Test 2015  Batch  9 
hacker  N/A  ⓘTags: Data Structures, Greedy, Line Sweep/Sliding Window hacker  BOI 2015  Batch  11 
sawmills  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Two Sawmills  CEOI 2004  Batch  9 
scanner  N/A  ⓘTags: Dynamic Programming scanner  Dunjudge Archive  Batch  34 
jumping2  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming Jumping  Dunjudge Archive  Batch  15 
ballot  N/A  ⓘTags: Data Structures ballot  Dunjudge Archive  Batch  73 
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  4 
sequence_apio  N/A  ⓘTags: Dynamic Programming Split the sequence  APIO 2014  Batch  18 
sort  N/A  ⓘTags: Adhoc sort  Classic Problem?  Batch  70 
aliens  N/A  ⓘTags: Data Structures aliens  Dunjudge Archive  Batch  9 
GSS  N/A  ⓘTags: Greedy GSS  Dunjudge Archive  Batch  173 
scalars  N/A  ⓘTags: Greedy scalars  Dunjudge Archive  Batch  106 
chinese  N/A  ⓘTags: Syntax chinese  Dunjudge Archive  Batch  65 
potatosalad  N/A  ⓘTags: Greedy potatosalad  Classic Problem  Batch  316 
skillmoves  N/A  ⓘTags: Data Structures, Greedy skillmoves  RI November Course Stage 2 Selection Test 2019  Batch  39 
cuberoot  N/A  ⓘTags: Binary Search, Math, Syntax cuberoot  Classic Problem  Batch  240 
sudoku  N/A  ⓘTags: Constructive Algorithms, Greedy sudoku  NOI 2015  Batch  3 
shuffle  N/A  ⓘTags: Constructive Algorithms, Graph Theory, Implementation Cancer shuffle  NOI 2019  Interactive  2 
citymapping  N/A  ⓘTags: Information Theory, Trees CityMapping  NOI 2018  Interactive  4 
lampposts  N/A  ⓘTags: Binary Search lampposts  Dunjudge Archive  Interactive  5 
cards  N/A  ⓘTags: Data Structures cards  Dunjudge Archive  Batch  6 
chunlian  N/A  ⓘTags: Data Structures chunlian  Dunjudge Archive  Batch  21 
1402  N/A  ⓘTags: Adhoc, Joke 1402  April Fools' 2021 (bensonlzl)  Batch  24 
aliens_ioi  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming Aliens  IOI 2016  Interactive  7 
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  2 
escapesadland  N/A  ⓘTags: Binary Search, Graph Theory Escape Sadland  Dunjudge Archive  Batch  2 
snack  N/A  ⓘTags: Dynamic Programming, Greedy snack  Dunjudge Archive  Batch  137 
stepgame  N/A  ⓘTags: Dynamic Programming, Greedy stepgame  Classic Problem  Batch  154 
badpotato  N/A  ⓘTags: Dynamic Programming badpotato  Dunjudge Archive  Batch  83 
malcolm  N/A  ⓘTags: Line Sweep/Sliding Window malcolm  COCI 2012/2013  Batch  27 
squidzofrenzic  N/A  ⓘTags: Binary Search squidzofrenzic  Dunjudge Archive  Batch  147 
restaurant  N/A  ⓘTags: Greedy restaurant  Dunjudge Archive  Batch  37 
carpark  N/A  ⓘTags: Greedy carpark  Dunjudge Archive  Batch  122 
explosion  N/A  ⓘTags: Math explosion  Classic Problem  Batch  82 
countalp  N/A  ⓘTags: Syntax countalp  Classic Problem  Batch  128 
pigeonhole  N/A  ⓘTags: Data Structures pigeonhole  Dunjudge Archive  Batch  87 
uniquenumbers  N/A  ⓘTags: Data Structures uniquenumbers  Classic Problem  Batch  203 
reflection  N/A  ⓘTags: Constructive Algorithms, Implementation Cancer, 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  12 
harbingers  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees harbingers  CEOI 2009  Batch  6 
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  5 
1821  N/A  ⓘTags: Constructive Algorithms, Graph Theory, Joke, Trees 1821  April Fools' 2021 (zaneyu)  Batch  69 
0405  N/A  ⓘTags: Joke, Math 0405  April Fools' 2021 (zaneyu)  Batch  52 
1503  N/A  ⓘTags: Adhoc, Joke 1503  April Fools' 2021 (jamielim)  Batch  40 
pond  N/A  ⓘTags: Data Structures, Dynamic Programming, Implementation Cancer pond  NOI 2021 Finals  Batch  1 
archaeologist  N/A  ⓘTags: Adhoc archaeologist  NOI 2021 Finals  Interactive  8 
tiles  N/A  ⓘTags: Bitmask, Data Structures, Dynamic Programming tiles  NOI 2021 Finals  Batch  14 
fraud  N/A  ⓘTags: Adhoc, Math fraud  NOI 2021 Finals  Batch  39 
password  N/A  ⓘTags: Data Structures, Dynamic Programming, Greedy, Slope Trick password  NOI 2021 Finals  Batch  17 
1609  N/A  ⓘTags: Joke 1609  April Fools' 2021 (0rang3)  Batch  129 
colorgraph  N/A  ⓘTags: Graph Theory colorgraph  uwu (errorgorn)  Batch  13 
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  10 
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  4 
mememagic  N/A  ⓘTags: Dynamic Programming mememagic  Dunjudge Archive  Batch  9 
train_ex  N/A  ⓘTags: Dynamic Programming train_ex  Dunjudge Archive  Batch  24 
train  N/A  ⓘTags: Dynamic Programming train  Dunjudge archive  Batch  64 
commando  N/A  ⓘTags: Dynamic Programming commando  APIO 2010  Batch  51 
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  15 
catgameshow  N/A  ⓘTags: Data Structures catgameshow  RI/RJC NOI Selection Test 2016  Batch  10 
guards  N/A  ⓘTags: Dynamic Programming Guards  Dunjudge archive  Batch  32 
truck  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Implementation Cancer, Math, Trees truck  NOI 2021 Qualification  Batch  14 
departure  N/A  ⓘTags: Data Structures, Greedy, Implementation Cancer departure  NOI 2021 Qualification  Batch  11 
competition  N/A  ⓘTags: Greedy competition  NOI 2021 Qualification  Batch  148 
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), Implementation Cancer 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  22 
trivialmaths  N/A  ⓘTags: Explicitly Excluded (from IOI), Math trivialmaths  Valentines Contest 2021 (errorgorn)  Interactive  7 
catteams  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming catteams  RI/RJC NOI Selection Test 2016  Batch  14 
rarsum  N/A  ⓘTags: Dynamic Programming rarsum  Raffles Cat Helping Contest 2013  Batch  14 
rarwall  N/A  ⓘTags: Data Structures rarwall  Dunjudge Archive  Interactive  9 
troubles  N/A  ⓘTags: Adhoc, Data Structures, Dynamic Programming troubles  Dunjudge Archive  Batch  21 
snakesnack2  N/A  ⓘTags: Line Sweep/Sliding Window snakesnack2  RIHCINUSH NOI Selection Test 2021 (errorgorn)  Batch  25 
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  15 
bunnyscore  N/A  ⓘTags: Adhoc, Data Structures bunnyscore  RIHCINUSH NOI Selection Test 2021 (errorgorn)  Interactive  27 
armpit  N/A  ⓘTags: Adhoc armpit  RIHCINUSH NOI Selection Test 2021 (errorgorn)  Batch  31 
construct  N/A  ⓘTags: Dynamic Programming, Graph Theory Constructing Birthday Presents  RIHCINUSH NOI Selection Test 2021 (0rang3)  Batch  42 
bucketstacking  N/A  ⓘTags: Adhoc, Greedy Bucket Stacking  RIHCINUSH NOI Selection Test 2021 (oolimry)  Batch  22 
swimming  N/A  ⓘTags: Graph Theory Constructing a Swimming Pool  RIHCINUSH NOI Selection Test 2021 (0rang3)  Batch  32 
wabbit  N/A  ⓘTags: Greedy wabbit  RIHCINUSH NOI Selection Test 2021 (oolimry)  Batch  64 
fencing  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window, Square Root Decomposition fencing  RIHCINUSH NOI Selection Test 2021 (errorgorn)  Batch  20 
magick  N/A  ⓘTags: Adhoc, Information Theory, Math Magick  RIHCI NOI Selection Test 2019  Communication  9 
combo  N/A  ⓘTags: Adhoc Combo  IOI 2018  Interactive  18 
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  16 
summarising2020  N/A  ⓘTags: Information Theory, Joke Summarising 2020  Hello 2021 (shenxy13)  Interactive  48 
hashcollision  N/A  ⓘTags: Joke Hash Collision  Hello 2021 (shenxy13)  Interactive  84 
samelength  N/A  ⓘTags: Joke Same Length  Hello 2021 (errorgorn)  Batch  43 
holdinghands  N/A  ⓘTags: Graph Theory, Implementation Cancer, 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  44 
dna  N/A  ⓘTags: Dynamic Programming DNA  APIO 2008  Batch  16 
girlfriend  N/A  ⓘTags: Dynamic Programming, Graph Theory girlfriend  Dunjudge Archive  Batch  26 
tour  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory tour  NOI 2011  Batch  23 
variety  N/A  ⓘTags: Dynamic Programming variety  RI November Course Stage 2 Selection Test 2019  Batch  45 
appletree  N/A  ⓘTags: Graph Theory appletree  Dunjudge Archive  Batch  18 
bananafever  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees bananafever  Dunjudge Archive  Batch  16 
delivery  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory delivery  Dunjudge Archive  Batch  13 
graphcraft  N/A  ⓘTags: Graph Theory graphcraft  Dunjudge Archive  Interactive  47 
numbers  N/A  ⓘTags: Dynamic Programming PalindromeFree Numbers  BOI 2013  Batch  28 
assembly  N/A  ⓘTags: Dynamic Programming assembly  Dunjudge Archive  Batch  70 
lazycat  N/A  ⓘTags: Bitmask, Dynamic Programming, Graph Theory lazycat  Dunjudge Archive  Batch  24 
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  54 
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  2 
village  N/A  ⓘTags: Graph Theory, Greedy, Trees village  BOI 2020  Batch  15 
monochromecat  N/A  ⓘTags: Graph Theory, Trees monochromecat  ARC 097  Batch  14 
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  22 
oranges2  N/A  ⓘTags: Graph Theory, Trees oranges2  RI Deccourse 2018 Selection Test (0rang3)  Batch  87 
railway  N/A  ⓘTags: Graph Theory, Trees railway  CPSPC 2004  Batch  48 
ancestor  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees ancestor  Classic problem  Batch  98 
employee  N/A  ⓘTags: Graph Theory, Trees employee  Dunjudge Archive  Batch  55 
countingagain  N/A  ⓘTags: Dynamic Programming, Math Counting Again  ARC 104D  Batch  17 
localexpress  N/A  ⓘTags: Dynamic Programming localexpress  AtCoder Typical DP Contest  Batch  54 
towers  N/A  ⓘTags: Data Structures, Dynamic Programming towers  Codeforces 474E  Batch  43 
snowcow  N/A  ⓘTags: Data Structures, Graph Theory, Trees Snowcow  USACO 2019 December Contest Platinum  Batch  17 
guessarray  N/A  ⓘTags: Adhoc 4sadfaces Guessing an Array  Dec Course 2020 BAPS (zaneyu)  Interactive  23 
ants  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees ants  Dunjudge Archive  Interactive  21 
smurfpaths  N/A  ⓘTags: Data Structures, Graph Theory, Trees smurfpaths  RIHCI NOI Selection Test 2020 (rs)  Batch  37 
payraise  N/A  ⓘTags: Graph Theory payraise  Dunjudge Archive  Batch  84 
selectingintervals  N/A  ⓘTags: Binary Search, Dynamic Programming selectingintervals  Codeforces 1055E  Batch  20 
globalwarming_ceoi  N/A  ⓘTags: Data Structures, Dynamic Programming Global warming  CEOI 2018  Batch  14 
orchard  N/A  ⓘTags: Dynamic Programming, Line Sweep/Sliding Window orchard  NOI 2014  Batch  56 
installingapps  N/A  ⓘTags: Dynamic Programming, Greedy Installing Apps  NWERC 2017  Batch  16 
christmaswall  N/A  ⓘTags: Explicitly Excluded (from IOI), Math Christmas Wall (EE)  Educational Round 2 (maomao90)  Batch  5 
duckduckgo  N/A  ⓘTags: Greedy duckduckgo  Codeforces 1091F  Batch  22 
visitingsingapore  N/A  ⓘTags: Dynamic Programming, Implementation Cancer Visiting Singapore  NOI 2020 Prelims  Batch  12 
llis  N/A  ⓘTags: Dynamic Programming Longest LIS  NUSH NOI Selection Test 2018  Batch  24 
election  N/A  ⓘTags: Data Structures, Dynamic Programming election  Dunjudge Archive  Batch  27 
modules  N/A  ⓘTags: Binary Search, Data Structures, Dynamic Programming, Line Sweep/Sliding Window modules  NUSH NOI Selection Test 2018  Batch  23 
4russians  N/A  ⓘTags: Dynamic Programming 4russians  RIHCI NOI Selection Test 2020 (jamielim)  Batch  66 
nis  N/A  ⓘTags: Data Structures, Dynamic Programming nis  Dunjudge Archive  Batch  51 
stamps  N/A  ⓘTags: Dynamic Programming stamps  Dunjudge Archive  Batch  43 
assignpaths  N/A  ⓘTags: Binary Search, Graph Theory, Greedy, Trees assignpaths  USACO 2020 February Contest, Platinum  Batch  23 
manycolours  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Trees manycolours  ABC 133  Batch  35 
merchant_o  N/A  ⓘTags: Dynamic Programming, Slope Trick Merchant Otter  Dec Course 2020 BAPS  Batch  20 
arrayproblem  N/A  ⓘTags: Greedy arrayproblem  Codeforces  Batch  82 
cheerleaders  N/A  ⓘTags: Dynamic Programming cheerleaders  Atcoder Educational DP Contest  Batch  35 
snakesnack  N/A  ⓘTags: Dynamic Programming, Greedy snakesnack  Codeforces 1239E  Batch  16 
neckties  N/A  ⓘTags: Data Structures, Greedy Just Long Neckties  JOI 2020 Final Round  Batch  82 
laughter  N/A  ⓘTags: Binary Search, Data Structures, Implementation Cancer, Line Sweep/Sliding Window laughter  Educational Codeforces Round 27  Batch  10 
smurfberries  N/A  ⓘTags: Binary Search smurfberries  AllUkrainian School Olympiad in Informatics 2011  Batch  24 
smallprimes_ex  N/A  ⓘTags: Meet in the Middle Small Primes?  Classic Problem?  Batch  26 
removeedges  N/A  ⓘTags: Graph Theory removeedges  Atcoder  Batch  22 
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  14 
christmastree  N/A  ⓘTags: Graph Theory, Trees Christmas Tree  Educational Round 2 (errorgorn, oolimry)  Batch  11 
pairs  N/A  ⓘTags: Binary Search pairs  AtCoder Beginner Contest 155  Batch  35 
christmasfiboseq  N/A  ⓘTags: Math Chirstmas Fibonacci Sequence  Educational Round 2 (errorgorn)  Batch  8 
candies_joi  N/A  ⓘTags: Adhoc, Greedy candies_joi  JOI 2017/2018 Spring Camp  Batch  22 
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  7 
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  13 
baseplans  N/A  ⓘTags: Adhoc Base Plans  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  12 
merchant  N/A  ⓘTags: Binary Search, Dynamic Programming, Graph Theory Travelling Merchant  APIO 2017  Batch  15 
runway  N/A  ⓘTags: Binary Search, Graph Theory Jianzhi’s Runway Show  RI NOI Selection Test 2017  Batch  47 
rabbitlineup  N/A  ⓘTags: Divide and Conquer, Dynamic Programming rabbitlineup  Dunjudge Archive  Batch  13 
globalwarming  N/A  ⓘTags: Line Sweep/Sliding Window Global Warming  NOI 2013  Batch  92 
justright  N/A  ⓘTags: Binary Search justright  Dunjudge Archive  Batch  45 
lunchcombo  N/A  ⓘTags: Binary Search, Greedy lunchcombo  RI November Course Stage 2 Selection Test 2019  Batch  48 
rubies  N/A  ⓘTags: Binary Search rubies  Dunjudge Archive (pwypeanut)  Batch  21 
summit  N/A  ⓘTags: Binary Search summit  Dunjudge Archive  Batch  115 
nonboringsequences  N/A  ⓘTags: Divide and Conquer nonboringsequences  Dunjudge Archive  Batch  29 
ljubomora  N/A  ⓘTags: Binary Search ljubomora  COCI 2012/2013  Batch  120 
inversions  N/A  ⓘTags: Data Structures, Divide and Conquer inversions  Dunjudge Archive  Batch  74 
fuel  N/A  ⓘTags: Greedy fuel  Dunjudge Archive  Batch  116 
harddisk  N/A  ⓘTags: Bitmask, Brute Force, Meet in the Middle harddisk  2015 NOI Training ProblemSetter Contest  Batch  51 
catfight  N/A  ⓘTags: Line Sweep/Sliding Window catfight  Dunjudge Archive  Batch  155 
bobek  N/A  ⓘTags: Bitmask, Meet in the Middle bobek  CEOI 2015  Batch  63 
4sum  N/A  ⓘTags: Meet in the Middle 4sum  NOI 2008  Batch  117 
flamethrower  N/A  ⓘTags: Brute Force Flame Thrower  Dunjudge Archive  Batch  376 
candymountain_ex  N/A  ⓘTags: Data Structures, Dynamic Programming candymountain_ex  Dunjudge Archive  Batch  129 
christmasfeast  N/A  ⓘTags: Adhoc Christmas Feast  Educational Round 2 (errorgorn)  Batch  54 
baseplans_ex  N/A  ⓘTags: Data Structures baseplans_ex  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  21 
omnomnom2  N/A  ⓘTags: Graph Theory, Trees omnomnom2  Classic Problem  Batch  76 
toll  N/A  ⓘTags: Data Structures, Dynamic Programming toll  BOI 2017  Batch  20 
lcm  N/A  ⓘTags: Math lcm  Classic Problem  Batch  72 
segmenttree2  N/A  ⓘTags: Data Structures Segment Tree 2  Classic Problem  Batch  110 
omnomnom  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees omnomnom  Classic Problem  Batch  102 
replacedigits  N/A  ⓘTags: Data Structures Replace Digits  ACL Beginner Contest  Batch  46 
ragingthunder  N/A  ⓘTags: Data Structures, Implementation Cancer 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  6 
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  42 
sightseeing2  N/A  ⓘTags: Graph Theory, Trees sightseeing2  RI NOI Selection Test 2015  Batch  50 
examinations  N/A  ⓘTags: Data Structures examinations  JOI  Batch  27 
bacteria  N/A  ⓘTags: Data Structures bacteria  Dunjudge Archive  Batch  25 
sherlockinversions  N/A  ⓘTags: Data Structures, Square Root Decomposition sherlockinversions  Dunjudge Archive  Batch  40 
timeleap  N/A  ⓘTags: Data Structures timeleap  JOI  Batch  3 
streetlamps  N/A  ⓘTags: Data Structures, Divide and Conquer, Implementation Cancer Street Lamps  APIO 2019  Batch  12 
sterilizing  N/A  ⓘTags: Data Structures sterilizing  JOI 2014/15  Batch  33 
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  9 
collectmushrooms4  N/A  ⓘTags: Data Structures, Dynamic Programming collectmushrooms4  Dunjudge Archive  Batch  17 
collectmushrooms3  N/A  ⓘTags: Data Structures collectmushrooms3  Dunjudge Archive  Batch  37 
collectmushrooms  N/A  ⓘTags: Syntax collectmushrooms  Dunjudge Archive  Batch  92 
sortbooks  N/A  ⓘTags: Data Structures sortbooks  IZhO 2019  Batch  21 
poklon  N/A  ⓘTags: Data Structures, Square Root Decomposition poklon  COCI 2016/2017  Batch  37 
cake  N/A  ⓘTags: Brute Force, Data Structures cake  CEOI 2014  Batch  18 
flights  N/A  ⓘTags: Graph Theory flights  Dunjudge Archive  Batch  55 
simp  N/A  ⓘTags: Adhoc, Brute Force Simp  Codeforces 1033A  Batch  246 
trains_mco  N/A  ⓘTags: Graph Theory, Greedy trains_mco  MCO 2015  Batch  7 
removeelements  N/A  ⓘTags: Binary Search, Data Structures removeelements  Codeforces Round #668  Batch  24 
fortunetelling  N/A  ⓘTags: Data Structures Fortune Telling 2  JOI 2014  Batch  23 
ferries  N/A  ⓘTags: Graph Theory ferries  NOI 2013  Batch  31 
inheritance  N/A  ⓘTags: Binary Search, Graph Theory inheritance  JOI 2014/2015  Batch  62 
rblock  N/A  ⓘTags: Graph Theory rblock  USACO 2011 December Contest, Silver Division  Batch  52 
towerdefense  N/A  ⓘTags: Graph Theory towerdefense  Dunjudge Archive  Batch  51 
boundlessboxes  N/A  ⓘTags: Graph Theory boundlessboxes  Dunjudge Archive  Batch  105 
snakenladder  N/A  ⓘTags: Dynamic Programming snakenladder  Dunjudge Archive  Batch  63 
universe  N/A  ⓘTags: Graph Theory, Trees universe  Dunjudge Archive  Batch  101 
subgraphs  N/A  ⓘTags: Graph Theory Subgraphs  Dunjudge Archive  Batch  251 
splithunny  N/A  ⓘTags: Graph Theory splithunny  Dunjudge Archive  Batch  229 
magicwand  N/A  ⓘTags: Graph Theory magicwand  Dunjudge Archive  Batch  96 
milkweed  N/A  ⓘTags: Graph Theory milkweed  Dunjudge Archive  Batch  156 
adjmatrix  N/A  ⓘTags: Graph Theory Adjacency Matrix  Dunjudge Archive  Batch  343 
adjlist  N/A  ⓘTags: Graph Theory Adjacency List  Dunjudge Archive  Batch  312 
dijkstra  N/A  ⓘTags: Graph Theory dijkstra  Dunjudge Archive  Batch  148 
bracketsuperseq  N/A  ⓘTags: Dynamic Programming Shortest Bracket Supersequence  Codeforces 1272F  Batch  26 
beautifulbrackets  N/A  ⓘTags: Dynamic Programming Beautiful Bracket Sequence  Codeforces 1264D1  Batch  26 
fractionalmultiset  N/A  ⓘTags: Dynamic Programming Fractional Multiset  ARC 107  Batch  28 
hedgehogcrimes_easy  N/A  ⓘTags: Dynamic Programming Hedgehog Crimes (Easy Version)  Classic Problem  Batch  105 
unmerge  N/A  ⓘTags: Dynamic Programming Unmerge  Codeforces 1381B  Batch  59 
infiniteloop  N/A  ⓘTags: Graph Theory Infinite Looping Sequence  2017 RI Dec Course Sel (pwypeanut)  Batch  19 
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  42 
subknapsack  N/A  ⓘTags: Dynamic Programming Knapsack for All Subsets  Atcoder Beginner Contest 169  Batch  28 
moosic  N/A  ⓘTags: Data Structures moosic  Codeforces Round #386  Batch  21 
conversations  N/A  ⓘTags: Data Structures Zookeeper's Conversations  Singapore Zoo (shenxy13)  Batch  75 
berlandtaxi  N/A  ⓘTags: Data Structures, Implementation Cancer Berland.Taxi  NEERC 2017 Southern Subregional Contest  Batch  17 
frogs  N/A  ⓘTags: Syntax Frogs  Winter Computer School 2010/11 Team Contest #1  Batch  161 
smallprimes  N/A  ⓘTags: Brute Force, Math Small Primes  Classic Problem  Batch  77 
beareatrabbit  N/A  ⓘTags: Dynamic Programming Bear Eat Rabbit  Classic Problem  Batch  186 
fibo  N/A  ⓘTags: Dynamic Programming, Math Fibonacci  Classic Problem  Batch  424 
mercurypoisoning  N/A  ⓘTags: Graph Theory Mercury Poisoning  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  11 
pairsums  N/A  ⓘTags: Syntax Button Pairs  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  166 
peakfinding  N/A  ⓘTags: Syntax Peak Finding  UWCOI 2020 (socho, astoria, kimbj0709)  Batch  89 
mountains  N/A  ⓘTags: Data Structures Mountains  NOI 2020 Prelims  Batch  95 
snapknack  N/A  ⓘTags: Dynamic Programming snapknack  Dunjudge Archive  Batch  39 
rabbiteatrabbit  N/A  ⓘTags: Dynamic Programming rabbiteatrabbit  Dec Trg 2019 (Elementary) (jamielim)  Batch  72 
trains  N/A  ⓘTags: Dynamic Programming trains  Dunjudge Archive  Batch  123 
walking  N/A  ⓘTags: Dynamic Programming walking  NOI 2012  Batch  44 
lis_easy  N/A  ⓘTags: Dynamic Programming lis_easy  Classic problem  Batch  302 
moneychanger  N/A  ⓘTags: Dynamic Programming moneychanger  Dunjudge Archive  Batch  167 
speakers  N/A  ⓘTags: Greedy speakers  Dunjudge Archive  Batch  109 
routers  N/A  ⓘTags: Greedy routers  Dunjudge Archive  Batch  64 
pandaeyes  N/A  ⓘTags: Greedy pandaeyes  Dunjudge Archive  Batch  125 
blanko  N/A  ⓘTags: Data Structures, Greedy blanko  Dunjudge Archive  Batch  10 
weddingcoins  N/A  ⓘTags: Greedy weddingcoins  Dunjudge Archive  Batch  225 
numericalstrings  N/A  ⓘTags: Greedy, Math numericalstrings  RI November Course Stage 2 Selection Test 2019  Batch  45 
binarycoins  N/A  ⓘTags: Bitmask, Greedy, Syntax binarycoins  Dunjudge Archive  Batch  213 
lemonadestand  N/A  ⓘTags: Greedy lemonadestand  Dunjudge Archive  Batch  16 
change  N/A  ⓘTags: Greedy change  NOI 2011  Batch  25 
lopov  N/A  ⓘTags: Data Structures lopov  COCI 2013/2014  Batch  12 
bridge_apio15  N/A  ⓘTags: Data Structures Palembang Bridges  APIO 2015  Batch  25 
ballgame  N/A  ⓘTags: Data Structures, Dynamic Programming ballgame  Dunjudge Archive  Interactive  36 
optmilk  N/A  ⓘTags: Data Structures, Dynamic Programming Optimal Milking  Dunjudge Archive  Batch  63 
clique  N/A  ⓘTags: Data Structures clique  Algorithm Class MiniContest 8  Batch  36 
jams  N/A  ⓘTags: Data Structures Jams  Algorithm Class MiniContest 8  Batch  12 
penguinfood  N/A  ⓘTags: Data Structures penguinfood  Dunjudge Archive  Batch  46 
illuminate  N/A  ⓘTags: Math, Syntax Illuminate  RIHCI NOI Selection Test 2020 (bensonlzl)  Batch  150 
wabot  N/A  ⓘTags: Greedy wabot  December Course 2019 Advanced Final Contest (bensonlzl)  Batch  170 
boxispull  N/A  ⓘTags: Adhoc, Syntax Box is Pull  Codeforces Raif Round 1 (bensonlzl)  Batch  374 
artswap  N/A  ⓘTags: Data Structures artswap  HCI NOI Selection Retest 2020 (bensonlzl)  Interactive  18 
smurf  N/A  ⓘTags: Brute Force, Syntax smurf  RI Deccourse 2018 Selection Test (tch1001)  Batch  329 
paint_apio  N/A  ⓘTags: Adhoc, Line Sweep/Sliding Window, Square Root Decomposition paint_apio  APIO 2020  Interactive  12 
swap  N/A  ⓘTags: Graph Theory, Trees Swapping Cities  APIO 2020  Interactive  19 
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  258 
lineup  N/A  ⓘTags: Line Sweep/Sliding Window lineup  USACO Silver Nov 2011  Batch  120 
poi  N/A  ⓘTags: Syntax poi  IOI 2009  Batch  96 
catlunch  N/A  ⓘTags: Data Structures, Greedy catlunch  RI/RJC NOI Selection Test 2016  Batch  194 
ccs  N/A  ⓘTags: Data Structures ccs  Dunjudge Archive  Batch  154 
medianheap  N/A  ⓘTags: Data Structures medianheap  Dunjudge Archive  Batch  137 
supermarket  N/A  ⓘTags: Data Structures, Line Sweep/Sliding Window supermarket  RI Dec Course Sel 2017  Batch  40 
lengthsort  N/A  ⓘTags: Syntax lengthsort  Dunjudge Archive  Batch  253 
arrayfind  N/A  ⓘTags: Binary Search arrayfind  Dunjudge Archive  Batch  225 
contestcalc  N/A  ⓘTags: Math, Syntax contestcalc  Dunjudge Archive  Batch  271 
lvm  N/A  ⓘTags: Brute Force, Data Structures lvm  NOI 2008  Batch  188 
brick  N/A  ⓘTags: Data Structures brick  Dunjudge Archive  Batch  321 
guanine  N/A  ⓘTags: Data Structures guanine  Dunjudge Archive  Batch  248 
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  2 
lppfnlcst  N/A  ⓘTags: Binary Search, Data Structures Lazy Propagation Persistant Fat Nodes Li Chao Segment Tree  Educational Round 1 (errorgorn)  Batch  16 
lemmas  N/A  ⓘTags: Graph Theory lemmas  Educational Round 1 (errorgorn)  Batch  29 
spaceinvaders  N/A  ⓘTags: Brute Force, Data Structures, Dynamic Programming, Line Sweep/Sliding Window spaceinvaders  Educational Round 1 (bensonlzl)  Batch  33 
seats  N/A  ⓘTags: Data Structures Seats  IOI 2018  Interactive  3 
divsum  N/A  ⓘTags: Math Divisor Sum  Educational Round 1 (errorgorn)  Batch  16 
cakerun  N/A  ⓘTags: Data Structures Bowen's Cake Run  December Course 2019 Advanced Final Contest (rs)  Batch  12 
messy  N/A  ⓘTags: Binary Search Unscrambling a Messy Bug  IOI 2016  Interactive  5 
maximum  N/A  ⓘTags: Syntax Maximum  Dunjudge Archive  Batch  594 
sumint  N/A  ⓘTags: Syntax Sum of Integers  Dunjudge Archive  Batch  605 
segmenttree  N/A  ⓘTags: Data Structures Segment Tree  Classic problem  Batch  183 
naptime  N/A  ⓘTags: Graph Theory, Greedy naptime  RIHCI December Course Selection 2020 (cstuart)  Batch  25 
conversations_easy  N/A  ⓘTags: Data Structures Zookeeper's Conversations (Easy Version)  RIHCI December Course Selection 2020 (shenxy13)  Batch  89 
interestring  N/A  ⓘTags: Dynamic Programming, Math interestring  RIHCI December Course Selection 2020 (cstuart)  Batch  17 
square_ioi  N/A  ⓘTags: Dynamic Programming square_ioi  IOI 2014 Practice  Interactive  29 
tickets  N/A  ⓘTags: Adhoc, Data Structures Carnival Tickets  IOI 2020  Interactive  10 
horses  N/A  ⓘTags: Data Structures, Math horses  IOI 2015  Interactive  19 
fencing2  N/A  ⓘTags: Data Structures, Implementation Cancer fencing2  RIHCI December Course Selection 2020 (errorgorn)  Batch  5 
xorb  N/A  ⓘTags: Math, Syntax xorb  Dunjudge Archive  Batch  37 
fruitsequences  N/A  ⓘTags: Adhoc, Data Structures Fruit Sequences  Codeforces Raif Round 1 (bensonlzl)  Batch  45 
bracketscore  N/A  ⓘTags: Greedy bracketscore  AGC48  Batch  22 
growingtrees  N/A  ⓘTags: Binary Search, Data Structures growingtrees  BOI 2011  Batch  31 
singlefile  N/A  ⓘTags: Data Structures singlefile  Dunjudge Archive  Batch  61 
taxcollection  N/A  ⓘTags: Greedy, Syntax taxcollection  RIHCI December Course Selection 2020 (JustAWallaby)  Batch  84 
entropy  N/A  ⓘTags: Greedy, Syntax entropy  RIHCI December Course Selection 2020 (0rang3)  Batch  88 
applefarm  N/A  ⓘTags: Graph Theory applefarm  NUSH ISC 2020 (oolimry)  Batch  52 
basketball  N/A  ⓘTags: Binary Search, Greedy basketball  NUSH ISC 2020 (dantoh)  Batch  27 
coke  N/A  ⓘTags: Dynamic Programming, Greedy Coke  NUSH ISC 2020 (errorgorn)  Batch  59 
ljll  N/A  ⓘTags: Math LJLL  NUSH ISC 2020 (errorgorn)  Batch  46 
performance  N/A  ⓘTags: Math Performance  NUSH ISC 2020 (oolimry)  Batch  37 
ping  N/A  ⓘTags: Syntax ping  RI HCI NOI Selection 2019 Practice (bensonlzl)  Interactive  49 
safety  N/A  ⓘTags: Dynamic Programming, Slope Trick Safety  NOI 2018  Batch  11 
aesthetic  N/A  ⓘTags: Data Structures, Graph Theory aesthetic  NOI 2020 Finals  Batch  9 
arcade  N/A  ⓘTags: Adhoc, Data Structures, Dynamic Programming arcade  NOI 2020 Finals  Batch  15 
progression  N/A  ⓘTags: Data Structures, Implementation Cancer progression  NOI 2020 Finals  Batch  22 
discharging  N/A  ⓘTags: Data Structures, Dynamic Programming discharging  NOI 2020 Finals  Batch  25 
labels  N/A  ⓘTags: Adhoc labels  NOI 2020 Finals  Batch  67 
biscuits  N/A  ⓘTags: Dynamic Programming, Math Packing Biscuits  IOI 2020 (Day 2)  Interactive  8 
pandaski  N/A  ⓘTags: Data Structures, Dynamic Programming, Implementation Cancer pandaski  NOI 2016  Batch  10 
rockclimbing  N/A  ⓘTags: Graph Theory rockclimbing  NOI 2016  Batch  8 
fabric  N/A  ⓘTags: Data Structures, Dynamic Programming fabric  NOI 2016  Batch  3 
pokemonmaster  N/A  ⓘTags: Data Structures, Dynamic Programming, Graph Theory, Implementation Cancer, Square Root Decomposition, Trees I want to be the very best too!  NOI 2017  Batch  5 
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  54 
carrots  N/A  ⓘTags: Greedy carrots  Codeforces Raif Round 1 (errorgorn)  Batch  52 
abbb  N/A  ⓘTags: Greedy abbb  Codeforces Raif Round 1 (errorgorn)  Batch  63 
firefighting  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees firefighting  NOI 2020 Qualification  Batch  20 
relaymarathon  N/A  ⓘTags: Brute Force, Graph Theory relaymarathon  NOI 2020 Qualification  Batch  24 
fuelstation  N/A  ⓘTags: Data Structures fuelstation  NOI 2020 Qualification  Batch  25 
crypto  N/A  ⓘTags: Data Structures crypto  NOI 2020 Qualification  Batch  38 
rmq  N/A  ⓘTags: Data Structures, Greedy rmq  NOI 2017  Batch  17 
hotspot  N/A  ⓘTags: Graph Theory hotspot  NOI 2017  Batch  11 
boomerangs  N/A  ⓘTags: Adhoc Bouncing Boomerangs  Codeforces Raif Round 1 (bensonlzl)  Batch  3 
riggedroads  N/A  ⓘTags: Graph Theory, Greedy, Trees riggedroads  NOI 2019  Batch  23 
feast  N/A  ⓘTags: Dynamic Programming, Greedy feast  NOI 2019  Batch  21 
lasers  N/A  ⓘTags: Adhoc, Data Structures lasers  NOI 2019  Batch  28 
pilot  N/A  ⓘTags: Adhoc, Data Structures pilot  NOI 2019  Batch  68 
charges  N/A  ⓘTags: Graph Theory Experimental Charges  NOI 2019 Prelims  Batch  37 
lightningrod  N/A  ⓘTags: Adhoc, Data Structures LightningRod  NOI 2018  Batch  102 
journey3  N/A  ⓘTags: Dynamic Programming Journey  NOI 2018  Batch  19 
knapsack  N/A  ⓘTags: Dynamic Programming Knapsack  NOI 2018 Prelims  Batch  25 
plagia  N/A  ⓘTags: Data Structures plagia  December Course 2018 Advanced Final Contest  Batch  19 
collectmushrooms2  N/A  ⓘTags: Data Structures collectmushrooms2  Dunjudge Archive  Batch  66 
appeal  N/A  ⓘTags: Data Structures appeal  Dunjudge Archive  Batch  26 
fenwicktree  N/A  ⓘTags: Data Structures fenwicktree  Classic Problem  Batch  123 
rotarylock  N/A  ⓘTags: Data Structures rotarylock  HCI NOI Selection Test 2015  Batch  79 
candies  N/A  ⓘTags: Data Structures candies  Dunjudge Archive  Batch  71 
pushups  N/A  ⓘTags: Math pushups  Dunjudge Archive  Batch  99 
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  12 
car  N/A  ⓘTags: Graph Theory car  Dunjudge Archive  Batch  168 
rabbittolls  N/A  ⓘTags: Graph Theory rabbittolls  Dunjudge Archive  Batch  11 
cycling  N/A  ⓘTags: Graph Theory, Trees cycling  Dunjudge Archive  Batch  14 
sealevel  N/A  ⓘTags: Graph Theory sealevel  Dunjudge Archive  Batch  116 
penguinislands  N/A  ⓘTags: Dynamic Programming, Graph Theory penguinislands  Dunjudge Archive  Batch  39 
transform  N/A  ⓘTags: Brute Force, Dynamic Programming, Graph Theory transform  Dunjudge Archive  Batch  76 
rank  N/A  ⓘTags: Graph Theory rank  NOI 2008  Batch  72 
foreveralone  N/A  ⓘTags: Data Structures foreveralone  Dunjudge Archive  Batch  147 
nemo  N/A  ⓘTags: Graph Theory nemo  Dunjudge Archive  Batch  73 
catleap  N/A  ⓘTags: Graph Theory catleap  Dunjudge Archive  Batch  22 
binaryroads  N/A  ⓘTags: Graph Theory binaryroads  Dunjudge Archive  Batch  65 
pandacity  N/A  ⓘTags: Graph Theory, Greedy pandacity  Dunjudge Archive  Batch  58 
goodmorning  N/A  ⓘTags: Graph Theory Good Morning  ISC 2020 practice (errorgorn)  Batch  7 
nihonese  N/A  ⓘTags: Syntax nihonese  ISC 2020 practice (errorgorn)  Batch  76 
simcity  N/A  ⓘTags: Graph Theory simcity  Dunjudge Archive  Batch  54 
dotjoin  N/A  ⓘTags: Graph Theory, Trees dotjoin  Dunjudge Archive  Batch  47 
sightseeing  N/A  ⓘTags: Graph Theory, Trees sightseeing  NOI 2014  Batch  94 
minimax  N/A  ⓘTags: Graph Theory, Trees minimax  Hello 2020 (errorgorn)  Batch  1 
buycomputer  N/A  ⓘTags: Greedy, Syntax buycomputer  Dec Trg 2019 (Elementary) (errorgorn)  Batch  38 
surnames  N/A  ⓘTags: Dynamic Programming, Graph Theory, Implementation Cancer, Square Root Decomposition, Trees Surnames  2020 CNY (errorgorn)  Batch  13 
unluckyfloors  N/A  ⓘTags: Dynamic Programming unluckyfloors  NOI 2016  Batch  24 
bestplace  N/A  ⓘTags: Greedy, Syntax bestplace  NOI 2017  Batch  153 
xmas  N/A  ⓘTags: Syntax xmas  NOI 2009  Batch  297 
rmaxq  N/A  ⓘTags: Data Structures Range Max Query  Dunjudge Archive  Batch  105 
roadsideadverts  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees roadsideadverts  NOI 2017  Batch  60 
bananafarm  N/A  ⓘTags: Data Structures bananafarm  NOI 2015  Batch  62 
card  N/A  ⓘTags: Data Structures Card  NOI 2010  Batch  326 
gift  N/A  ⓘTags: Syntax gift  NOI 2007  Batch  100 
lunchbox  N/A  ⓘTags: Greedy Lunch Box  NOI 2016  Batch  487 
paint  N/A  ⓘTags: Greedy paint  NOI 2011  Batch  291 
levenshtein  N/A  ⓘTags: Dynamic Programming levenshtein  Classic problem  Batch  52 
helloworld  N/A  ⓘTags: Syntax Hello World  Classic problem  Batch  840 
chocolate  N/A  ⓘTags: Dynamic Programming chocolate  Dunjudge Archive  Batch  17 
watching  N/A  ⓘTags: Binary Search, Dynamic Programming watching  JOI Open 2013  Batch  67 
bottle  N/A  ⓘTags: Dynamic Programming, Graph Theory, Trees Bottle  Dunjudge Archive  Batch  26 
goinghome_agc  N/A  ⓘTags: Data Structures, Greedy goinghome_agc  AGC 023  Batch  34 
ufo  N/A  ⓘTags: Dynamic Programming ufo  Dunjudge Archive  Batch  8 
radioactive  N/A  ⓘTags: Divide and Conquer, Dynamic Programming radioactive  NOI 2015  Batch  19 
niangao  N/A  ⓘTags: Data Structures Nian Gao  2020 CNY (errorgorn)  Batch  5 
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  12 
hole  N/A  ⓘTags: Binary Search, Dynamic Programming hole  Dunjudge Archive  Batch  23 
collectmushrooms6  N/A  ⓘTags: Dynamic Programming CollectMushrooms  NOI 2018  Batch  118 
special  N/A  ⓘTags: Dynamic Programming special  Dunjudge Archive  Batch  26 
history  N/A  ⓘTags: Dynamic Programming history  Dunjudge Archive  Batch  44 
commonsubstring  N/A  ⓘTags: Dynamic Programming commonsubstring  Dunjudge Archive  Batch  50 
monopoly  N/A  ⓘTags: Dynamic Programming monopoly  Dunjudge Archive  Batch  42 
buffet  N/A  ⓘTags: Dynamic Programming buffet  Dunjudge Archive  Batch  123 
mate  N/A  ⓘTags: Graph Theory mate  RSA Fun Contest (errorgorn)  Batch  15 
girlfriends  N/A  ⓘTags: Explicitly Excluded (from IOI), Math girlfriends (EE)  CP Singles Day Contest 2020 (errorgorn)  Batch  2 
floors  N/A  ⓘTags: Data Structures floors  Dunjudge Archive  Batch  116 
inequality  N/A  ⓘTags: Data Structures, Divide and Conquer, Dynamic Programming, Implementation Cancer, 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  14 
pokeadd  N/A  ⓘTags: Math pokeadd  Dunjudge Archive  Batch  30 
chessislands  N/A  ⓘTags: Graph Theory chessislands  NOI 2010 Selection Test  Batch  81 
primefactorization  N/A  ⓘTags: Math primefactorization  Dunjudge Archive  Batch  140 
papaya  N/A  ⓘTags: Graph Theory papaya  Dunjudge Archive  Batch  70 
amicablecats  N/A  ⓘTags: Math, Syntax amicablecats  Dunjudge Archive  Batch  87 
gcd  N/A  ⓘTags: Math, Syntax Greatest Common Divisor  Classic Problem  Batch  506 
pokenumbers  N/A  ⓘTags: Math pokenumbers  Dunjudge Archive  Batch  31 
exponentiate  N/A  ⓘTags: Math Exponentiate  Classic Problem  Batch  260 
nprime  N/A  ⓘTags: Brute Force, Math Prime  NOI 2008  Batch  224 
mrt  N/A  ⓘTags: Graph Theory MRT  Dunjudge Archive  Batch  184 
dinowalk  N/A  ⓘTags: Graph Theory dinowalk  Classic Problem  Batch  106 
prime  N/A  ⓘTags: Math Prime Numbers  Classic Problem  Batch  334 
housing  N/A  ⓘTags: Dynamic Programming housing  NOI 2008  Batch  75 
coincombinations  N/A  ⓘTags: Dynamic Programming coincombinations  Classic Problem  Batch  113 
republiccity  N/A  ⓘTags: Graph Theory Republic City  RI Nov Sel 2020 (JustAWallaby)  Batch  16 
stonk  N/A  ⓘTags: Greedy Stonks  Dec Trg 2019 (Elementary) (shenxy13)  Batch  112 
firelord  N/A  ⓘTags: Dynamic Programming firelord  RI Nov Sel 2020 (jiahng)  Batch  35 
coinbag  N/A  ⓘTags: Dynamic Programming coinbag  Dunjudge Archive  Batch  145 
potatotree  N/A  ⓘTags: Data Structures potatotree  RI Nov Sel 2020 (syy)  Batch  119 
dyingpolynomial  N/A  ⓘTags: Binary Search Dying Polynomial  RI Nov Sel 2020 (JustAWallaby)  Batch  77 
exam  N/A  ⓘTags: Syntax Exam  RI Nov Sel 2020 (syy)  Batch  649 
gecko  N/A  ⓘTags: Dynamic Programming gecko  NOI 2008  Batch  225 
pascal  N/A  ⓘTags: Dynamic Programming, Math pascal  Dunjudge Archive  Batch  118 
flybot  N/A  ⓘTags: Dynamic Programming flybot  Dunjudge Archive  Batch  191 
strawberry  N/A  ⓘTags: Data Structures, Dynamic Programming Speedy Strawberries  2020 CNY (shenxy13)  Batch  14 
divisibility  N/A  ⓘTags: Dynamic Programming divisibility  Dunjudge Archive  Batch  41 
lcs  N/A  ⓘTags: Dynamic Programming lcs  Classic problem  Batch  184 
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  27 
addition  N/A  ⓘTags: Syntax Addition of 2 numbers  Classic problem  Batch  735 
general  N/A  ⓘTags: Graph Theory general  Classic Problem  Batch  143 
lis  N/A  ⓘTags: Binary Search, Dynamic Programming Longest Increasing Subsequence  Classic problem  Batch  176 
deathray  N/A  ⓘTags: Data Structures deathray  Dec Trg 2019 (Elementary) (shenxy13)  Batch  49 
pigeonnests  N/A  ⓘTags: Data Structures, Graph Theory, Trees pigeonnests  RSA Fun Contest (shenxy13)  Batch  24 
leftright  N/A  ⓘTags: Data Structures Left and Right  Dec Trg 2019 (Elementary) (oolimry)  Batch  98 
greeting  N/A  ⓘTags: Syntax CNY Greetings  2020 CNY (errorgorn)  Batch  171 
doubletrouble  N/A  ⓘTags: Data Structures, Greedy Double Trouble  Dec Trg 2019 (Elementary) (oolimry)  Batch  26 
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  2 