None
Scoreboard| Problem ID | Your Score | Title | Source | Problem Type |
|---|---|---|---|---|
| deciphering_zane | N/A |
Dceiprhenig Zane | April Fools 2023 (Xiaoyang, leyi, ecxx, tux, Craftless, Gladius3482) | Batch |
| portals | N/A |
portals | USACO 2021 US Open, Gold | Batch |
| elca | N/A |
elca | Codeforces 482E | Batch |
| foodchain | N/A |
Food Chain | Dec Trg 2019 (Elementary) | Batch |
| cupboardjumps | N/A |
cupboardjumps | Codeforces 1500F | Batch |
| orangecollector | N/A |
Orange Collector | RI-HCI December Course Selection 2019 (rs) | Batch |
| strawberry | N/A |
Speedy Strawberries | 2020 CNY (shenxy13) | Batch |
| explosion | N/A |
explosion | Classic Problem | Batch |
| dquery | N/A |
dquery | Classic Problem | Batch |
| prefixsums | N/A |
prefixsums | Classic Problem (YeoBL20) | Batch |
| omnomnom2 | N/A |
omnomnom2 | Classic Problem | Batch |
| numberfun | N/A |
numberfun | Dunjudge Archive | Batch |
| bottle | N/A |
Bottle | Dunjudge Archive | Batch |
| snakenladder | N/A |
snakenladder | Dunjudge Archive | Batch |
| christmasturkeyfarm | N/A |
Christmas Turkey Farming | Educational Round 2 (dillion) | Batch |
| divisibility | N/A |
divisibility | Dunjudge Archive | Batch |
| aircon | N/A |
aircon | Codeforces Round #757 (Div. 2) | Batch |
| jjooii2 | N/A |
jjooii2 | JOI 2020 Final Round | Batch |
| scrivener | N/A |
Crayfish scrivener | IOI 2012 | Interactive |
| singlefile | N/A |
singlefile | Dunjudge Archive | Batch |
| guanine | N/A |
guanine | Dunjudge Archive | Batch |
| collectingstamps3 | N/A |
collectingstamps3 | JOI 2020 Final Round | Batch |
| removemq | N/A |
removemq | ARC 098E | Batch |
| rabbitradar | N/A |
rabbitradar | Dunjudge Archive (bensonlzl) | Batch |
| chemistry | N/A |
chemistry | April Fools Contest 2020 (0rang3) | Batch |
| rebuild | N/A |
rebuild | RI-HCI-NUSH NOI Selection Test 2021 (shenxy13) | Interactive |
| potionshard | N/A |
Potions (Hard Version) | Codeforces Round 723 (errorgorn, oolimry) | Batch |
| mergers | N/A |
mergers | JOI | Batch |
| conversations_easy | N/A |
Zookeeper's Conversations (Easy Version) | RI-HCI December Course Selection 2020 (shenxy13) | Batch |
| arrayfind | N/A |
arrayfind | Dunjudge Archive | Batch |
| penguinislands | N/A |
penguinislands | Dunjudge Archive | Batch |
| monsters | N/A |
Monsters | Dec Course 2023 Selection Test (beepbeepsheep) | Batch |
| islands2 | N/A |
Islands | IOI 2008 | Batch |
| potatotree | N/A |
potatotree | RI Nov Sel 2020 (syy) | Batch |
| lvm | N/A |
lvm | NOI 2008 | Batch |
| prisoners | N/A |
prisoners | APIO 2014 Mock Contest | Communication |
| stickytape | N/A |
Sticky Tape | Classic Problem | Batch |
| sortingtrainers | N/A |
Sorting Trainers | Bologna IOI in Teams 2017 | Batch |
| carpark | N/A |
carpark | Dunjudge Archive | Batch |
| vault | N/A |
vault | BOI 2022 | Batch |
| berlandtaxi | N/A |
Berland.Taxi | NEERC 2017 Southern Subregional Contest | Batch |
| rect | N/A |
Rectangle | IOI 2019 (Day 1) | Interactive |
| hiddenarray | N/A |
Hidden Array | April Fools 2023 (ecxx) | Batch |
| strangedevice | N/A |
Strange Device | APIO 2019 | Batch |
| harmony | N/A |
harmony | Dunjudge Archive | Batch |
| filibuster | N/A |
Filibuster | IOI 2020 Practice Session | Batch |
| killanton | N/A |
Kill Anton | Codeforces Round 723 (errorgorn) | Batch |
| pythonindentation | N/A |
pythonindentation | Codeforces 909C | Batch |
| promotion | N/A |
Promotion Counting | USACO 2017 Jan, Platinum | Batch |
| edgeremove | N/A |
edgeremove | LOJ #3705 | Batch |
| strangedevice2 | N/A |
strangedevice2 | Codeforces 1158E | Interactive |
| findinggrass | N/A |
Finding Grass | Dec Course 2022 BAPS (hmm) | Batch |
| tickets | N/A |
Carnival Tickets | IOI 2020 | Interactive |
| gotoschool | N/A |
Go To School | ABC142 | Batch |
| bingo | N/A |
Bingo | Grand Prix of Daejeon | Batch |
| coincombinations | N/A |
coincombinations | Classic Problem | Batch |
| newhome | N/A |
New Home | APIO 2018 | Batch |
| flamethrower_ex | N/A |
flamethrower_ex | RI November Course 2023 Diagnostic Test (Potato3218) | Batch |
| belittle | N/A |
belittle | ANDSS Welcome 2023 (Day 2) (shoryu386) | Batch |
| fuel | N/A |
fuel | Dunjudge Archive | Batch |
| realfun | N/A |
Real Fun | CPSPC 2010 | Batch |
| contestcalc | N/A |
contestcalc | Dunjudge Archive | Batch |
| doubletrip | N/A |
Double Trip | Codeforces 1343E | Batch |
| boxhaskey | N/A |
Box Has Key | HCI-RI 2020 May Contest (bensonlzl) | Batch |
| boundedpermutation | N/A |
Bounded Permutation | HCI-NUSH NOI Selection 2022 (maomao90) | Batch |
| askonegetonefree | N/A |
AskOneGetOneFree | NOI 2015 | Interactive |
| greeting | N/A |
CNY Greetings | 2020 CNY (errorgorn) | Batch |
| mountainrange | N/A |
mountainrange | Codeforces 935F | Batch |
| collectmushrooms5 | N/A |
collectmushrooms5 | Dunjudge Archive | Batch |
| hungryrabbits1 | N/A |
Hungry Rabbits 1 | RI-HCI Final Contest 2022 (bensonlzl) | Batch |
| conductslip | N/A |
Conduct Slip | RI Novcourse Final Contest 2023 (RandomPerson, Tyx2019) | Batch |
| hacking | N/A |
Hacking | Classic problem (fyss006) | Batch |
| segmenttree2 | N/A |
Segment Tree 2 | Classic Problem | Batch |
| girlfriend | N/A |
girlfriend | Dunjudge Archive | Batch |
| cashmoney | N/A |
Cash Money | 2020 CNY | Batch |
| nuskevsphantom | N/A |
Nuske vs Phantom Thnook | AGC 015C | Batch |
| dungeons | N/A |
Dungeons Game | IOI 2021 | Interactive |
| shopping_joi | N/A |
shopping_joi | JOISC 2021 | Communication |
| christmasfiboseq | N/A |
Chirstmas Fibonacci Sequence | Educational Round 2 (errorgorn) | Batch |
| OrXor | N/A |
orxor | ABC 197C | Batch |
| kronican | N/A |
kronican | COCI 2016/2017 | Batch |
| flooding | N/A |
flooding | Dunjudge Archive | Batch |
| packingpests | N/A |
packingpests | Kattis | Batch |
| socks | N/A |
socks | December Course 2018 Elementary Final Contest (Damian) | Batch |
| rmaxq | N/A |
Range Max Query | Dunjudge Archive | Batch |
| illuminate | N/A |
Illuminate | RI-HCI NOI Selection Test 2020 (bensonlzl) | Batch |
| dzumbus | N/A |
Džumbus | COCI 2019/2020 | Batch |
| logs | N/A |
logs | AtCoder | Batch |
| snakesnack | N/A |
snakesnack | Codeforces 1239E | Batch |
| motivation | N/A |
Motivation is Dead | AOI 2023 Day 1 (shoryu386) | Batch |
| arcwrecker2 | N/A |
arcwrecker2 | ARC119C | Batch |
| rarkids | N/A |
rarkids | IOI Sparring 2018 SGP | Interactive |
| cave | N/A |
cave | IOI 2013 | Interactive |
| purplecandy | N/A |
Purple Candy | Classic Problem (shenxy13, ryangohca) | Batch |
| mushrooms | N/A |
Counting Mushrooms | IOI 2020 (Day 2) | Interactive |
| cheaters | N/A |
cheaters | Educational Round 3 (errorgorn) | Batch |
| elephants | N/A |
Elephants | IOI 2011 | Interactive |
| prefixsums2 | N/A |
Prefix Sums 2 | Educational Round 10 (Goodbye cstuart and kai824) (errorgorn) | Batch |
| stones | N/A |
stones | Dunjudge Archive | Batch |
| merchant2 | N/A |
merchant2 | ABC 047D | Batch |
| count1graphs | N/A |
Count 1 Graphs | Educational Round 4 (maomao90, errorgorn) | Batch |
| jumping2 | N/A |
Jumping | Dunjudge Archive | Batch |
| bracketex | N/A |
bracketex | Dunjudge Archive | Batch |
| cross | N/A |
Cross | Dunjudge Archive | Batch |
| sumint | N/A |
Sum of Integers | Dunjudge Archive | Batch |
| magicstring | N/A |
magicstring | AOI 2023 Day 2 (shoryu386) | Batch |
| exponentiate_ex | N/A |
exponentiate_ex | Classic Problem | Batch |
| beautifulbrackets | N/A |
Beautiful Bracket Sequence | Codeforces 1264D1 | Batch |
| cringemeter | N/A |
Cringe Meter | Codeforces 1844F | Batch |
| pekora | N/A |
Pekora and Trampoline | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch |
| bracketsuperseq | N/A |
Shortest Bracket Supersequence | Codeforces 1272F | Batch |
| luckynumbers2 | N/A |
luckynumbers2 | Dec Course Final Contest 2017 | Batch |
| arraypartition | N/A |
arraypartition | Codeforces 487B | Batch |
| overtaking | N/A |
Overtaking | IOI 2023 (Day 2) | Interactive |
| youngmaids | N/A |
youngmaids | Dunjudge Archive | Batch |
| catnames | N/A |
catnames | RI/RJC NOI Selection Test 2016 | Batch |
| radiance | N/A |
radiance | RSA Fun Contest (oolimry) | Batch |
| sherlockinversions | N/A |
sherlockinversions | Dunjudge Archive | Batch |
| descsort | N/A |
descsort | Dunjudge Archive | Batch |
| flamethrower | N/A |
Flame Thrower | Dunjudge Archive | Batch |
| cokelesssugar | N/A |
Coke: Less Sugar | Codeforces 1415E (bensonlzl) | Batch |
| snowball | N/A |
snowball | ANDSS Welcome 2023 (Day 1) (shoryu386) | Batch |
| couples | N/A |
couples | December Course 2018 Advanced Final Contest | Batch |
| harddisk | N/A |
harddisk | 2015 NOI Training Problem-Setter Contest | Batch |
| tickethandling | N/A |
tickethandling | Dec Course 2023 Elementary Contest 4 (DS I) (shoryu386) | Batch |
| squidzofrenzic | N/A |
squidzofrenzic | Dunjudge Archive | Batch |
| workoutplan | N/A |
Workout plan | Bubble Cup 12 Div 1 | Batch |
| walking | N/A |
walking | NOI 2012 | Batch |
| sortbooks | N/A |
sortbooks | IZhO 2019 | Batch |
| combo | N/A |
Combo | IOI 2018 | Interactive |
| bank | N/A |
Bank | IZhO 2014 Day 1 | Batch |
| frog3 | N/A |
Frog 3 | Atcoder Educational DP Contest | Batch |
| deathray | N/A |
deathray | Dec Trg 2019 (Elementary) (shenxy13) | Batch |
| police | N/A |
Police Station | CPSPC 2017 | Batch |
| aliens_ioi | N/A |
Aliens | IOI 2016 | Interactive |
| 1821 | N/A |
1821 | April Fools' 2021 (zaneyu) | Batch |
| performance | N/A |
Performance | NUSH ISC 2020 (oolimry) | Batch |
| sequence_loj | N/A |
sequence_loj | LOJ #3158 | Batch |
| segmenttree | N/A |
Segment Tree | Classic problem | Batch |
| qualitycontrol | N/A |
Quality Control | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Batch |
| speakers | N/A |
speakers | Dunjudge Archive | Batch |
| changingcolours | N/A |
changingcolours | RI Problem Setter Contest 2019 (rs) | Batch |
| universe | N/A |
universe | Dunjudge Archive | Batch |
| 4cuts | N/A |
4cuts | Dunjudge Archive | Batch |
| entropy2 | N/A |
entropy2 | RI December Course Selection Test 2021 (kym) | Batch |
| catchingcheaters | N/A |
Catching Cheaters | Codeforces Round 683 (Div 1) | Batch |
| birthday | N/A |
birthday | RI Problem Setter Contest 2019 (syy) | Batch |
| delegation | N/A |
Delegation | USACO 2020 Feb, Gold | Batch |
| car | N/A |
car | Dunjudge Archive | Batch |
| kickingshoes | N/A |
Kicking Shoes | Educational Round 4 (maomao90) | Batch |
| hexagon | N/A |
Hexagonal Territory | APIO 2021 | Interactive |
| hdb | N/A |
hdb | Dunjudge Archive | Batch |
| sale | N/A |
sale | Dunjudge Archive | Batch |
| greatmerge | N/A |
greatmerge | LOJ #2230 | Batch |
| gfriendmania | N/A |
The 200000 Girlfriends Who Really, Really, Really, Really, Really Love Zane | CSES | Batch |
| powersupply | N/A |
Power Supply | Educational Round 5 (cstuart) | Batch |
| reciprocals | N/A |
Reciprocals | HCI December Course Selection 2021 (huangqr, pavement) | Batch |
| doodles | N/A |
doodles | December Course 2019 Advanced Final Contest (rs) | Batch |
| restoreroad | N/A |
Restore Road | ABC 074D | Batch |
| stepgame | N/A |
stepgame | Classic Problem | Batch |
| weightlifting | N/A |
weightlifting | Google Code Jam 2022 Round 1A | Batch |
| neila | N/A |
neila | RMM 2013/5 | Batch |
| subgraphs | N/A |
Subgraphs | Dunjudge Archive | Batch |
| library | N/A |
Library | JOI 2018/2019 Spring Camp Day 4 | Interactive |
| robot | N/A |
Robots | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch |
| thanossort | N/A |
thanossort | RSA Fun Contest (errorgorn) | Interactive |
| supplies | N/A |
supplies | Dunjudge Archive | Batch |
| installingapps | N/A |
Installing Apps | NWERC 2017 | Batch |
| lightsout | N/A |
Light's Out | Dunjudge Archive | Interactive |
| supermarkets | N/A |
Supermarkets | IOI 2020 Practice Session | Batch |
| lps | N/A |
lps | Dunjudge Archive | Batch |
| harvest | N/A |
Harvest | JOI 2019/2020 | Batch |
| funfair | N/A |
Funfair | Educational Round 5 (rs) | Batch |
| bubblesort | N/A |
Bubble Sort | Educational Round 4 (jamessng, zaneyu, oolimry) | Batch |
| registers | N/A |
Bit Shift Registers | IOI 2021 | Interactive |
| harbingers | N/A |
harbingers | CEOI 2009 | Batch |
| housing | N/A |
housing | NOI 2008 | Batch |
| omnomnom | N/A |
omnomnom | Classic Problem | Batch |
| pokemonmaster | N/A |
I want to be the very best too! | NOI 2017 | Batch |
| trianglesum | N/A |
trianglesum | NOI 2010 Selection Test | Batch |
| spiderclimb | N/A |
spiderclimb | LOJ #3661 | Batch |
| wabot | N/A |
wabot | December Course 2019 Advanced Final Contest (bensonlzl) | Batch |
| duathlon | N/A |
Duathlon | APIO 2018 | Batch |
| amicablecats | N/A |
amicablecats | Dunjudge Archive | Batch |
| sorting | N/A |
Sorting | IOI 2015 | Interactive |
| wombats | N/A |
wombats | IOI 2013 | Interactive |
| fizzbuzz | N/A |
FizzBuzz | Classic Problem | Batch |
| skyscraper_apio15 | N/A |
Jakarta Skyscrapers | APIO 2015 | Batch |
| motest2 | N/A |
MOtest2 | April Fools 2023 (Tyx2019) | Batch |
| zooqueue | N/A |
Zoo Queue | NUS December Training 2021 Diagnostic Test (shenxy13) | Batch |
| rubies | N/A |
rubies | Dunjudge Archive (pwypeanut) | Batch |
| iqtest2 | N/A |
iqtest2 | April Fools' 2022 (errorgorn) | Batch |
| enumeratingbrackets | N/A |
Enumerating Brackets | Waterloo Programming Contest 2016-10-01 | Batch |
| rockclimbing | N/A |
rockclimbing | NOI 2016 | Batch |
| fever | N/A |
fever | JOISC 2021 | Batch |
| trivialmaths | N/A |
trivialmaths | Valentines Contest 2021 (errorgorn) | Interactive |
| summarizing2021 | N/A |
🗿🗿🗿 | Hello 2022 (errorgorn) | Interactive |
| builderswand | N/A |
Builder’s Wand | HCI NOI Selection Test 2017 | Batch |
| lemmas | N/A |
lemmas | Educational Round 1 (errorgorn) | Batch |
| cursordistance | N/A |
cursordistance | Codeforces 1246F | Batch |
| winetasting | N/A |
winetasting | LOJ #2133 | Batch |
| triusis | N/A |
Rabbit Carrot | Lithuanian Olympiad in Informatics 2019 | Batch |
| doll_noi | N/A |
doll_noi | NOI 2023 Qualification Contest (yanhao, oolimry) | Batch |
| marathon_usaco | N/A |
Marathon | USACO 2014 Dec, Gold | Batch |
| mining | N/A |
mining | Dunjudge Archive | Batch |
| football | N/A |
football | Anderson Fluff Contest (LCJLY) | Batch |
| bridge_cerc | N/A |
Bridge | CERC 2018 | Batch |
| build | N/A |
build | ABC 065D | Batch |
| medianheap | N/A |
medianheap | Dunjudge Archive | Batch |
| localexpress | N/A |
localexpress | AtCoder Typical DP Contest | Batch |
| veryeasyproblem | N/A |
veryeasyproblem | Anderson Fluff Contest (shoryu386) | Batch |
| nian | N/A |
Nian | 2020 CNY (oolimry) | Batch |
| monke | N/A |
Monke | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch |
| lasers | N/A |
lasers | NOI 2019 | Batch |
| christmaxtrees | N/A |
christmaxtrees | Codeforces 1283D | Batch |
| spiderweb | N/A |
spiderweb | Dunjudge Archive | Batch |
| sightseeing2 | N/A |
sightseeing2 | RI NOI Selection Test 2015 | Batch |
| badnim3 | N/A |
Bad Nim 3 (EE) | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch |
| railwaytrip2 | N/A |
Railway Trip 2 | JOI 2022 Final Round | Batch |
| boring | N/A |
boring | Dunjudge Archive | Batch |
| buildings | N/A |
Buildings | Dunjudge Archive | Batch |
| streetlamps_ex | N/A |
Street Lamps!! | APIO 2019 but with more pain | Batch |
| special | N/A |
special | Dunjudge Archive | Batch |
| fenwicktree_easy | N/A |
fenwicktree_easy | RI November Course 2023 Diagnostic Test (Potato3218, nianhe) | Batch |
| monochromecat | N/A |
monochromecat | ARC 097 | Batch |
| weightedguess | N/A |
Weighted Guess | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Interactive |
| hungryrabbits2 | N/A |
Hungry Rabbits 2 | RI-HCI Final Contest 2022 (bensonlzl) | Batch |
| selfstudy | N/A |
Self Study | JOI 2022 Final Round | Batch |
| towns | N/A |
Towns | IOI 2015 | Interactive |
| smurf | N/A |
smurf | RI Deccourse 2018 Selection Test (tch1001) | Batch |
| tourists | N/A |
Tourists | EGOI 2022 Day 1 | Batch |
| multiple | N/A |
multiple | Dunjudge Archive | Batch |
| flipthat | N/A |
Flip That | Codeforces 1630D | Batch |
| messenger | N/A |
messenger | Dunjudge Archive | Communication |
| bacteria | N/A |
bacteria | Dunjudge Archive | Batch |
| firefighting | N/A |
firefighting | NOI 2020 Qualification | Batch |
| collectmushrooms | N/A |
collectmushrooms | Dunjudge Archive | Batch |
| train_ioi | N/A |
Toy Train | IOI 2017 | Interactive |
| rabbitbridges | N/A |
Rabbit Bridges | Educational Round 5 (oolimry) | Batch |
| removalcosts | N/A |
Removal Costs | Dec Course 2022 BAPS (maomao90) | Batch |
| tokitsukazeandexplosion | N/A |
tokitsukazeandexplosion | Codeforces 1190E | Batch |
| railway | N/A |
railway | CPSPC 2004 | Batch |
| flowercards | N/A |
flowercards | LOJ #536 | Batch |
| travelling | N/A |
travelling | ASEAN Sparring 2022 (kevinsogo) | Batch |
| sterilizing | N/A |
sterilizing | JOI 2014/15 | Batch |
| trianglecraft | N/A |
Trianglecraft | HCI NOI Selection Test 2017 | Batch |
| rotarylock | N/A |
rotarylock | HCI NOI Selection Test 2015 | Batch |
| brick | N/A |
brick | Dunjudge Archive | Batch |
| eexploration | N/A |
Elementary Exploration | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch |
| nostatement | N/A |
nostatement | Dunjudge Archive | Batch |
| computergame | N/A |
computergame | Codeforces 1067D | Batch |
| slimes | N/A |
slimes | ABC 143C | Batch |
| alienalien | N/A |
alienalien | AOI 2023 Day 1 (shoryu386) | Batch |
| bigbinarytree | N/A |
Big Binary Tree | RI-HCI Final Contest 2022 (bensonlzl) | Batch |
| lampposts | N/A |
lampposts | Dunjudge Archive | Interactive |
| placingrouters | N/A |
Placing Routers | Codeforces 1764E | Batch |
| seats | N/A |
Seats | IOI 2018 | Interactive |
| mobitel | N/A |
Mobitel | COCI 2018/2019 | Batch |
| sumalllis | N/A |
Sum All LIS | Luogu P4484 (modified) (zaneyu) | Batch |
| markinghouses | N/A |
Marking Houses | RI-HCI Final Contest 2022 | Batch |
| warp | N/A |
warp | HCI NOI Selection Retest 2020 (bensonlzl) | Batch |
| bridge_apio15 | N/A |
Palembang Bridges | APIO 2015 | Batch |
| arrangetoys | N/A |
Arranging Toy Displays | AGC 016D | Batch |
| dinnerbox | N/A |
Jianzhi’s Dinner Box | RI NOI Selection Test 2017 | Batch |
| monopoly | N/A |
monopoly | Dunjudge Archive | Batch |
| grazing | N/A |
grazing | USACO Bronze Jan 2012 | Batch |
| lppufdsrb | N/A |
Lazy Propagation Persistent Union Find Disjoint Set with Rollbacks | Educational Round 4 (jamessng, errorgorn) | Batch |
| acorns | N/A |
acorns | MCO 2016 | Batch |
| tickets_loj | N/A |
tickets_loj | LOJ #2249 | Batch |
| seagame | N/A |
seagame | ABC 218G | Batch |
| superfanclub | N/A |
Estelle’s Super Fan Club | RI-HCI NOI Selection Test 2018 | Interactive |
| ballgame | N/A |
ballgame | Dunjudge Archive | Interactive |
| ktupleflip | N/A |
K-tuple Flip | TROC 24 (errorgorn) | Batch |
| naptime | N/A |
naptime | RI-HCI December Course Selection 2020 (cstuart) | Batch |
| islands | N/A |
Thousands Islands | IOI 2022 (Day 2) | Interactive |
| subsetmex | N/A |
Subset Mex | EGOI 2022 Day 1 | Batch |
| lopov | N/A |
lopov | COCI 2013/2014 | Batch |
| housevisit | N/A |
housevisit | CNY Contest 2019 (bensonlzl) | Batch |
| buyingcandy | N/A |
Buying Candy | ABC 308F | Batch |
| baseplans_ex | N/A |
baseplans_ex | UWCOI 2020 (socho, astoria, kimbj0709) | Batch |
| ducknuggetconvention | N/A |
Duck Nugget Convention | Valentines Contest 2021 (oolimry) | Batch |
| 0405 | N/A |
0405 | April Fools' 2021 (zaneyu) | Batch |
| election_joi | N/A |
Election Campaign | JOI Open 2015 | Batch |
| funnytree | N/A |
Funny Tree (Extreme Version) | RuCode 2020 Div A (Extreme Version) (0rang3, rs) | Batch |
| melons_joig | N/A |
Melons | JOIG 2021/2022 | Batch |
| hanabi | N/A |
hanabi | IOI Sparring 2018 SGP | Batch |
| competitiveteams | N/A |
Competitive Teams | HackerRank | Batch |
| nihonese | N/A |
nihonese | ISC 2020 practice (errorgorn) | Batch |
| bore | N/A |
Boring | Dunjudge Archive | Batch |
| synergies | N/A |
Synergies | IOI 2020 Practice Session | Batch |
| superpozicija | N/A |
superpozicija | COI 2022 | Batch |
| rainbowfish | N/A |
Rainbow Fish | Mock APIO 2015 | Batch |
| lineup2 | N/A |
Lineup | RI Problem Setter Contest 2019 (rs) | Batch |
| thanossort_st4 | N/A |
thanossort_st4 | RSA Fun Contest (errorgorn) | Interactive |
| dna | N/A |
DNA | APIO 2008 | Batch |
| breakfast | N/A |
breakfast | Dunjudge Archive | Batch |
| delivery | N/A |
delivery | Dunjudge Archive | Batch |
| plants | N/A |
Comparing Plants | IOI 2020 | Interactive |
| jumper | N/A |
Manhattan Jumper | HCI-NUSH NOI Selection 2022 (errorgorn) | Batch |
| optmilk | N/A |
Optimal Milking | Dunjudge Archive | Batch |
| leave | N/A |
leave | Dunjudge Archive | Batch |
| zamjena | N/A |
zamjena | COCI 2018/2019 | Batch |
| applefarm | N/A |
applefarm | NUSH ISC 2020 (oolimry) | Batch |
| penghulu | N/A |
Penghulu | MCO 2016 | Batch |
| 1609 | N/A |
1609 | April Fools' 2021 (0rang3) | Batch |
| learningtrack | N/A |
learningtrack | LOJ #2773 | Batch |
| spy | N/A |
spy | 2013 IOI Japan National Team Selection Test Day 2 | Batch |
| xmas | N/A |
xmas | NOI 2009 | Batch |
| smallprimes | N/A |
Small Primes | Classic Problem | Batch |
| buycomputer | N/A |
buycomputer | Dec Trg 2019 (Elementary) (errorgorn) | Batch |
| rating | N/A |
Rating Changes | Dec Trg 2019 (Elementary) | Batch |
| devour | N/A |
devour | HCI November Final Contest 2023 (penguin133) | Batch |
| manymsts | N/A |
manymsts | LOJ #3635 | Batch |
| ping | N/A |
ping | RI HCI NOI Selection 2019 Practice (bensonlzl) | Interactive |
| gerrymandering | N/A |
Gerrymandering | Dec Course 2021 BAPS (beepbeepsheep) | Batch |
| bombing | N/A |
bombing | Dunjudge Archive | Batch |
| mountainbridges | N/A |
mountainbridges | HCI November Final Contest 2023 (huangqr) | Batch |
| segmenttree3 | N/A |
segmenttree3 | Dec Course 2021 Intermediate Contest 4 (Data Structures III) (errorgorn, oolimry) | Batch |
| problematicjourney | N/A |
Problematic Journey | Classic Problem | Batch |
| fruits | N/A |
fruits | Dunjudge Archive | Batch |
| island_boi | N/A |
island | BOI 2022 | Batch |
| usefft4 | N/A |
Use FFT 4 | Valentine's Day Contest 2022 (errorgorn) | Batch |
| wires | N/A |
Wires | RI-HCI NOI Selection Test 2019 (bensonlzl) | Interactive |
| compact | N/A |
compact | Dunjudge Archive | Batch |
| reverseandmin | N/A |
reverseandmin | ARC142A | Batch |
| climatechange | N/A |
climatechange | Dunjudge Archive | Batch |
| 7up | N/A |
7up | RI November Course Stage 2 Selection Test 2019 | Batch |
| smurfpaths | N/A |
smurfpaths | RI-HCI NOI Selection Test 2020 (rs) | Batch |
| cards | N/A |
cards | Dunjudge Archive | Batch |
| magiccarps | N/A |
magiccarps | ANDSS Contest 2 (Greedy and Bruteforce) (shoryu386) | Batch |
| papaya | N/A |
papaya | Dunjudge Archive | Batch |
| ippt | N/A |
IPPT | Dec Course 2023 Selection Test (errorgorn) | Batch |
| heatwv | N/A |
Heat Wave | Dunjudge Archive | Batch |
| general | N/A |
general | Classic Problem | Batch |
| village | N/A |
village | BOI 2020 | Batch |
| newjeans | N/A |
Bob's New Jeans | Codeforces 868F | Batch |
| wabbitosu | N/A |
Wabbit osu!taiko | HCI December Course Selection 2021 (bensonlzl) | Batch |
| spellofweakness | N/A |
Spell Of Weakness | Dunjudge Archive (dantoh) | Batch |
| lost | N/A |
Jianzhi’s Lost | RI NOI Selection Test 2017 | Interactive |
| rabbitpainting | N/A |
rabbitpainting | Dunjudge Archive (bensonlzl) | Batch |
| digits | N/A |
digits | Deccourse 2021 DS II Contest (errorgorn) | Batch |
| lol | N/A |
lol | Dunjudge Archive | Batch |
| lengthsort | N/A |
lengthsort | Dunjudge Archive | Batch |
| qualityinspections | N/A |
qualityinspections | ANDSS Coding Head Sel 2023 Duel (penguin133, shoryu386) | Batch |
| cookieclickeralpha | N/A |
cookieclickeralpha | Google Code Jam 2014 | Batch |
| primesort | N/A |
Prime Sort | Dunjudge Archive | Batch |
| cowland | N/A |
Cow Land | USACO 2019 February Contest, Gold | Batch |
| usefft2 | N/A |
Use FFT 2 | Valentine's Day Contest 2022 (errorgorn) | Batch |
| competition | N/A |
competition | NOI 2021 Qualification | Batch |
| peakfinding | N/A |
Peak Finding | UWCOI 2020 (socho, astoria, kimbj0709) | Batch |
| cakeslicing | N/A |
cakeslicing | LOJ #6744 | Batch |
| treasures | N/A |
Stolen Treasures | Dunjudge Archive | Batch |
| SameMapInTheRpgWorld | N/A |
samemap | ABC 300B | Batch |
| parade | N/A |
parade | Dunjudge Archive | Batch |
| ants | N/A |
ants | Dunjudge Archive | Interactive |
| assignpaths | N/A |
assignpaths | USACO 2020 February Contest, Platinum | Batch |
| arrayproblem | N/A |
arrayproblem | Codeforces | Batch |
| countalp | N/A |
countalp | Classic Problem | Batch |
| events | N/A |
events | BOI 2022 | Batch |
| gecko | N/A |
gecko | NOI 2008 | Batch |
| magick | N/A |
Magick | RI-HCI NOI Selection Test 2019 | Communication |
| candies_joi | N/A |
candies_joi | JOI 2017/2018 Spring Camp | Batch |
| change | N/A |
change | NOI 2011 | Batch |
| bobek | N/A |
bobek | CEOI 2015 | Batch |
| persistentlists | N/A |
Persistent Lists | Educational Round 6 (oolimry) | Batch |
| hedgehogcrimes_easy | N/A |
Hedgehog Crimes (Easy Version) | Classic Problem | Batch |
| countedges | N/A |
Counting Edges | USACO 2021 February Contest, Platinum | Batch |
| chefmala | N/A |
chefmala | CodeChef February Lunchtime 2022 (errorgorn) | Batch |
| pastiri | N/A |
pastiri | COI 2019/2020 | Batch |
| supermarket | N/A |
supermarket | RI Dec Course Sel 2017 | Batch |
| scalars | N/A |
scalars | Dunjudge Archive | Batch |
| mooshroomfarm | N/A |
Mooshroom Farm | HCI NOI Selection Test 2017 | Batch |
| fertile | N/A |
fertile | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch |
| redstonelamps | N/A |
Redstone Lamps | HCI NOI Selection Test 2017 | Batch |
| journey3 | N/A |
Journey | NOI 2018 | Batch |
| mathtest | N/A |
mathtest | Dunjudge Archive | Batch |
| modules | N/A |
modules | NUSH NOI Selection Test 2018 | Batch |
| noodlestore | N/A |
noodlestore | HCI EC³ Beginner Contest (WH8) | Batch |
| badchef | N/A |
Bad Chef | NUS CS3233 2020 (Kattis) | Batch |
| styles | N/A |
Styles | IOI 2020 Practice Session | Batch |
| party | N/A |
party | Dunjudge Archive | Batch |
| roads | N/A |
Road Closures | APIO 2021 | Interactive |
| bananadance | N/A |
bananadance | Dunjudge Archive | Batch |
| suffixarray | N/A |
Oolimry and Suffix Array | Codeforces Round 723 (zaneyu) | Batch |
| iqtest | N/A |
iqtest | Valentine's Day Contest 2022 (errorgorn) | Batch |
| minimetro | N/A |
Minimetro | HCI December Course Selection 2021 (huangqr) | Batch |
| taxes | N/A |
taxes | December Course 2018 Advanced Final Contest, ROI 2018 Day 1 | Batch |
| flowering | N/A |
flowering | COCI 2008/2009 | Batch |
| trivialexam_ex | N/A |
trivialexam_ex | April Fools 2023 (Xiaoyang) | Batch |
| squaregraph | N/A |
Square Graph | AGC 011C | Batch |
| bosubaiko | N/A |
Bosu Baiko | Educational Round 6 (errorgorn) | Batch |
| splithunny | N/A |
splithunny | Dunjudge Archive | Batch |
| mercurypoisoning | N/A |
Mercury Poisoning | UWCOI 2020 (socho, astoria, kimbj0709) | Batch |
| bunchlocks | N/A |
bunchlocks | Dunjudge Archive | Batch |
| watching | N/A |
watching | JOI Open 2013 | Batch |
| pancake | N/A |
pancake | NOI 2012 | Batch |
| wallisstop | N/A |
Wall Is Stop | Dunjudge Archive (bensonlzl) | Batch |
| treepainting | N/A |
treepainting | LOJ #2001 | Batch |
| toxicwaste | N/A |
Toxic Waste | Dunjudge Archive | Batch |
| socialdistance | N/A |
Social Distance | Codeforces 1381D | Batch |
| beareatrabbit | N/A |
Bear Eat Rabbit | Classic Problem | Batch |
| guessproblem3 | N/A |
Guess Problem 3 | April Fools 2023 (ecxx) | Batch |
| obstacletree | N/A |
obstacletree | Codeforces 1528A | Batch |
| uniquenumbers | N/A |
uniquenumbers | Classic Problem | Batch |
| evenorodd | N/A |
evenorodd | Classic Problem | Batch |
| gotoubun | N/A |
gotoubun | folklore (errorgorn) | Batch |
| lboard | N/A |
L-Board | NOI 2022 Qualification | Batch |
| switches | N/A |
switches | Educational Round 7 (myrcella, errorgorn) | Batch |
| potionseasy | N/A |
Potions (Easy Version) | Codeforces Round 723 (errorgorn, oolimry) | Batch |
| shortest | N/A |
shortest | Dunjudge Archive | Batch |
| mars | N/A |
Mars | APIO 2022 | Interactive |
| consistency | N/A |
Consistency | RI-HCI NOI Selection Test 2019 (bensonlzl) | Batch |
| royalguards | N/A |
royalguards | AMOS OI 2022 (buffed) (shoryu386) | Batch |
| sculptures_apio15 | N/A |
Bali Sculptures | APIO 2015 | Batch |
| pandacity | N/A |
pandacity | Dunjudge Archive | Batch |
| swayingflowers | N/A |
swayingflowers | ANDSS Welcome 2023 (Day 1) (shoryu386) | Batch |
| firstabc | N/A |
firstabc | ABC 311A | Batch |
| doll | N/A |
Mechanical Doll | IOI 2018 | Interactive |
| diesel | N/A |
diesel | NOI 2013 | Batch |
| messy | N/A |
Unscrambling a Messy Bug | IOI 2016 | Interactive |
| tents | N/A |
Tents | JOI 2017/2018 Spring Camp | Batch |
| canbashsavetheday | N/A |
canbashsavetheday | Codeforces 757G | Batch |
| firelord | N/A |
firelord | RI Nov Sel 2020 (jiahng) | Batch |
| multipaths | N/A |
Multiple Paths | Dunjudge Archive | Batch |
| routine | N/A |
Routine Cat | RI November Course Stage 2 Selection Test 2022 (wangy412) | Batch |
| virus | N/A |
virus | JOISC 2017, Day 1 | Batch |
| dogmonkey | N/A |
dogmonkey | ABC 065C | Batch |
| fabric | N/A |
fabric | NOI 2016 | Batch |
| linearbasis | N/A |
linearbasis | Hello 2022 (errorgorn) | Batch |
| chope | N/A |
Chope | ARC 152A | Batch |
| sarenlist | N/A |
sarenlist | COCI 2021/2022 | Batch |
| teams | N/A |
Teams | IOI 2015 | Interactive |
| cardgame | N/A |
cardgame | Dunjudge Archive | Batch |
| lualectures | N/A |
Lua Lectures | Classic Problem | Batch |
| samelength | N/A |
Same Length | Hello 2021 (errorgorn) | Batch |
| deciphering_zane_ex | N/A |
Decusohrting Znakeje: extendied c34s8hb | April Fools 2023 (ecxx, Xiaoyang, leyi) | Interactive |
| switches998244353 | N/A |
switches998244353 (EE) | Educational Round 7 (errorgorn) | Batch |
| pandanumbers | N/A |
Numbers | Dunjudge Archive | Batch |
| rmq | N/A |
rmq | NOI 2017 | Batch |
| cudak | N/A |
cudak | COCI 2007/2008 | Batch |
| candies | N/A |
candies | Dunjudge Archive | Batch |
| addsubtract | N/A |
addsubtract | Dunjudge Archive | Batch |
| primepie | N/A |
primepie | Dunjudge Archive | Interactive |
| bossbattle | N/A |
Boss Battle | Classic Problem in China | Batch |
| forkintheroad | N/A |
forkintheroad | AtCoder | Batch |
| tournament | N/A |
tournament | IOI 2012 | Interactive |
| network | N/A |
network | NOI 2023 Qualification Contest (errorgorn) | Batch |
| doors | N/A |
Doors | Dunjudge Archive | Batch |
| vouchers | N/A |
vouchers | Dunjudge Archive | Batch |
| lemonadestand | N/A |
lemonadestand | Dunjudge Archive | Batch |
| binaryspells | N/A |
binaryspells | ANDSS Contest 2 (Greedy and Bruteforce) (shoryu386) | Batch |
| books | N/A |
Ancient Books | IOI 2017 | Interactive |
| carrots | N/A |
carrots | Codeforces Raif Round 1 (errorgorn) | Batch |
| kronecker | N/A |
kronecker | Valentine's Day Contest 2022 (errorgorn) | Batch |
| routes | N/A |
routes | Dunjudge Archive | Batch |
| cycling | N/A |
cycling | Dunjudge Archive | Batch |
| baseplans | N/A |
Base Plans | UWCOI 2020 (socho, astoria, kimbj0709) | Batch |
| sillysort | N/A |
sillysort | info(1) cup 2019 (modified) (errorgorn) | Batch |
| holeetree | N/A |
\( H^{o^{L^{e^e_e}_{e^e_e}}_{L^{e^e_e}_{ e^e_e}}}_{o^{L^{e^e_e}_{ e^e_e}}_{L^{e^e_e}_{e^e_e}}} \) 🎄 | Hello 2022 (errorgorn) | Batch |
| rblock | N/A |
rblock | USACO 2011 December Contest, Silver Division | Batch |
| growingtrees | N/A |
growingtrees | BOI 2011 | Batch |
| travel | N/A |
Travel | CCO 2015 | Batch |
| puttingstrings | N/A |
puttingstrings | RI-HCI December Course Selection 2020 (rs) | Batch |
| addition | N/A |
Addition of 2 numbers | Classic problem | Batch |
| frogs | N/A |
Frogs | Winter Computer School 2010/11 Team Contest #1 | Batch |
| railroad | N/A |
Roller Coaster Railroad | IOI 2016 | Interactive |
| mathtree | N/A |
Math Tree | SGP Sparring 2021 (lovemathboy) | Batch |
| luckynumbers | N/A |
Lucky Numbers | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch |
| tourist | N/A |
tourist | IOI 2012 Practice Tasks | Batch |
| boxes | N/A |
Boxes with souvenirs | IOI 2015 | Interactive |
| chinese | N/A |
chinese | Dunjudge Archive | Batch |
| dungeons2 | N/A |
dungeons2 | AGM 2021, Final Round, Day 2 | Batch |
| pawns | N/A |
e4e5 Ke2? Ke7? | TROC 24 (maomao90, errorgorn) | Batch |
| wallabyhop | N/A |
Wallaby Hop | RI December Course Selection Test 2021 (jiahng) | Batch |
| closingshop | N/A |
Closing Shop | Codeforces 721C | Batch |
| convention | N/A |
convention | USACO 2018 December Silver | Batch |
| onlineexam | N/A |
Online Exam | April Fools 2023 (zengminghao) | Interactive |
| superpiece | N/A |
Superpiece | EGOI 2022 Day 2 | Batch |
| paintbyrectangles | N/A |
paintbyrectangles | USACO 2022 Feb, Platinum | Batch |
| sequence_apio | N/A |
Split the sequence | APIO 2014 | Batch |
| goodsubsegments | N/A |
goodsubsegments | Codeforces Round #493 (Div. 1) | Batch |
| solarstorm | N/A |
Solar Storm | NOI 2020 Prelims | Batch |
| findandprevent | N/A |
Find and Prevent | Tuymaada 2021 | Batch |
| twomeals | N/A |
twomeals | Dunjudge Archive | Batch |
| smallprimes_ex | N/A |
Small Primes? | Classic Problem? | Batch |
| splittingtree | N/A |
Splitting Tree | LOJ P3213 | Batch |
| pavement | N/A |
Painting Pavements | HCI December Course Selection 2021 (pavement) | Batch |
| qualitytime | N/A |
Quality Time | Codeforces 922E | Batch |
| lcs | N/A |
lcs | Classic problem | Batch |
| thesis | N/A |
thesis | LOJ #511 | Batch |
| unmerge | N/A |
Unmerge | Codeforces 1381B | Batch |
| ballsofbuma | N/A |
Balls of Buma | Dunjudge Archive | Batch |
| pairsums | N/A |
Button Pairs | UWCOI 2020 (socho, astoria, kimbj0709) | Batch |
| ninjashard | N/A |
Ninjas (Hard) | TROC 24 (oolimry, errorgorn) | Batch |
| orlando | N/A |
orlando | RI Problem Setter Contest 2019 (zhuan, 0rang3) | Batch |
| stagegames_part1 | N/A |
Estelle’s Stage Games (Subtasks 1 - 5) | RI-HCI NOI Selection Test 2018 | Interactive |
| candles | N/A |
candles | ABC 107C | Batch |
| alien10 | N/A |
alien10 | uwu (errorgorn) | Batch |
| addk | N/A |
addk | EJOI 2021 | Batch |
| reopening | N/A |
Reopening Shop | Dec Course 2022 BAPS (errorgorn, Halogen) | Batch |
| flood | N/A |
Flood | POI 2018 Round 1 Q3 | Batch |
| generosity | N/A |
Generosity | April Fools' 2022 (oolimry) | Batch |
| paleta | N/A |
paleta | COCI 2013/2014 | Batch |
| badnim | N/A |
badnim | Educational Round 7 (errorgorn) | Batch |
| merchant_o | N/A |
Merchant Otter | Dec Course 2020 BAPS (myrcella) | Batch |
| knapsack2 | N/A |
knapsack2 | David Pisinger (1995) | Batch |
| kucice | N/A |
kucice | COCI 2021/2022 | Batch |
| boxoffice | N/A |
Box Office | Dunjudge Archive | Batch |
| sumo | N/A |
sumo | COCI 2013/2014 | Batch |
| primefactorization | N/A |
primefactorization | Dunjudge Archive | Batch |
| rabbittolls | N/A |
rabbittolls | Dunjudge Archive | Batch |
| queuestack | N/A |
Queuestack | Educational Round 10 (Goodbye cstuart and kai824) (lida, oolimry, cstuart) | Batch |
| payraise | N/A |
payraise | Dunjudge Archive | Batch |
| lambsrespite | N/A |
Lamb's Respite | XXII Open Cup. Grand Prix of Korea | Batch |
| lunchtime | N/A |
Lunchtime | ARC 162A | Batch |
| moosic | N/A |
moosic | Codeforces Round #386 | Batch |
| deliveroo | N/A |
Deliveroo | RI November Course Stage 2 Selection Test 2021 (Deadeye) | Batch |
| pancake_ex | N/A |
Pancake (Extreme) | Classic Problem | Batch |
| guessproblem2 | N/A |
Guess Problem 2 | April Fools 2023 (ryangohca) | Batch |
| appeal | N/A |
appeal | Dunjudge Archive | Batch |
| hyperoperations | N/A |
hyperoperations | Dunjudge Archive | Batch |
| spiraldance | N/A |
Estelle’s Spiral Dance | RI-HCI NOI Selection Test 2018 | Batch |
| rabbitbars | N/A |
rabbitbars | Dunjudge Archive (bensonlzl) | Batch |
| dragonfly | N/A |
dragonfly | NOI 2022 Qualification (bensonlzl) | Batch |
| inversemax | N/A |
inversemax | Educational Round 3 (errorgorn) | Batch |
| duckwar | N/A |
duckwar | Anderson Fluff Contest (shoryu386) | Batch |
| reachability | N/A |
reachability | Classic Problem | Batch |
| lcm | N/A |
lcm | Classic Problem | Batch |
| goinghome_agc | N/A |
goinghome_agc | AGC 023 | Batch |
| sawmills | N/A |
Two Sawmills | CEOI 2004 | Batch |
| badnim2 | N/A |
Bad Nim 2 (EE) | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch |
| joke | N/A |
Joke | Dec Trg 2019 (Elementary) | Batch |
| numbers | N/A |
Palindrome-Free Numbers | BOI 2013 | Batch |
| relaymarathon | N/A |
relaymarathon | NOI 2020 Qualification | Batch |
| movingboxes | N/A |
movingboxes | Codeforces 1030F | Batch |
| avoidcollision | N/A |
avoidcollision | ARC 090C | Batch |
| cups | N/A |
cups | Deccourse 2021 DS II Contest (errorgorn) | Batch |
| treecutting | N/A |
Tree Cutting | NOI 2022 Qualification | Batch |
| coinjourney | N/A |
Coin Journey | RI November Course Stage 2 Selection Test 2021 (kym) | Batch |
| duckduckgo | N/A |
duckduckgo | Codeforces 1091F | Batch |
| selfdefence | N/A |
Self Defence | TOKI KSN Day 1 | Batch |
| cheerleaders | N/A |
cheerleaders | Atcoder Educational DP Contest | Batch |
| robot2 | N/A |
robot2 | Dunjudge Archive | Batch |
| urbanplanning | N/A |
urbanplanning | IZhO 2022 | Batch |
| prize | N/A |
The Big Prize | IOI 2017 | Interactive |
| sardines | N/A |
sardines | RI NOI Selection Test 2014 | Batch |
| treeinteger | N/A |
treeinteger | ARC 063E | Batch |
| oenothera | N/A |
oenothera | Codeforces 1039E | Batch |
| sjeckanje | N/A |
sjeckanje | COCI 2020/2021 | Batch |
| souvenirs2 | N/A |
souvenirs2 | ARC 068C | Batch |
| diamond | N/A |
diamond | Classic Problem | Batch |
| industriouslibrarian | N/A |
industriouslibrarian | LOJ #2639 | Batch |
| jumps | N/A |
Rainforest Jumps | APIO 2021 (bensonlzl) | Interactive |
| greenbeans | N/A |
Green Beans Mayhem | RI November Course Stage 2 Selection Test 2021 (ryangohca, kym) | Batch |
| hotspot | N/A |
hotspot | NOI 2017 | Batch |
| history | N/A |
history | Dunjudge Archive | Batch |
| smurfberries | N/A |
smurfberries | All-Ukrainian School Olympiad in Informatics 2011 | Batch |
| lightsflip | N/A |
lightsflip | Dunjudge Archive | Batch |
| 01knapsack | N/A |
0-1 Knapsack | Classic problem (Atcoder Educational DP Contest) | Batch |
| catgameshow | N/A |
catgameshow | RI/RJC NOI Selection Test 2016 | Batch |
| duckwander | N/A |
duckwander | ANDSS Contest 1 (Syntax) (shoryu386) | Batch |
| doubletrouble | N/A |
Double Trouble | Dec Trg 2019 (Elementary) (oolimry) | Batch |
| buycoke | N/A |
Buying Coke | Kattis | Batch |
| prime | N/A |
Prime Numbers | Classic Problem | Batch |
| preciseforecast | N/A |
preciseforecast | LOJ #3101 | Batch |
| hackthectf | N/A |
hackthectf | HCI EC³ Beginner Contest (blackscreen1, shoryu386) | Batch |
| summit | N/A |
summit | Dunjudge Archive | Batch |
| shopping | N/A |
Shopping | Dunjudge Archive | Batch |
| sudoku | N/A |
sudoku | NOI 2015 | Batch |
| guessproblem4 | N/A |
Guess Problem 4 | April Fools 2023 (ryangohca, ecxx) | Interactive |
| oridance | N/A |
Orientation Dance | Codeforces 1509C | Batch |
| garden | N/A |
Garden Cat | RI November Course Stage 2 Selection Test 2022 (tux, ryangohca) | Batch |
| departure | N/A |
departure | NOI 2021 Qualification | Batch |
| outing | N/A |
Outing | Educational Round 10 (Goodbye cstuart and kai824) (kai824) | Batch |
| historical | N/A |
Historical | JOI 2013/2014 | Batch |
| stonk | N/A |
Stonks | Dec Trg 2019 (Elementary) (shenxy13) | Batch |
| mugger | N/A |
mugger | RI Problem Setter Contest 2019 (ngmh) | Batch |
| goodgame | N/A |
goodgame | ARC 072D | Batch |
| threetwentyoneam | N/A |
threetwentyoneam | AOI 2023 Day 1 (shoryu386) | Batch |
| neckties | N/A |
Just Long Neckties | JOI 2020 Final Round | Batch |
| learningtrack2 | N/A |
learningtrack2 | LOJ #3068 | Batch |
| snowcow | N/A |
Snowcow | USACO 2019 December Contest Platinum | Batch |
| sightseeing | N/A |
sightseeing | NOI 2014 | Batch |
| biscuits | N/A |
Packing Biscuits | IOI 2020 (Day 2) | Interactive |
| gridgame | N/A |
gridgame | Dunjudge Archive | Batch |
| bosses | N/A |
bosses | BOI 2016 | Batch |
| hunterxhunter | N/A |
hunterxhunter | International Autumn Tournament in Informatics 2020 | Batch |
| dateornot | N/A |
Date Or Not? | Dunjudge Archive | Interactive |
| bichrome | N/A |
bichrome | Atcoder | Batch |
| watchmen | N/A |
watchmen | BOI 2021 | Batch |
| deforestation | N/A |
deforestation | HCI November Final Contest 2023 (TheRaptor) | Batch |
| coolslogans | N/A |
coolslogans | LOJ #6288 | Batch |
| rarwall | N/A |
rarwall | Dunjudge Archive | Interactive |
| poklon | N/A |
poklon | COCI 2016/2017 | Batch |
| fenwicktree | N/A |
fenwicktree | Classic Problem | Batch |
| fencing2 | N/A |
fencing2 | RI-HCI December Course Selection 2020 (errorgorn) | Batch |
| commando | N/A |
commando | APIO 2010 | Batch |
| switchandflip | N/A |
Switch and Flip | Codeforces Global Round 13 (errorgorn, oolimry) | Batch |
| nextprime | N/A |
nextprime | NASS CP Club Training Contest 1 | Batch |
| present | N/A |
present | RMI 2021 | Batch |
| cattown | N/A |
Cat Town | RI/RJC NOI Selection Test 2016 | Batch |
| fencing3 | N/A |
fencing3 | Educational Round 3 (errorgorn, tqbfjotld) | Batch |
| banks | N/A |
Banks | IOI 2020 Practice Session | Batch |
| orchard | N/A |
orchard | NOI 2014 | Batch |
| swords | N/A |
swords | NOI 2023 Qualification Contest (yanhao) | Batch |
| lineup | N/A |
lineup | USACO Silver Nov 2011 | Batch |
| masquerade | N/A |
masquerade | BZOJ 1064 | Batch |
| trains_mco | N/A |
trains_mco | MCO 2015 | Batch |
| redistributinggifts | N/A |
redistributinggifts | USACO 2022 Feb Gold | Batch |
| notebook | N/A |
notebook | Dunjudge Archive | Batch |
| scales | N/A |
Scales | IOI 2015 | Interactive |
| brackets | N/A |
Bracket Subsequence | Classic Problem (zengminghao) | Batch |
| valves | N/A |
Valves | Dec Course 2022 BAPS (beepbeepsheep) | Batch |
| eeducation | N/A |
Elementary Education | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch |
| sequence_apio23 | N/A |
Sequence | APIO 2023 | Interactive |
| clique | N/A |
clique | Algorithm Class Mini-Contest 8 | Batch |
| boxes_hkicpc | N/A |
Boxes | 2016 ACM ICPC Asia Hong Kong Regional | Batch |
| edgeflip | N/A |
Edge Flipping | Educational Round 4 (jamessng) | Batch |
| bananafever | N/A |
bananafever | Dunjudge Archive | Batch |
| paint | N/A |
paint | NOI 2011 | Batch |
| wall | N/A |
wall | IOI 2014 | Interactive |
| exam | N/A |
Exam | RI Nov Sel 2020 (syy) | Batch |
| rabbitmeeting | N/A |
RabbitMeeting | December Course 2018 Advanced Final Contest | Batch |
| spaceinvaders | N/A |
spaceinvaders | Educational Round 1 (bensonlzl) | Batch |
| leastround | N/A |
leastround | Codeforces 2B | Batch |
| lis_easy | N/A |
lis_easy | Classic problem | Batch |
| armpit | N/A |
armpit | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch |
| chickensoup | N/A |
chickensoup | ABC 256F | Batch |
| mirrortree | N/A |
mirrortree | BOI 2011, Day 2 | Batch |
| xorsplit | N/A |
xorsplit | Valentine's Day Contest 2023 (blackscreen1, pavement, maomao90, zaneyu) | Batch |
| missingnumber | N/A |
Missing Number | CSES | Batch |
| stackweights | N/A |
stackweights | CSES Problem Set | Batch |
| grid | N/A |
Grid | Atcoder Educational DP Contest | Batch |
| segmentoperations | N/A |
Segment Operations | Codeforces 1743F | Batch |
| flappyrabbit | N/A |
Flappy Rabbit | HCI-NUSH NOI Selection 2022 (pavement) | Interactive |
| modulochain | N/A |
modulochain | Anderson Trg (shoryu386) | Batch |
| hellokitty | N/A |
hellokitty | Dunjudge Archive | Batch |
| knightmoves | N/A |
knightmoves | Dunjudge Archive | Batch |
| humantrafficking | N/A |
Human Trafficking | Italian Informatics Olympiad | Batch |
| xortree | N/A |
xortree | Classic Problem (errorgorn) | Batch |
| burgers | N/A |
burgers | NOI 2023 Qualification Contest (oolimry, bensonlzl, yanhao) | Batch |
| basketball | N/A |
basketball | NUSH ISC 2020 (dantoh) | Batch |
| UCFJ | N/A |
UCFJ | USACO 2021 US Open, Platinum | Batch |
| lowelements | N/A |
lowelements | ABC 152C | Batch |
| paint_ioi | N/A |
Paint By Numbers | IOI 2016 | Interactive |
| collectmushrooms4 | N/A |
collectmushrooms4 | Dunjudge Archive | Batch |
| schedule | N/A |
schedule | HCI NOI Selection Test 2014 | Batch |
| oranges2 | N/A |
oranges2 | RI Deccourse 2018 Selection Test (0rang3) | Batch |
| workload_ex | N/A |
workload_ex | Classic Problem in China (Probably) (errorgorn) | Batch |
| skyline | N/A |
skyline | HCI NOI Selection Retest 2020 (bensonlzl) | Batch |
| eelimination | N/A |
Elementary Elimination | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch |
| ratar | N/A |
ratar | COCI 2013/2014 | Batch |
| 1503 | N/A |
1503 | April Fools' 2021 (jamielim) | Batch |
| digitsum | N/A |
digitsum | UOJ Easy Round #4 | Batch |
| chunlian | N/A |
chunlian | Dunjudge Archive | Batch |
| homeworkextension | N/A |
homeworkextension | ANDSS Contest 1 (Syntax) (Josh28) | Batch |
| findinggrass_ex | N/A |
Helping an ex-cs student touch grass while blindfolded with my insane programming skills in another world | April Fools 2023 (siewjh) | Batch |
| iqtest3 | N/A |
iqtest3 | AGC 50A | Batch |
| exhibition | N/A |
Exhibition | JOI 2018/2019 Final Round | Batch |
| 727 | N/A |
727 | HCI-NUSH NOI Selection 2022 (errorgorn) | Batch |
| ljll | N/A |
LJLL | NUSH ISC 2020 (errorgorn) | Batch |
| killanton_ex | N/A |
killanton_ex | Valentine's Day Contest 2022 (errorgorn) | Batch |
| newlottery | N/A |
New Lottery | Google Code Jam 2014 | Batch |
| fire | N/A |
fire | JOI 2020 Final Round | Batch |
| bombing2 | N/A |
bombing2 | Dunjudge Archive | Batch |
| ballot | N/A |
ballot | Dunjudge Archive | Batch |
| tomskitchen | N/A |
Tom’s Kitchen | BOI 2019 Day 2 | Batch |
| sandcastle2 | N/A |
Sandcastle 2 | JOI 2022 Final Round | Batch |
| container | N/A |
Shipping Containers | POI 2017 Round 2 Day 2 Q1 | Batch |
| gate | N/A |
gate | LOJ #2474 | Batch |
| fruitsequences | N/A |
Fruit Sequences | Codeforces Raif Round 1 (bensonlzl) | Batch |
| thunderstorm | N/A |
Thunderstorm | Dec Trg 2019 (Elementary) | Batch |
| convexhull | N/A |
Convex Hull | Classic Problem (ryangohca) | Batch |
| divsum | N/A |
Divisor Sum | Educational Round 1 (errorgorn) | Batch |
| fibo | N/A |
Fibonacci | Classic Problem | Batch |
| nevergiveup | N/A |
Never Give Up | April Fools 2023 (bron, penguin133) | Batch |
| happyarrays | N/A |
Happy Arrays | Classic Problem (penguin133) | Batch |
| mandarins | N/A |
Mandarins | 2020 CNY | Batch |
| snapknack | N/A |
snapknack | Dunjudge Archive | Batch |
| messages | N/A |
Messages | Valentine's Day Contest 2023 (beepbeepsheep) | Communication |
| intercastellar | N/A |
Intercastellar | JOI 2022 Final Round | Batch |
| management | N/A |
Management | ABC163C | Batch |
| duckwalk | N/A |
duckwalk | Codeforces 76F | Batch |
| wiring | N/A |
Fix Wiring | Polish Collegiate Programming Contest 2021 | Batch |
| hamster1 | N/A |
Hamster's Journey | Atcoder Educational DP Contest | Batch |
| magicwand | N/A |
magicwand | Dunjudge Archive | Batch |
| rectangleoutline | N/A |
Rectangle Outline | USACO 2016 January Contest, Platinum | Batch |
| rookable | N/A |
Rookable | NUSH NOI Selection Test 2018 | Batch |
| justright | N/A |
justright | Dunjudge Archive | Batch |
| sunshine | N/A |
Sunshine | RI Novcourse Final Contest 2023 (zixuan, ryangohca) | Batch |
| mememagic | N/A |
mememagic | Dunjudge Archive | Batch |
| christmastree | N/A |
Christmas Tree | Educational Round 2 (errorgorn, oolimry) | Batch |
| boomerangs | N/A |
Bouncing Boomerangs | Codeforces Raif Round 1 (bensonlzl) | Batch |
| ladybugs | N/A |
ladybugs | Dunjudge Archive | Batch |
| math | N/A |
Primes Up | April Fools Contest 2020 (shenxy13) | Batch |
| boat | N/A |
Boat | APIO 2016 | Batch |
| animaleditor | N/A |
animaleditor | MCO | Batch |
| specialmultiset | N/A |
specialmultiset | Codeforces 981G | Batch |
| friendcross | N/A |
friendcross | USACO 2017 Feb Plat | Batch |
| toy | N/A |
toy | ROI 2014 | Batch |
| lostarray | N/A |
Lost Array | NOI 2019 Prelims | Batch |
| friendlyrooks | N/A |
Friendly Rooks | 2022 December Course Diagnostic Test (errorgorn) | Batch |
| quillvsowl | N/A |
Quill Vs Owl | Dec Course 2020 BAPS (jamielim) | Batch |
| snukethewizard | N/A |
snukethewizard | AtCoder | Batch |
| guessarray | N/A |
4sadfaces Guessing an Array | Dec Course 2020 BAPS (zaneyu) | Interactive |
| cellulardata | N/A |
Cellular Data | IOI 2020 Practice Session | Batch |
| steeple | N/A |
Cow Steeplechase | USACO 2011 Nov, Gold | Batch |
| catteams | N/A |
catteams | RI/RJC NOI Selection Test 2016 | Batch |
| wiring_ioi | N/A |
Wiring | IOI 2017 | Interactive |
| 3nplus1 | N/A |
3nplus1 | Classic Problem | Batch |
| lunchcombo | N/A |
lunchcombo | RI November Course Stage 2 Selection Test 2019 | Batch |
| figures | N/A |
Figures | IOI 2020 Practice Session | Batch |
| rightangtri | N/A |
rightangtri | Classic Problem | Batch |
| constellation2 | N/A |
constellation2 | JOISC 2014 | Batch |
| rainbowrabbit | N/A |
rainbowrabbit | RI-HCI December Course Selection 2019 (bensonlzl) | Batch |
| potatosalad | N/A |
potatosalad | Classic Problem | Batch |
| collectmushrooms3 | N/A |
collectmushrooms3 | Dunjudge Archive | Batch |
| firecracker | N/A |
firecracker | CNY Contest 2019 | Batch |
| rooms | N/A |
rooms | RI Mock NOI 2015 | Batch |
| rabbitgifts | N/A |
rabbitgifts | December Course 2018 Advanced Final Contest | Batch |
| bitaro | N/A |
Bitaro's Party | JOI 2017/2018 Spring Camp | Batch |
| ancestor | N/A |
ancestor | Classic problem | Batch |
| manycolours | N/A |
manycolours | ABC 133 | Batch |
| rabbitplane | N/A |
rabbitplane | RI Problem Setter Contest 2019 (bensonlzl) | Batch |
| sherlockgraph | N/A |
sherlockgraph | HackerRank | Batch |
| springtrap | N/A |
springtrap | Educational Round 1 (bensonlzl) | Batch |
| more_lca2 | N/A |
More LCA 2 | Educational Round 10 (Goodbye cstuart and kai824) (cstuart) | Interactive |
| mincross_usaco | N/A |
mincross_usaco | USACO 2017 Feb, Platinum | Batch |
| trains | N/A |
trains | Dunjudge Archive | Batch |
| milkweed | N/A |
milkweed | Dunjudge Archive | Batch |
| rarsum | N/A |
rarsum | Raffles Cat Helping Contest 2013 | Batch |
| xorb | N/A |
xorb | Dunjudge Archive | Batch |
| soccer | N/A |
Soccer Stadium | IOI 2023 (Day 1) | Interactive |
| losingsleep | N/A |
losingsleep | ARC 119A | Batch |
| toblerone | N/A |
toblerone | HCI Mock NOI 2015 | Batch |
| index | N/A |
index | COCI 2020/2021 Contest 6 | Batch |
| split2 | N/A |
Split | December Course 2018 Elementary Final Contest | Batch |
| koala | N/A |
Koala Game | APIO 2017 | Interactive |
| cardgame2 | N/A |
cardgame2 | Dunjudge Archive | Batch |
| pigeonhole | N/A |
pigeonhole | Dunjudge Archive | Batch |
| flipcards | N/A |
Cards | Ucup Stage 8 M (modified) | Batch |
| factories | N/A |
factories | JOI 2014 Open | Interactive |
| catlunch | N/A |
catlunch | RI/RJC NOI Selection Test 2016 | Batch |
| fliprect | N/A |
fliprect | ARC 081F | Batch |
| umbrella | N/A |
umbrella | USACO Silver Dec 2011 | Batch |
| bodyguard | N/A |
bodyguard | JOISC 2021 | Batch |
| hacker | N/A |
hacker | BOI 2015 | Batch |
| simcity | N/A |
simcity | Dunjudge Archive | Batch |
| razlika | N/A |
razlika | COCI 2013 | Batch |
| erp | N/A |
erp | Dunjudge Archive | Batch |
| colour | N/A |
colour | December Course 2018 Elementary Final Contest | Batch |
| visitingsingapore | N/A |
Visiting Singapore | NOI 2020 Prelims | Batch |
| runway | N/A |
Jianzhi’s Runway Show | RI NOI Selection Test 2017 | Batch |
| passes | N/A |
passes | BOI 2022 | Batch |
| christmasfeast | N/A |
Christmas Feast | Educational Round 2 (errorgorn) | Batch |
| employee | N/A |
employee | Dunjudge Archive | Batch |
| shoes | N/A |
Arranging Shoes | IOI 2019 (Day 1) | Interactive |
| niangao | N/A |
Nian Gao | 2020 CNY (errorgorn) | Batch |
| helloworld | N/A |
Hello World | Classic problem | Batch |
| infiniteseq | N/A |
infiniteseq | AtCoder Regular Contest 071 | Batch |
| levenshtein | N/A |
levenshtein | Classic problem | Batch |
| pandaski | N/A |
pandaski | NOI 2016 | Batch |
| pandasoldiers | N/A |
Soldiers | Dunjudge Archive | Batch |
| guessproblem | N/A |
Guess Problem | peepeepoopoo (Potato3218, ryangohca) | Batch |
| papplesort | N/A |
papplesort | Dunjudge Archive | Batch |
| boardvision | N/A |
Board Vision | RI Novcourse Final Contest 2023 (zixuan, nianhe) | Batch |
| split | N/A |
Split the Attractions | IOI 2019 (Day 1) | Interactive |
| dyingpolynomial | N/A |
Dying Polynomial | RI Nov Sel 2020 (JustAWallaby) | Batch |
| coinbag | N/A |
coinbag | Dunjudge Archive | Batch |
| epicinteractive | N/A |
Epic Interactive | Educational Round 8 (Goodbye oolimry) (errorgorn, oolimry) | Interactive |
| reflection | N/A |
reflection | RI-HCI NOI Selection Test 2020 (eutroph) | Batch |
| lunchbox | N/A |
Lunch Box | NOI 2016 | Batch |
| plantingpotatoes | N/A |
Planting Potatoes | ABC 300F | Batch |
| snakecode | N/A |
snakecode | Dunjudge Archive | Interactive |
| adjmatrix | N/A |
Adjacency Matrix | Dunjudge Archive | Batch |
| pressstart | N/A |
Press Start! | HCI-RI 2020 May Contest (bensonlzl) | Batch |
| modsum | N/A |
modsum | NOI 2012 | Batch |
| sniper | N/A |
sniper | ANDSS Coding Head Sel 2023 Duel (shoryu386) | Batch |
| square_ioi | N/A |
square_ioi | IOI 2014 Practice | Interactive |
| gravity | N/A |
gravity | USACO 2013 US Open, SIlver | Batch |
| stamps | N/A |
stamps | Dunjudge Archive | Batch |
| multiplechoice | N/A |
multiplechoice | USACO 2022 Jan, Platinum | Batch |
| pplow | N/A |
pplow | Classic Problem | Batch |
| burger | N/A |
burger | Code Jam to I/O 2018 for Women | Batch |
| ruler | N/A |
Ruler Of The Zoo | Educational Round 8 (Goodbye oolimry) (oolimry) | Batch |
| fourbuckets | N/A |
Four Buckets | Educational Round 6 (oolimry) | Batch |
| gathering | N/A |
gathering | USACO 2018 December Platinum | Batch |
| matsuri | N/A |
matsuri | AOI 2023 Day 1 (shoryu386) | Batch |
| padoru | N/A |
Hashire Sori Yo! | Dec Course 2020 BAPS (peaceknight05) | Batch |
| trackingtraining | N/A |
Tracking Training | IOI 2020 Practice Session | Batch |
| kanji | N/A |
kanji | Dunjudge Archive | Communication |
| f7 | N/A |
F7 | COCI 2012/2013 | Batch |
| hieroglyphs | N/A |
hieroglyphs | ACM/ICPC World Finals 2011 | Batch |
| circuit | N/A |
Digital Circuit | IOI 2022 (Day 2) | Interactive |
| wabbit | N/A |
wabbit | RI-HCI-NUSH NOI Selection Test 2021 (oolimry) | Batch |
| sealevel | N/A |
sealevel | Dunjudge Archive | Batch |
| sequence | N/A |
sequence | AtCoder | Batch |
| coke | N/A |
Coke | NUSH ISC 2020 (errorgorn) | Batch |
| cakerun | N/A |
Bowen's Cake Run | December Course 2019 Advanced Final Contest (rs) | Batch |
| catfight | N/A |
catfight | Dunjudge Archive | Batch |
| simpletask | N/A |
A Simple Task | Codeforces 558E | Batch |
| midas | N/A |
Midas | POI 2017 Round 3 Day 1 Q1 | Batch |
| shuttlerun | N/A |
shuttlerun | AGC 025C | Batch |
| seabreakpath | N/A |
Seabreak Path | SGP Sparring 2021 (lovemathboy) | Batch |
| lazycat | N/A |
lazycat | Dunjudge Archive | Batch |
| stringsofimpurity | N/A |
stringsofimpurity | AtCoder | Batch |
| straight | N/A |
Pure Straight | ARC 126 | Batch |
| mice | N/A |
mice | Dunjudge Archive | Batch |
| gohcart | N/A |
Goh Cart | Codeforces 1715E (f0restf1re) | Batch |
| synchronization | N/A |
Synchronization | JOI Open Contest 2013 | Batch |
| valley | N/A |
Alpine valley | BOI 2019 Day 1 | Batch |
| dinowalk | N/A |
dinowalk | Classic Problem | Batch |
| simurgh | N/A |
Simurgh | IOI 2017 | Interactive |
| feelgood | N/A |
Feel Good | Luogu P2602 | Batch |
| solonim | N/A |
Solo Nim | Dunjudge Archive | Batch |
| scanner | N/A |
scanner | Dunjudge Archive | Batch |
| lppfnlcst2 | N/A |
Lazy Propogation Persistant Fat Nodes Li Chao Segment Tree 2 | Classic Problem (errorgorn) | Batch |
| numbergame | N/A |
numbergame | ANDSS Welcome 2023 (Day 2) (shoryu386) | Batch |
| dominoes | N/A |
dominoes | Educational Round 9 (maomao90, zaneyu) | Batch |
| bracketscore | N/A |
bracketscore | AGC48 | Batch |
| abbb | N/A |
abbb | Codeforces Raif Round 1 (errorgorn) | Batch |
| hungryrabbits3 | N/A |
Hungry Rabbits 3 | Dec Course 2022 BAPS (bensonlzl) | Batch |
| letters | N/A |
letters | Dunjudge Archive | Batch |
| supertrees | N/A |
Connecting Supertrees | IOI 2020 | Interactive |
| hoofpaperscissor | N/A |
Hoof, Paper, Scissors | USACO 2017 January Contest, Gold | Batch |
| gentlepairs | N/A |
gentlepairs | ABC 187B | Batch |
| lratio | N/A |
L + Ratio | Алгоритм 2022 | Batch |
| basement | N/A |
Basement | Codeforces 1842C | Batch |
| voting | N/A |
Voting | Dunjudge Archive | Batch |
| girlfriends | N/A |
girlfriends (EE) | CP Singles Day Contest 2020 (errorgorn) | Batch |
| streetlamps | N/A |
Street Lamps | APIO 2019 | Batch |
| globalwarming_ceoi | N/A |
Global warming | CEOI 2018 | Batch |
| safety | N/A |
Safety | NOI 2018 | Batch |
| ducktransport | N/A |
ducktransport | ANDSS Coding Head Sel 2023 Duel (bron, shoryu386) | Batch |
| volcanic | N/A |
Volcanic Travel | ANDSS Welcome 2023 (Day 2) (shoryu386) | Batch |
| redblacktree | N/A |
redblacktree | Codeforces 1156D | Batch |
| timeexam | N/A |
What's the Time? | RI November Course Stage 2 Selection Test 2021 (ryangohca) | Batch |
| simplebridges | N/A |
simplebridges | ANDSS February 2023 Contest (shoryu386) | Batch |
| game | N/A |
Game | APIO 2022 | Interactive |
| hole | N/A |
hole | Dunjudge Archive | Batch |
| graphcraft | N/A |
graphcraft | Dunjudge Archive | Interactive |
| streets | N/A |
One-Way Streets | CEOI 2017 | Batch |
| telephone | N/A |
Telephone Game | ANDSS Welcome 2023 (Day 1) (shoryu386) | Batch |
| rainbow | N/A |
Land of the Rainbow Gold | APIO 2017 | Interactive |
| binarycoins | N/A |
binarycoins | Dunjudge Archive | Batch |
| replacedigits | N/A |
Replace Digits | ACL Beginner Contest | Batch |
| mrt | N/A |
MRT | Dunjudge Archive | Batch |
| typicalstairs | N/A |
Typical Stairs | ABC 129 | Batch |
| maximum | N/A |
Maximum | Dunjudge Archive | Batch |
| inequality | N/A |
inequality | RI-HCI NOI Selection Test 2020 (0rang3) | Batch |
| floors | N/A |
floors | Dunjudge Archive | Batch |
| swapsort | N/A |
Swap Sort | HCI December Course Selection 2021 (kai824, pavement) | Batch |
| maximummonogonosity | N/A |
maximummonogonosity | Codeforces 1859E | Batch |
| chocolate | N/A |
chocolate | Dunjudge Archive | Batch |
| boundlessboxes | N/A |
boundlessboxes | Dunjudge Archive | Batch |
| aliens | N/A |
aliens | Dunjudge Archive | Batch |
| network2 | N/A |
network | Dunjudge Archive | Batch |
| closing | N/A |
Closing Time | IOI 2023 (Day 1) | Interactive |
| pandaeyes | N/A |
pandaeyes | Dunjudge Archive | Batch |
| divsum_dec18 | N/A |
Divsum | RI Deccourse 2018 Selection Test (eutroph) | Batch |
| bridges_apio19 | N/A |
Bridges | APIO 2019 | Batch |
| shorten | N/A |
shorten | AGC 001C | Batch |
| alternating | N/A |
alternating | BOI 2018 | Batch |
| minedges | N/A |
Minimizing Edges | USACO 2021 February Contest, Platinum | Batch |
| rank | N/A |
rank | NOI 2008 | Batch |
| roadtrip | N/A |
Road Trip | Classic Problem | Batch |
| airplane | N/A |
Airplane | NOI 2023 Finals (bensonlzl, oolimry) | Batch |
| battleship | N/A |
Battleship | HCI-NUSH NOI Selection 2022 (errorgorn) | Interactive |
| moneychanger | N/A |
moneychanger | Dunjudge Archive | Batch |
| cactus | N/A |
cactus | LOJ #2250 | Batch |
| rainingseason | N/A |
rainingseason | Codeforces 1019E | Batch |
| summarising2020 | N/A |
Summarising 2020 | Hello 2021 (shenxy13) | Interactive |
| alien9 | N/A |
alien9 | IMO Shortlist 1996 | Batch |
| whatisthisactf | N/A |
What is this, a CTF? | April Fools 2023 (tux) | Interactive |
| poi | N/A |
poi | IOI 2009 | Batch |
| pascal | N/A |
pascal | Dunjudge Archive | Batch |
| partitiongame | N/A |
Partition Game | Codeforces 1527E | Batch |
| towers | N/A |
towers | Codeforces 474E | Batch |
| radioactive | N/A |
radioactive | NOI 2015 | Batch |
| horses | N/A |
horses | IOI 2015 | Interactive |
| nis | N/A |
nis | Dunjudge Archive | Batch |
| atm | N/A |
The Great ATM Robbery | APIO 2009 | Batch |
| triangles | N/A |
Counting Triangles | Classic Problem | Batch |
| fractionalmultiset | N/A |
Fractional Multiset | ARC 107 | Batch |
| ufo | N/A |
ufo | Dunjudge Archive | Batch |
| dna_ioi | N/A |
Mutating DNA | IOI 2021 | Interactive |
| deda | N/A |
deda | COCI 2017/2018 | Batch |
| smokeflower | N/A |
smokeflower | Classic Problem | Batch |
| iqtest4 | N/A |
iqtest4 | Valentine's Day Contest 2023 (zixuan) | Batch |
| secret_mco | N/A |
Secret | MCO 2015 | Batch |
| openingshop | N/A |
Opening Shop | Dec Course 2021 BAPS (Halogen) | Batch |
| guessqueue | N/A |
Guess the Queue | Kattis (modified) (ryangohca) | Batch |
| commonsubstring | N/A |
commonsubstring | Dunjudge Archive | Batch |
| woodenraft | N/A |
woodenraft | Codeforces 1223G | Batch |
| infinitezoo | N/A |
Zookeeper and The Infinite Zoo | Codeforces Global Round 13 (errorgorn) | Batch |
| bananaland | N/A |
bananaland | NUSH ISC 2018 | Batch |
| mushroomfarm | N/A |
Jianzhi’s Mushroom Farm | RI NOI Selection Test 2017 | Batch |
| vainish | N/A |
Vanish | 2015-2016 NOI Training Diagnostic Test | Batch |
| kmxorm | N/A |
kmxorm | ASEAN Sparring 2022 (zscoder) | Batch |
| shuffling | N/A |
Shuffling | ARC 065D | Batch |
| bunnyscore | N/A |
bunnyscore | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Interactive |
| rabbitroad | N/A |
RabbitRoad | RI-HCI December Course Selection 2019 (bensonlzl) | Batch |
| laughter | N/A |
laughter | Educational Codeforces Round 27 | Batch |
| hld | N/A |
hld | LOJ P139 | Batch |
| sort | N/A |
sort | Classic Problem? | Batch |
| usefft1 | N/A |
Use FFT 1 | Classic Problem | Batch |
| walk | N/A |
Sky Walking | IOI 2019 | Interactive |
| swap | N/A |
Swapping Cities | APIO 2020 | Interactive |
| ferries | N/A |
ferries | NOI 2013 | Batch |
| nprime | N/A |
Prime | NOI 2008 | Batch |
| cakeatstake | N/A |
Cake at Stake | IOI 2020 Practice Session | Batch |
| robots | N/A |
robots | IOI 2013 | Interactive |
| alphabrackets | N/A |
alphabrackets | Dec Course Final Contest 2017 | Batch |
| planning | N/A |
Company Planning | TOKI Open 2014 | Batch |
| shikandgame | N/A |
shikandgame | AGC 007 | Batch |
| grassplant | N/A |
Grass Planting | Dunjudge Archive | Batch |
| power | N/A |
power | JOI | Batch |
| appletree | N/A |
appletree | Dunjudge Archive | Batch |
| drones | N/A |
Drones | HCI December Course Selection 2021 (cstuart) | Batch |
| shortcut | N/A |
Shortcut | IOI 2016 | Interactive |
| card | N/A |
Card | NOI 2010 | Batch |
| 1402_2 | N/A |
1402_2 | April Fools 2023 (blackscreen1) | Batch |
| pillars | N/A |
Pillars | RI December Course Selection Test 2021 (rs) | Batch |
| phonenumbers | N/A |
phonenumbers | USACO 2022 Feb, Platinum | Batch |
| mate | N/A |
mate | RSA Fun Contest (errorgorn) | Batch |
| badknapsack | N/A |
badknapsack | Educational Round 3 (errorgorn) | Batch |
| inequality2 | N/A |
inequality2 | Dec Course 2021 BAPS (zaneyu) | Batch |
| ohbabyntriples | N/A |
Oh Baby, n Triples! | IOI 2020 Practice Session | Batch |
| trivialmaths2 | N/A |
trivialmaths2 (EE) | Educational Round 7 (errorgorn) | Batch |
| train | N/A |
train | Dunjudge archive | Batch |
| reading | N/A |
Reading Cat | RI November Course Stage 2 Selection Test 2022 (wangy412) | Batch |
| triumvirate | N/A |
Triumvirate | IOI 2020 Practice Session | Batch |
| trespasser | N/A |
ADVANCED Trespasser | 2019 IOI Problem Setter Contest (bensonlzl) | Interactive |
| bracketsyndrome | N/A |
Bracket Syndrome | RI-HCI NOI Selection Test 2019 | Batch |
| paintrectangles | N/A |
paintrectangles | Codeforces 983D | Batch |
| sumzero | N/A |
sumzero | RMI 2020 | Batch |
| buffet | N/A |
buffet | Dunjudge Archive | Batch |
| kthsubstring | N/A |
kthsubstring | ARC 097 | Batch |
| chessislands | N/A |
chessislands | NOI 2010 Selection Test | Batch |
| earthwormlines | N/A |
earthwormlines | LOJ #2303 | Batch |
| deletingnumbers | N/A |
Deleting Numbers | Grand Prix of Urals | Batch |
| removeelements | N/A |
removeelements | Codeforces Round #668 | Batch |
| stations | N/A |
Stations | IOI 2020 (Day 2) | Communication |
| optimalsubseq | N/A |
optimalsubseq | Codeforces 1227D2 | Batch |
| gotoschool_ex | N/A |
gotoschool_ex | RI November Course 2023 Diagnostic Test (NeeNawAmbulance, nianhe) | Batch |
| exponentiate | N/A |
Exponentiate | Classic Problem | Batch |
| manhattancompass | N/A |
manhattancompass | AtCoder | Batch |
| binomial | N/A |
binomial | Dunjudge Archive | Batch |
| collaboration | N/A |
Collaboration | December Course 2019 Advanced Final Contest (0rang3) | Interactive |
| parallelogramfest | N/A |
parallelogramfest | HCI EC³ Beginner Contest (Tyx2019) | Batch |
| prefixgcd | N/A |
prefixgcd | Dec Course 2021 BAPS (jiahng) | Batch |
| orangeroad | N/A |
orangeroad | Educational Round 9 (jamessng, jamielim) | Batch |
| bookshelf | N/A |
bookshelf | Dunjudge Archive | Batch |
| collectmushrooms2 | N/A |
collectmushrooms2 | Dunjudge Archive | Batch |
| ispit | N/A |
ispit | COCI 2018/2019 | Batch |
| celldivision | N/A |
celldivision | Random Idea (shoryu386) | Batch |
| badpotato | N/A |
badpotato | Dunjudge Archive | Batch |
| rabbiteatrabbit | N/A |
rabbiteatrabbit | Dec Trg 2019 (Elementary) (jamielim) | Batch |
| merchant | N/A |
Travelling Merchant | APIO 2017 | Batch |
| 4sum | N/A |
4sum | NOI 2008 | Batch |
| countinghaybales | N/A |
countinghaybales | USACO 2022 Jan, Platinum | Batch |
| cake | N/A |
cake | CEOI 2014 | Batch |
| bracketcoloring | N/A |
bracketcoloring | Codeforces 149D | Batch |
| kthpar | N/A |
JiaHng couldn’t solve this lol | folklore (errorgorn) | Batch |
| datacenters | N/A |
Data Centers | EGOI 2022 Day 2 | Batch |
| roots | N/A |
roots | Codeforces 695E | Batch |
| hipercijevi | N/A |
hipercijevi | COCI 2012/2013 | Batch |
| choochoo | N/A |
Choo Choo | RI-HCI Final Contest 2022 (bensonlzl) | Batch |
| ragingthunder | N/A |
Raging Thunder | Codeforces | Batch |
| devil | N/A |
The Devil's Algorithm | Hello 2022 (errorgorn) | Batch |
| closedpath | N/A |
closedpath | Dunjudge Archive | Batch |
| destroy | N/A |
Destroy | RI-HCI NOI Selection Test 2019 | Batch |
| letterstamper | N/A |
Letter Stamper | Google Code Jam 2010 (modified) | Batch |
| fruits_noi | N/A |
Fruits | NOI 2022 Finals (bensonlzl) | Batch |
| goodmorning | N/A |
Good Morning | ISC 2020 practice (errorgorn) | Batch |
| island | N/A |
Island | NOI 2018 Prelims | Batch |
| latex | N/A |
latex | RI Deccourse 2018 Selection Test | Batch |
| subknapsack | N/A |
Knapsack for All Subsets | Atcoder Beginner Contest 169 | Batch |
| doubleflip | N/A |
Double Flip | TROC 24 (errorgorn) | Batch |
| cousin | N/A |
cousin | Dunjudge Archive | Interactive |
| knapsack | N/A |
Knapsack | NOI 2018 Prelims | Batch |
| weddingcity | N/A |
weddingcity | IOI Sparring 2018 SGP | Batch |
| adjacentswaps | N/A |
Adjacent Swaps | Dunjudge Archive (shenxy13) | Batch |
| gcd | N/A |
Greatest Common Divisor | Classic Problem | Batch |
| cipele | N/A |
cipele | COCI 2018/2019 | Batch |
| fiboregisters | N/A |
IOI Registers: but epic | TROC 24 (errorgorn) | Batch |
| stories | N/A |
Stories Cat | RI November Course Stage 2 Selection Test 2022 (AJR) | Batch |
| goodprogrammer | N/A |
Be a Good Programmer | April Fools 2023 (shoryu386) | Batch |
| conlang | N/A |
conlang | HCI EC³ Beginner Contest (geometric) | Batch |
| wakeup | N/A |
Wake Up | IOI 2020 Practice Session | Batch |
| boarding | N/A |
boarding | NUSH ISC 2018 | Batch |
| flights | N/A |
flights | Dunjudge Archive | Batch |
| taxcollection | N/A |
taxcollection | RI-HCI December Course Selection 2020 (JustAWallaby) | Batch |
| stoningame | N/A |
stoningame | Valentine's Day Contest 2022 (maomao90) | Batch |
| pigeonnests | N/A |
pigeonnests | RSA Fun Contest (shenxy13) | Batch |
| redblue | N/A |
redblue | Dunjudge Archive | Batch |
| kusac | N/A |
kusac | COCI 2013/2014 | Batch |
| notimetodry | N/A |
No Time to Dry | USACO 2021 February Contest, Platinum | Batch |
| archaeologist | N/A |
archaeologist | NOI 2021 Finals | Interactive |
| inspections | N/A |
Inspections | NOI 2023 Finals (bensonlzl) | Batch |
| productcounting | N/A |
Product Counting | Educational Round 5 (errorgorn) | Batch |
| packingducks | N/A |
packingducks | Classic Problem | Batch |
| longesttrip | N/A |
Longest Trip | IOI 2023 (Day 1) | Interactive |
| eating | N/A |
Eating Cat | RI November Course Stage 2 Selection Test 2022 (wangy412) | Batch |
| repairs | N/A |
repairs | Dunjudge Archive | Batch |
| flyingsquirrel | N/A |
Flying Squirrel | Korean IOI Selection Day 1 | Batch |
| judgequeue | N/A |
judgequeue | Dunjudge Archive | Interactive |
| kfc | N/A |
kfc | ANDSS Contest 1 (Syntax) (haydendoo) | Batch |
| bananasmoothie | N/A |
Banana Smoothie | Dunjudge Archive (shenxy13) | Batch |
| dice | N/A |
Dice | Dec Course 2021 BAPS (origami100, dillion) | Batch |
| progressionspells | N/A |
Progression Spells | Codeforces 1661D | Batch |
| colouring | N/A |
colouring | AGC 012B | Batch |
| boxispull | N/A |
Box is Pull | Codeforces Raif Round 1 (bensonlzl) | Batch |
| colorgraph | N/A |
colorgraph | uwu (errorgorn) | Batch |
| fireworks | N/A |
Fireworks | APIO 2016 | Batch |
| dynamicdiameter2 | N/A |
Dynamic Diameter 2 | RMI 2020 | Batch |
| switches2 | N/A |
switches2 | Educational Round 7 (errorgorn) | Batch |
| fun | N/A |
Fun Tour | APIO 2020 | Interactive |
| haiku | N/A |
Iroha and Haiku | AtCoder | Batch |
| abc_apio23 | N/A |
Alice, Bob and Circuit | APIO 2023 | Batch |
| coingame | N/A |
coingame | NTST 2015 | Batch |
| inversions | N/A |
inversions | Dunjudge Archive | Batch |
| hld2 | N/A |
hld2 | LOJ P3532 | Batch |
| kamion | N/A |
kamion | COCI 2010/2011 | Batch |
| palindromicfever | N/A |
Palindromic Fever | ANDSS Welcome 2023 (Day 2) (shoryu386) | Batch |
| foolpruf | N/A |
Foolprüf Security | NERC 2019 | Batch |
| frisbee | N/A |
Frisbee Training | 2019 IOI Problem Setter Contest (0rang3) | Batch |
| judgeantibreaker | N/A |
judgeantibreaker | Educational Round 6 (oolimry) | Batch |
| snail | N/A |
Snail | NOI 2018 Prelims | Batch |
| unitedcows | N/A |
United Cows | USACO 2021 Open, Gold | Batch |
| lfs | N/A |
Longest Factor Subsequence | Educational Round 5 (errorgorn) | Batch |
| ninjaseasy | N/A |
Ninjas (Easy) | TROC 24 (oolimry) | Batch |
| naturalpark | N/A |
naturalpark | JOISC 2017 | Interactive |
| transform | N/A |
transform | Dunjudge Archive | Batch |
| indivisibility | N/A |
indivisibility | Dunjudge Archive | Batch |
| copyandpaste | N/A |
Copy And Paste | Codeforces 1688F | Batch |
| timeleap | N/A |
timeleap | JOI | Batch |
| pokeadd | N/A |
pokeadd | Dunjudge Archive | Batch |
| nemo | N/A |
nemo | Dunjudge Archive | Batch |
| rabbitmilk | N/A |
rabbitmilk | Dunjudge Archive | Batch |
| coolinteractive | N/A |
Cool Interactive | Educational Round 8 (Goodbye oolimry) (errorgorn) | Interactive |
| ponteng | N/A |
Ponteng | 2019 IOI Problem Setter Contest | Batch |
| game_ioi13 | N/A |
game | IOI 2013 | Interactive |
| perfectprimes | N/A |
perfectprimes | Anderson Fluff Contest (Josh28, shoryu386) | Batch |
| trivialexam_ex_ex | N/A |
trivialexam_ex_ex | April Fools 2023 (oolimry, elainagrey, Xiaoyang) | Batch |
| peddler | N/A |
Peddler | ABC 188 | Batch |
| joker | N/A |
joker | BOI 2020 | Batch |
| marathon | N/A |
marathon | RI Problem Setter Contest 2019 (Ziwyy) | Batch |
| obstacles | N/A |
obstacles | Codeforces 360B | Batch |
| mamamintaplusa | N/A |
mama MINta PLUSa | Educational Round 8 (Goodbye oolimry) (errorgorn) | Batch |
| jedan | N/A |
jedan | COCI 2012/2013 | Batch |
| cp2booksales | N/A |
cp2booksales | Dunjudge Archive | Batch |
| hop | N/A |
hop | COCI 2020/2021 Contest #4 Problem 3 | Batch |
| usefft3 | N/A |
Use FFT 3 | Valentine's Day Contest 2022 (errorgorn) | Batch |
| ljubomora | N/A |
ljubomora | COCI 2012/2013 | Batch |
| orchard2 | N/A |
orchard2 | RI NOI Selection Test 2015 | Batch |
| election | N/A |
election | Dunjudge Archive | Batch |
| toll | N/A |
toll | BOI 2017 | Batch |
| evolution | N/A |
Evolution | Korean IOI Selection Day 1 | Batch |
| snack | N/A |
snack | Dunjudge Archive | Batch |
| pokenumbers | N/A |
pokenumbers | Dunjudge Archive | Batch |
| arrangement | N/A |
arrangement | LOJ #3327 | Batch |
| idigit | N/A |
I Dig It! | IOI 2020 Practice Session | Batch |
| molecules | N/A |
Detecting Molecules | IOI 2016 | Interactive |
| clocktower | N/A |
Clock Tower | RI December Course Selection Test 2021 (Deadeye) | Batch |
| robotcontest | N/A |
Robot Contest | IOI 2023 (Day 2) | Interactive |
| eatcake | N/A |
Eating Cake | Educational Codeforces Round 94 | Batch |
| wandering | N/A |
wandering | AGC 029 | Batch |
| mountain | N/A |
Mountain | IOI 2005 | Batch |
| personalspace | N/A |
personalspace | December Course 2018 Elementary Final Contest | Batch |
| guards_ex | N/A |
Guards (Extreme) | Zane (zaneyu, ryangohca) | Batch |
| rainbowroad | N/A |
Rainbow Road | HCI-RI 2020 May Contest (bensonlzl) | Batch |
| race | N/A |
Race | IOI 2011 | Interactive |
| binaryseq | N/A |
BinarySeq | Dunjudge Archive (bensonlzl) | Batch |
| badtree | N/A |
badtree | RI-HCI December Course Selection 2019 (bensonlzl) | Batch |
| fibotree | N/A |
fibotree | Bubble Cup 14 (modified) | Batch |
| forensic | N/A |
forensic | NOI 2012 | Batch |
| efficientdelivery | N/A |
efficientdelivery | UWCOI 2021 | Batch |
| eevacuation | N/A |
Elementary Evacuation | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch |
| trivialexam | N/A |
小菜一碟 | April Fools 2023 (Xiaoyang) | Batch |
| centroid | N/A |
Centroid | Dunjudge Archive | Batch |
| eescapism | N/A |
Elementary Escapism | Dec Course 2021 Elementary Final Contest (shenxy13) | Batch |
| Unbalanced | N/A |
unbalanced | ABC 043D | Batch |
| restaurant | N/A |
restaurant | Dunjudge Archive | Batch |
| robobear | N/A |
The Maze of RoboBear | Tuymaada 2021 | Batch |
| paint_coi | N/A |
paint_coi | COI 2020 | Batch |
| yabbitmeetup | N/A |
yabbitmeetup | HCI NOI Selection Retest 2020 (bensonlzl) | Batch |
| GSS | N/A |
GSS | Dunjudge Archive | Batch |
| pipes | N/A |
Pipes | CEOI 2015 | Batch |
| invasion | N/A |
invasion | Dunjudge Archive | Batch |
| numericalstrings | N/A |
numericalstrings | RI November Course Stage 2 Selection Test 2019 | Batch |
| buygifts | N/A |
buygifts | Codeforces 1619D | Batch |
| gift | N/A |
gift | NOI 2007 | Batch |
| fractions | N/A |
fractions | Classic Problem (YeoBL20) | Batch |
| gizmoguy | N/A |
Gizmo Guy | IOI 2020 Practice Session | Batch |
| interestring | N/A |
interestring | RI-HCI December Course Selection 2020 (cstuart) | Batch |
| cyberland_apio23 | N/A |
Cyberland | APIO 2023 | Interactive |
| conversations | N/A |
Zookeeper's Conversations | Singapore Zoo (shenxy13) | Batch |
| typo | N/A |
Typo | ABC221 | Batch |
| cny | N/A |
cny | ANDSS Contest 2 (Greedy and Bruteforce) (LCJLY) | Batch |
| cloudcomputing | N/A |
Cloud computing | CEOI 2018 | Batch |
| bucketstacking | N/A |
Bucket Stacking | RI-HCI-NUSH NOI Selection Test 2021 (oolimry) | Batch |
| perishableroads | N/A |
perishableroads | Codeforces 773D | Batch |
| bracketflip | N/A |
bracketflip | Dec Course 2020 BAPS (pavement) | Batch |
| plagia | N/A |
plagia | December Course 2018 Advanced Final Contest | Batch |
| corporate | N/A |
Corporate | IOI 2020 Practice Session | Batch |
| sandcity | N/A |
sandcity | Random Idea (shoryu386, Reverberate) | Batch |
| 1402 | N/A |
1402 | April Fools' 2021 (bensonlzl) | Batch |
| hunter | N/A |
Hunter | Dunjudge Archive (bensonlzl) | Interactive |
| candycrush | N/A |
Candy Crush | Dunjudge Archive | Batch |
| cardtrick | N/A |
Card Trick | Classic Problem (oolimry) | Batch |
| closedrooms | N/A |
closedrooms | AtCoder Grand Contest 014 | Batch |
| prison | N/A |
Prisoner Challenge | IOI 2022 (Day 1) | Interactive |
| spotlights | N/A |
Estelle’s Concert Spotlights | RI-HCI NOI Selection Test 2018 | Batch |
| perm | N/A |
Permutation | APIO 2022 | Interactive |
| quality | N/A |
Quality of Living | IOI 2010 | Interactive |
| sortedandsorted | N/A |
sortedandsorted | ARC 097 | Batch |
| trekking | N/A |
Jungle Trekking | HCI NOI Selection Test 2017 | Batch |
| wearenumberone | N/A |
We Are Number One | IOI 2020 Practice Session | Batch |
| fractional_knapsack | N/A |
fractional_knapsack | Classic Problem | Batch |
| love | N/A |
What is love? | Luogu P8280 | Batch |
| uniquepath | N/A |
uniquepath | AGC38D | Batch |
| goombatower | N/A |
Goomba Tower | Timus 1439 | Batch |
| penguinfood | N/A |
penguinfood | Dunjudge Archive | Batch |
| squidgame | N/A |
Squid Game 2: Hot Chocolate | Valentine's Day Contest 2023 (Wenkai, beepbeepsheep) | Batch |
| unluckyfloors | N/A |
unluckyfloors | NOI 2016 | Batch |
| train_ex | N/A |
train_ex | Dunjudge Archive | Batch |
| escapesadland | N/A |
Escape Sadland | Dunjudge Archive | Batch |
| meetings | N/A |
Meetings | IOI 2018 | Interactive |
| stagegames_part2 | N/A |
Estelle’s Stage Games (Subtasks 6 - 10) | RI-HCI NOI Selection Test 2018 | Interactive |
| expressways | N/A |
expressways | Dunjudge Archive | Batch |
| cantor | N/A |
cantor | TROC 24 (errorgorn) | Interactive |
| weddingcoins | N/A |
weddingcoins | Dunjudge Archive | Batch |
| garden_ioi08 | N/A |
Linear Garden | IOI 2008 | Batch |
| zhylanio | N/A |
zhylanio | IZHO 2022 | Batch |
| wabot2 | N/A |
wabot2 | ASEAN Sparring 2022 (bensonlzl) | Batch |
| pigeons | N/A |
pigeons | Classic Problem | Batch |
| jumpontree | N/A |
jumpontree | yosupo's judge | Batch |
| infiniteloop | N/A |
Infinite Looping Sequence | 2017 RI Dec Course Sel (pwypeanut) | Batch |
| workload | N/A |
December Training Workload | Classic Problem | Batch |
| graphoverflow | N/A |
graphoverflow | RI Deccourse 2018 Selection Test (jerryhanjt) | Batch |
| nicenumber | N/A |
nicenumber | Anderson Fluff Contest (haydendoo) | Batch |
| clipboard | N/A |
Jianzhi’s Clipboard Sorting | RI NOI Selection Test 2017 | Batch |
| woodcutter | N/A |
Woodcutter | Codeforces 527C (modified) | Interactive |
| votingcities | N/A |
Voting Cities | NOI 2022 Finals | Batch |
| garden_ioi05 | N/A |
Garden | IOI 2005 | Batch |
| foreveralone | N/A |
foreveralone | Dunjudge Archive | Batch |
| minimum | N/A |
minimum | Classic Problem | Interactive |
| wormholes | N/A |
wormholes | Dunjudge Archive | Batch |
| polyomino | N/A |
polyomino | ABC 322D | Batch |
| entropy | N/A |
entropy | RI-HCI December Course Selection 2020 (0rang3) | Batch |
| assembly | N/A |
assembly | Dunjudge Archive | Batch |
| catleap | N/A |
catleap | Dunjudge Archive | Batch |
| inequality3 | N/A |
Social Inequality | TOKI Open 2014 | Batch |
| cuberoot | N/A |
cuberoot | Classic Problem | Batch |
| gap | N/A |
Gap | APIO 2016 | Interactive |
| penguingathering | N/A |
penguingathering | ABC 156C | Batch |
| lctocd | N/A |
LCT OCD | Atcoder Nikkei Finals 2019 | Batch |
| crab | N/A |
Crab | NUSH NOI Selection Test 2018 | Batch |
| equals | N/A |
equals | ARC 097 | Batch |
| 3nplus1II | N/A |
3nplus1II | Classic Problem | Batch |
| graph | N/A |
graph | Dunjudge Archive | Batch |
| wavynumbers | N/A |
wavynumbers | Codeforces 273E | Batch |
| magicboard | N/A |
magicboard | AOI 2023 Day 2 (shoryu386) | Batch |
| towers_ioi | N/A |
Radio Towers | IOI 2022 (Day 1) | Interactive |
| swimming | N/A |
Constructing a Swimming Pool | RI-HCI-NUSH NOI Selection Test 2021 (0rang3) | Batch |
| singleflip | N/A |
Single Flip | TROC 24 (maomao90) | Batch |
| beacon | N/A |
Beacon Towers | Grand Prix of Seoul | Batch |
| beechtree | N/A |
Beech Tree | IOI 2023 (Day 2) | Interactive |
| makemst | N/A |
makemst | Codeforces 1088F | Batch |
| psle | N/A |
Old PSLE Grading System | Classic Problem | Batch |
| routers | N/A |
routers | Dunjudge Archive | Batch |
| goodseq | N/A |
goodseq | Dunjudge Archive | Batch |
| tour | N/A |
tour | NOI 2011 | Batch |
| workload2 | N/A |
Workload 2 | Dec Course 2021 Intermediate Contest 4 (Data Structures III) (errorgorn) | Batch |
| addone | N/A |
Add One | Codeforces 1513C | Batch |
| domine | N/A |
domine | COCI 2013/2014 | Batch |
| minerals | N/A |
minerals | JOISC 2019 | Interactive |
| legowall | N/A |
Lego Wall | EGOI 2022 Day 1 | Batch |
| vision | N/A |
Vision Program | IOI 2019 | Interactive |
| sandd | N/A |
sandd | Classic Problem | Interactive |
| thief | N/A |
thief | Dunjudge Archive | Batch |
| dahliahostels | N/A |
dahliahostels | Valentines Contest 2021 (errorgorn) | Batch |
| insects | N/A |
Rarest Insects | IOI 2022 (Day 2) | Interactive |
| colourwalk | N/A |
Colour Walk | RI-HCI Final Contest 2022 | Batch |
| levelingup | N/A |
Leveling Up | RI November Course Stage 2 Selection Test 2021 (ryangohca) | Batch |
| skillmoves | N/A |
skillmoves | RI November Course Stage 2 Selection Test 2019 | Batch |
| construction | N/A |
Construction of Highway | JOI 2017/2018 Spring Camp | Batch |
| surnames | N/A |
Surnames | 2020 CNY (errorgorn) | Batch |
| artswap | N/A |
artswap | HCI NOI Selection Retest 2020 (bensonlzl) | Interactive |
| nou | N/A |
no "u" | December Course 2018 Elementary Final Contest (bensonlzl) | Batch |
| addition2 | N/A |
Addition? | Hello 2022 (oolimry) | Batch |
| gugdance | N/A |
gugdance | Dunjudge Archive | Batch |
| countingagain | N/A |
Counting Again | ARC 104D | Batch |
| morefun | N/A |
Even more fun | CPSPC 2010 | Batch |
| lampice | N/A |
lampice | COCI 2019/2020 | Batch |
| semafor | N/A |
semafor | COI 2020 | Batch |
| medianstring | N/A |
medianstring | Dunjudge Archive | Batch |
| lis | N/A |
Longest Increasing Subsequence | Classic problem | Batch |
| luarulers | N/A |
Lua Rulers | Codeforces 1748C | Batch |
| 4russians | N/A |
4russians | RI-HCI NOI Selection Test 2020 (jamielim) | Batch |
| semiconnected | N/A |
semiconnected | Dunjudge Archive | Batch |
| rbpoints | N/A |
rbpoints | ABC 091C | Batch |
| mrbeancurd | N/A |
mrbeancurd | HCI Be A Problem Setter (BAPS) Contest 2017 (jzh, caffeine) | Batch |
| candies_ioi | N/A |
Distributing Candies | IOI 2021 | Interactive |
| wheelofmisfortune | N/A |
Wheel of Misfortune | IOI 2020 Practice Session | Batch |
| subwaytrip | N/A |
subwaytrip | Dunjudge Archive | Batch |
| christmaswall | N/A |
Christmas Wall | Educational Round 2 (maomao90) | Batch |
| removeedges | N/A |
removeedges | Atcoder | Batch |
| coins | N/A |
Coins | IOI 2017 Practice | Communication |
| supperbox | N/A |
Estelle’s Supper Box | RI-HCI NOI Selection Test 2018 | Batch |
| roadsideadverts | N/A |
roadsideadverts | NOI 2017 | Batch |
| twoavenues | N/A |
twoavenues | Codeforces 1648F | Batch |
| visiting | N/A |
visiting | Dunjudge Archive | Batch |
| exoticplants | N/A |
Exotic Plants | Luogu P4568 [JLOI2011] | Batch |
| selectingintervals | N/A |
selectingintervals | Codeforces 1055E | Batch |
| picnic | N/A |
Picnic | Codeforces Global Round 17 | Batch |
| nutritionist | N/A |
nutritionist | Dunjudge Archive | Batch |
| leftright | N/A |
Left and Right | Dec Trg 2019 (Elementary) (oolimry) | Batch |
| feedthewallabies | N/A |
Feed the Wallabies | RI December Course Selection Test 2021 (syy) | Batch |
| bracketcount | N/A |
bracketcount | Valentines Contest 2021 (errorgorn) | Batch |
| goneviral | N/A |
Gone Viral | IOI 2020 Practice Session | Batch |
| towerdefense | N/A |
towerdefense | Dunjudge Archive | Batch |
| flybot | N/A |
flybot | Dunjudge Archive | Batch |
| duels | N/A |
duels | Educational Round 9 (maomao90, jamessng) | Batch |
| snakesnack2 | N/A |
snakesnack2 | RI-HCI-NUSH NOI Selection Test 2021 (errorgorn) | Batch |
| nom | N/A |
nom | RMI 2021 | Batch |
| rootedlca | N/A |
Rooted LCA | folklore (errorgorn) | Batch |
| obelisk | N/A |
obelisk | NOI 2014 | Batch |
| fireandbeary | N/A |
fireandbeary | Dunjudge Archive (jamielim) | Batch |
| excombo | N/A |
EX Combo | RSA Fun Contest (oolimry) | Batch |
| dreaming | N/A |
dreaming | IOI 2013 | Interactive |
| adjlist | N/A |
Adjacency List | Dunjudge Archive | Batch |
| examinations | N/A |
examinations | JOI | Batch |
| minimax | N/A |
minimax | Hello 2020 (errorgorn) | Batch |
| colourblind | N/A |
colourblind | HCI NOI Selection Retest 2020 (bensonlzl) | Interactive |
| alice | N/A |
Alice | IMO Shortlist 2019 | Interactive |
| friend | N/A |
friend | IOI 2014 | Interactive |
| blocks | N/A |
Blocks | UWCOI 2020 (socho, astoria, kimbj0709) | Interactive |
| secret | N/A |
Secret | JOI Open 2014 | Interactive |
| llis | N/A |
Longest LIS | NUSH NOI Selection Test 2018 | Batch |
| republiccity | N/A |
Republic City | RI Nov Sel 2020 (JustAWallaby) | Batch |
| area_noi | N/A |
area_noi | NOI 2023 Qualification Contest (yanhao) | Batch |
| pizzeria | N/A |
Pizzeria Queries | CSES | Batch |
| blanko | N/A |
blanko | Dunjudge Archive | Batch |
| mergecards | N/A |
Merge Cards | Google Kick Start 2020 Round G | Batch |
| cantor_ex | N/A |
cantor_ex | Valentine's Day Contest 2022 (errorgorn) | Interactive |
| inversionsum | N/A |
inversionsum | Dunjudge Archive | Batch |
| threetowers | N/A |
threetowers | POI 2015 Round 2 Day 2 Q2 | Batch |
| deque | N/A |
Deque | AtCoder Educational DP Contest | Batch |
| experimentexplodeexpel | N/A |
Experiment. Explode. Expel. | Dunjudge Archive | Batch |
| highway | N/A |
Highway Tolls | IOI 2018 | Interactive |
| relutree | N/A |
relutree | Classic Problem (errorgorn) | Batch |
| seedflare | N/A |
Seed Flare | SGP Sparring 2021 (lovemathboy) | Interactive |
| pushups | N/A |
pushups | Dunjudge Archive | Batch |
| postcard | N/A |
postcard | Codeforces 4D | Batch |
| keys | N/A |
Keys | IOI 2021 | Interactive |
| lppfnlcst | N/A |
Lazy Propagation Persistant Fat Nodes Li Chao Segment Tree | Educational Round 1 (errorgorn) | Batch |
| globalwarming | N/A |
Global Warming | NOI 2013 | Batch |
| inheritance | N/A |
inheritance | JOI 2014/2015 | Batch |
| magicspell | N/A |
magicspell | AOI 2023 Day 2 (shoryu386) | Batch |
| motest | N/A |
MOtest | Valentine's Day Contest 2023 (Tyx2019) | Batch |
| selfpermutation | N/A |
selfpermutation | TOKI KSN Day 2 | Batch |
| bananafarm | N/A |
bananafarm | NOI 2015 | Batch |
| parks | N/A |
Fountain Parks | IOI 2021 | Interactive |
| cats | N/A |
cats | NOI 2014 | Batch |
| troubles | N/A |
troubles | Dunjudge Archive | Batch |
| treepruning2 | N/A |
Pruning Trees | Codeforces 1593E (modified) (ecxx) | Batch |
| catalansum | N/A |
catalansum (EE) | Educational Round 3 (errorgorn, oolimry) | Batch |
| passwords | N/A |
passwords | Dunjudge Archive | Batch |
| globalwarming_ex | N/A |
globalwarming_ex | Dunjudge Archive | Batch |
| potatoqueue | N/A |
potatoqueue | Dunjudge Archive | Interactive |
| waterslide | N/A |
Water Slide | ROI 2022 | Batch |
| malcolm | N/A |
malcolm | COCI 2012/2013 | Batch |
| clockpalindrome | N/A |
clockpalindrome | December Course 2019 Advanced Final Contest | Batch |
| camels | N/A |
Guessing Camels | NWERC 2015 | Batch |
| naan | N/A |
naan | JOI 2018/2019 Spring Camp | Batch |
| treepruning | N/A |
Tree Pruning | Codeforces 1593E | Batch |
| construct | N/A |
Constructing Birthday Presents | RI-HCI-NUSH NOI Selection Test 2021 (0rang3) | Batch |
| staircase | N/A |
Staircase | ABC 148D | Batch |
| jams | N/A |
Jams | Algorithm Class Mini-Contest 8 | Batch |
| gwynethandtree | N/A |
Gwyneth and Tree | Codeforces 342E | Batch |
| helloworld2 | N/A |
Hello World? | Hello 2022 (jamessng) | Batch |
| morepaths | N/A |
morepaths | Dunjudge Archive | Batch |
| candies2 | N/A |
candies2 | ARC 064A | Batch |
| servers | N/A |
Inside information | BOI 2021 | Batch |
| hashcollision | N/A |
Hash Collision | Hello 2021 (shenxy13) | Interactive |
| ples | N/A |
ples | COCI 2011/2012 | Batch |
| sailor | N/A |
sailor | CPSPC 2010 | Batch |
| powerpoints | N/A |
Power Points | IOI 2020 Practice Session | Batch |
| variety | N/A |
variety | RI November Course Stage 2 Selection Test 2019 | Batch |
| rolling | N/A |
Rolling | Dunjudge Archive | Batch |
| holdinghands | N/A |
holdinghands | Dec Course 2020 BAPS (jiahng) | Batch |
| streakmanipulation | N/A |
streakmanipulation | The 2nd Universal Cup. Stage 12: Hefei | Batch |
| firing | N/A |
Firing | IOI 2020 Practice Session | Batch |
| airline | N/A |
airline | JOISC 2018, Day 3 | Communication |
| galaxycollapse | N/A |
galaxycollapse | AOI 2023 Day 2 (shoryu386) | Batch |
| sonya | N/A |
Sonya and Problem Wihtout A Legend | Codeforces 713C | Batch |
| bestplace | N/A |
bestplace | NOI 2017 | Batch |