A collection of solutions since 2016, when I was a 2nd-year CS student in college. This could explain some weird solutions you might find lol 😛
Number of solved problems in this repo: 801
| Problem | Difficulty | Tags | Solution |
|---|---|---|---|
| whichisgreater | easy (800) | implementation | C |
| betting | easy (900) | math | C |
| oddgnome | easy (900) | implementation | C |
| breakingbranches | easy (1100) | math | C |
| cinema2 | easy (1100) | implementation | C |
| socialdistancing2 | easy (1100) | math | C |
| jointjogjam | easy (1150) | geometry, math | C |
| locustlocus | easy (1150) | math | C |
| 99problems | medium (1200) | implementation | C |
| jazzitup | medium (1200) | brute force, math | C |
| throwns | medium (1200) | implementation, stack | C |
| babelfish | medium (1300) | data structure | C (2), C , Ruby |
| brokencalculator | medium (1300) | implementation | C |
| conteststruggles | medium (1300) | math | C |
| driversdilemma | medium (1300) | brute force, implementation, math | C |
| election2 | medium (1300) | hash map | C |
| electionparadox | medium (1300) | greedy | C |
| namegeneration | medium (1300) | constructive algorithm | C |
| outofsorts | medium (1300) | implementation | C |
| howmanydigits | medium (1350) | math, number theory | C (2), C , Python |
| musicaltrees | medium (1350) | implementation | C |
| spellingbee | medium (1350) | implementation | C |
| barclassification | medium (1400) | brute force | C |
| busnumbers | medium (1400) | implementation | C |
| doctorkattis | medium (1400) | data structure | C |
| fieldtrip | medium (1400) | implementation | C |
| fishmongers | medium (1400) | greedy | C |
| fluortanten | medium (1400) | prefix sum | C (2), C |
| generalizedrecursivefunctions | medium (1400) | dp, input format | Python |
| hopscotch50 | medium (1400) | grid, shortest path | C |
| mrcodeformatgrader | medium (1400) | implementation | C |
| pawnshop | medium (1400) | data structure, greedy | C |
| quickscope | medium (1400) | hash map, stack | C |
| raidteams | medium (1400) | implementation, sorting | C |
| shoppinglist | medium (1400) | data structure, hash set, set | C |
| skolavslutningen | medium (1400) | graph, union find | C |
| socialrunning | medium (1400) | implementation | C |
| threedigits | medium (1400) | dp | C |
| loworderzeros | medium (1450) | math, number theory | C (2), C |
| memorymatch | medium (1450) | case work, data structure | C |
| annoyedcoworkers | medium (1500) | greedy | C |
| arraysmoothening | medium (1500) | greedy, heap, priority queue | C |
| battleship | medium (1500) | implementation, simulation | C |
| beastbullies | medium (1500) | greedy | C |
| caveexploration2 | medium (1500) | grid, shortest path | C |
| cheatingbooleantree | medium (1500) | dp, graph, tree | C |
| clinic | medium (1500) | data structure, implementation | C |
| colorland | medium (1500) | dp, graph | C |
| congaline | medium (1500) | linked list | C |
| cowboycheckers | medium (1500) | implementation | C |
| escapewallmaria | medium (1500) | bfs, grid, shortest path | C |
| findmyfamily | medium (1500) | binary search, moving window | C |
| foosball | medium (1500) | implementation | C |
| frustratedqueue | medium (1500) | dp | C |
| grazedgrains | medium (1500) | geometry | C |
| historicexhibition | medium (1500) | data structure, greedy, map | C |
| hotsprings | medium (1500) | greedy, sorting | C |
| intervalscheduling | medium (1500) | greedy, sorting | C |
| luckynumber | medium (1500) | math | Python |
| olympusmans | medium (1500) | binary search, geometry | Python |
| platformplacing | medium (1500) | greedy | C |
| promotions | medium (1500) | bfs, dfs, graph | C |
| reconstructingtapeart | medium (1500) | data structure, greedy | C |
| rsamistake | medium (1500) | math, number theory | C |
| slidecount | medium (1500) | implementation, prefix sum, sliding window | C |
| spideydistance | medium (1500) | counting | Python |
| terraces | medium (1500) | bfs, dfs, flood fill, graph | C (2), C |
| ticketcompleted | medium (1500) | graph, probability | C |
| tictacstate | medium (1500) | bit mask, implementation | C |
| wordlewithfriends | medium (1550) | case work, implementation | C |
| appealtotheaudience | hard (1600) | dfs, greedy, tree | C |
| canvas | hard (1600) | data structure, greedy | C |
| dragonballs | hard (1600) | binary search, grid, interactive | C , Python |
| draughts | hard (1600) | backtracking, brute force, dfs, graph | C |
| enumeratingbrackets | hard (1600) | dp | C |
| keyboardconcert | hard (1600) | bit mask, data structure, dp | C (2), C |
| martiandna | hard (1600) | binary search, moving windows | C |
| meltdown | hard (1600) | binary search, geometry | C |
| oddaevenb | hard (1600) | combinatorics, dp | C |
| orchard | hard (1600) | dp, math, probability | C |
| robotturtles | hard (1600) | grid, shortest path | C |
| rockclimbing | hard (1600) | grid, negative weights, shortest path | C |
| spehrling | hard (1600) | dp | C |
| abinitio | hard (1700) | data structure, graph | C (2), C |
| antennaanalysis | hard (1700) | case work, dp, moving window | C |
| deceptivedirections | hard (1700) | bfs, dfs, dp, grid, shortest path | C |
| endgame | hard (1700) | grid, math, random | C |
| forestfruits | hard (1700) | graph, greedy, shortest path | C |
| jackthelumberjack | hard (1700) | prefix sum | C |
| movienight | hard (1700) | counting, cycle, graph | C |
| randomdigitalexponentiation | hard (1700) | dfs, math | C |
| studentsko | hard (1700) | LIS, dp | C |
| wordpuzzle | hard (1700) | dp | C |
| dartscoring | hard (1750) | convex hull, geometry | C |
| ntnuorienteering | hard (1750) | all pair shortest path, graph | C |
| babynames | hard (1800) | data structure, dfs, trie | C |
| blackandwhite | hard (1800) | bitmask, dp, math, probabilities | C |
| dvaput | hard (1800) | string, string hashing, strings, suffix array | C (2), C |
| hopscotch500 | hard (1800) | dp, grid, shortest path | C |
| perfectskyline | hard (1800) | bit mask, dp | C |
| roomevacuation | hard (1800) | graph, max flow | C |
| shortestpath4 | hard (1800) | dp, graph, shortest path | C |
| efficientbusrouting | hard (1900) | graph, greedy, tree | C |
| flightcollision | hard (1900) | data structure, priority queue, rational number, segment tree | C |
| powersof2 | hard (1900) | bitmask, combinatorics, inclusion-exclusion | C |
| traderoutes | hard (1900) | graph, greedy | C |
| sabor | hard (1950) | constructive algorithms, simulation | C |
| yatp | hard (2100) | binary search, centroid decomposition, graph, slope trick | C |
| 3sideddice | unknown | C | |
| a1paper | unknown | C | |
| ada | unknown | Python | |
| addemup | unknown | C | |
| addtwonumbers | unknown | C | |
| adjoin | unknown | C | |
| administrativeproblems | unknown | C | |
| adventuremoving4 | unknown | C | |
| airconditioned | unknown | C | |
| alexandbarb | unknown | C | |
| alicedigital | unknown | C | |
| allpairspath | unknown | C | |
| almostperfect | unknown | C | |
| almostunionfind | unknown | C | |
| alphabet | unknown | C | |
| alphabetanimals | unknown | C | |
| amanda | unknown | C | |
| amazing | unknown | C | |
| amoebas | unknown | Ruby | |
| amsterdamdistance | unknown | Python | |
| amultiplicationgame | unknown | C | |
| anagramcounting | unknown | Python | |
| anttyping | unknown | C | |
| apaxianparent | unknown | Ruby | |
| apples | unknown | C | |
| applesack | unknown | C | |
| aprizenoonecanwin | unknown | C (2), C | |
| arbitrage | unknown | C | |
| arcticnetwork | unknown | C | |
| areyoulistening | unknown | C | |
| arithmetic | unknown | C | |
| arrayofdiscord | unknown | C | |
| artichoke | unknown | Python | |
| asciifigurerotation | unknown | C | |
| assembly | unknown | C | |
| astrologicalsign | unknown | C | |
| autori | unknown | Ruby | |
| averagespeed | unknown | C | |
| avion | unknown | Ruby | |
| avoidingtheapocalypse | unknown | C | |
| avoidland | unknown | C | |
| awkwardparty | unknown | C | |
| azulejos | unknown | C | |
| baas | unknown | C | |
| babybites | unknown | C | |
| badpacking | unknown | C , Ruby | |
| balanceddiet | unknown | C , Python | |
| baloni | unknown | C | |
| base2palindrome | unknown | C | |
| basicprogramming1 | unknown | C , Python | |
| basicprogramming2 | unknown | C | |
| basicremains | unknown | Python | |
| batmanacci | unknown | C | |
| beautifulprimes | unknown | C | |
| beehouseperimeter | unknown | C | |
| beeproblem | unknown | C | |
| bestbefore | unknown | C | |
| bestrelayteam | unknown | Ruby | |
| bigtruck | unknown | C | |
| bikegears | unknown | Ruby | |
| bing | unknown | C | |
| bingoties | unknown | C | |
| birds | unknown | C | |
| birthday | unknown | C | |
| bitbybit | unknown | C | |
| bitsequalizer | unknown | C | |
| blockcrusher | unknown | C | |
| blockgame2 | unknown | C | |
| blowingcandles | unknown | C | |
| boatparts | unknown | C | |
| bobby | unknown | C | |
| boggle | unknown | C | |
| bokforing | unknown | C | |
| bookclub | unknown | C | |
| bookingaroom | unknown | Ruby | |
| bowserspipes | unknown | C | |
| boxes | unknown | C | |
| bracketpairing | unknown | C | |
| brackets | unknown | C | |
| bread | unknown | C | |
| breakingbad | unknown | C | |
| brexit | unknown | C | |
| brokenswords | unknown | C | |
| browniepoints | unknown | C | |
| bst | unknown | C (2), C | |
| builddeps | unknown | C | |
| buka | unknown | Python | |
| bumped | unknown | C | |
| bungeebuilder | unknown | C | |
| buttonbashing | unknown | C | |
| caching | unknown | C | |
| calculator | unknown | Python | |
| camels | unknown | C (2), C | |
| candydivision | unknown | C | |
| canofworms | unknown | C | |
| canonical | unknown | C | |
| cantinaofbabel | unknown | C | |
| cantor | unknown | C | |
| cardhand | unknown | C | |
| cardmagic | unknown | C | |
| cardtrading | unknown | C | |
| cargame | unknown | C | |
| carpet | unknown | C | |
| catalan | unknown | Python | |
| catalansquare | unknown | Python | |
| cats | unknown | C | |
| caveexploration | unknown | C | |
| centsavings | unknown | C | |
| ceremony | unknown | C | |
| chanukah | unknown | Ruby | |
| charlesincharge | unknown | C | |
| checkingforcorrectness | unknown | C | |
| chewbacca | unknown | C | |
| chopwood | unknown | C | |
| circuitmath | unknown | C | |
| citrusintern | unknown | C | |
| classpicture | unknown | C | |
| classy | unknown | C (2), C | |
| cleaningpipes | unknown | C | |
| climbingworm | unknown | C | |
| clockconstruction | unknown | C | |
| clockpictures | unknown | C | |
| coast | unknown | C | |
| cocoacoalition | unknown | C | |
| coconut | unknown | C | |
| codecleanups | unknown | C | |
| coffeedate | unknown | C | |
| coinstacks | unknown | C | |
| coke | unknown | C | |
| collatz | unknown | C | |
| color | unknown | C | |
| coloring | unknown | C | |
| communicationssatellite | unknown | C , Ruby | |
| competitivearcadebasketball | unknown | C | |
| concertrehearsal | unknown | C | |
| congest | unknown | C | |
| connectn | unknown | C | |
| connectthedots | unknown | C | |
| conquestcampaign | unknown | Ruby | |
| consecutivesums | unknown | C | |
| constrainedfreedomofchoice | unknown | C | |
| continuousmedian | unknown | C | |
| control | unknown | C | |
| conversationlog | unknown | C | |
| convexhull | unknown | C | |
| cookieselection | unknown | C | |
| cookingwater | unknown | C | |
| copsandrobbers | unknown | C | |
| costumecontest | unknown | Ruby | |
| countcircuits | unknown | C | |
| countingclauses | unknown | Ruby(2), Ruby | |
| countingstars | unknown | C , Python | |
| crackerbarrel | unknown | C | |
| crackingrsa | unknown | C | |
| cross | unknown | C | |
| crosscountry | unknown | C | |
| crypto | unknown | C | |
| cuchitunnels | unknown | C | |
| cups | unknown | Ruby | |
| cuttingbrownies | unknown | C | |
| daceydice | unknown | C | |
| dancerecital | unknown | C | |
| dasort | unknown | C | |
| deadend | unknown | C | |
| debugging | unknown | C | |
| deduplicatingfiles | unknown | C | |
| delimitersoup | unknown | C | |
| delivery | unknown | C | |
| deliveryperson | unknown | C | |
| detaileddifferences | unknown | Ruby | |
| diagonalcut | unknown | C | |
| dicebetting | unknown | C , Python | |
| digits | unknown | C | |
| digitsum | unknown | C , Python | |
| digitswap | unknown | C | |
| diplomacy | unknown | C | |
| disastrousdoubling | unknown | Python | |
| distinctivecharacter | unknown | C | |
| diversecookies | unknown | C | |
| divideby100 | unknown | Python | |
| divisible | unknown | C | |
| divisors | unknown | C | |
| dna | unknown | C | |
| dominatingduos | unknown | C | |
| dominoes2 | unknown | C | |
| doubleclique | unknown | C | |
| doublepassword | unknown | C | |
| doubleplusgood | unknown | C | |
| downtime | unknown | C | |
| dreamer | unknown | C | |
| drinkingsong | unknown | C | |
| driver | unknown | C | |
| drivingrange | unknown | C | |
| drunkvigenere | unknown | C | |
| dungeon | unknown | C | |
| dvds | unknown | C | |
| dyslectionary | unknown | C | |
| earlywinter | unknown | C | |
| eatingeverything | unknown | C | |
| eatingout | unknown | C | |
| echoechoecho | unknown | C | |
| eenymeeny | unknown | C | |
| electricaloutlets | unknown | Ruby | |
| elementarymath | unknown | C | |
| emergency | unknown | C | |
| emptyingbaltic | unknown | C | |
| enlarginghashtables | unknown | C | |
| epigdanceoff | unknown | C | |
| erraticants | unknown | C | |
| esej | unknown | C | |
| espressobucks | unknown | C | |
| eulersnumber | unknown | Ruby | |
| europeantrip | unknown | C | |
| everywhere | unknown | Ruby | |
| exactchange2 | unknown | C | |
| exam | unknown | Ruby | |
| exammanipulation | unknown | C | |
| excavatorexpedition | unknown | C | |
| excursion | unknown | C | |
| eyeofsauron | unknown | C | |
| factors | unknown | Ruby | |
| factovisors | unknown | C | |
| factstone | unknown | C | |
| failthemall | unknown | C | |
| falling | unknown | C | |
| farey | unknown | C | |
| faultyrobot | unknown | C | |
| favourable | unknown | C | |
| fenwick | unknown | C | |
| ferryloading3 | unknown | C | |
| ferryloading4 | unknown | C | |
| fiat | unknown | C | |
| fiftyshades | unknown | C | |
| finalexam2 | unknown | Ruby | |
| financialplanning | unknown | C | |
| findingana | unknown | C | |
| fire2 | unknown | C , Ruby | |
| fire3 | unknown | C | |
| firefly | unknown | Python | |
| firestation | unknown | C (2), C | |
| flagquiz | unknown | Ruby | |
| floodit | unknown | C , Ruby | |
| flowergarden | unknown | C | |
| flowerytrails | unknown | C | |
| flowfree | unknown | C | |
| fodelsedagsmemorisering | unknown | C | |
| fontan | unknown | C | |
| forcedchoice | unknown | C | |
| fractalarea | unknown | C | |
| fraction | unknown | C | |
| freckles | unknown | C | |
| freefood | unknown | C | |
| freeweights | unknown | C | |
| fridge | unknown | C | |
| froggie | unknown | C | |
| froshweek | unknown | C | |
| froshweek2 | unknown | C | |
| fruitbaskets | unknown | C | |
| fulltank | unknown | C | |
| fundamentalneighbors | unknown | C | |
| fyi | unknown | C | |
| gcds | unknown | C | |
| gcpc | unknown | C | |
| gears2 | unknown | Python | |
| geezerscripts | unknown | C | |
| genijalac | unknown | C | |
| geppetto | unknown | C | |
| gerrymandering | unknown | C | |
| gigcombinatorics | unknown | C | |
| goatrope | unknown | Ruby | |
| goblingardenguards | unknown | C | |
| goingdutch | unknown | C | |
| golombrulers | unknown | C | |
| goodcoalition | unknown | C | |
| goodmessages | unknown | C | |
| goodmorning | unknown | C | |
| gopher2 | unknown | C | |
| grading | unknown | C | |
| grandopening | unknown | C | |
| grapevine | unknown | C | |
| grass | unknown | C (2), C | |
| greatswercporto | unknown | C | |
| greedypolygons | unknown | C | |
| greetingcard | unknown | C , Ruby | |
| greetings2 | unknown | Ruby | |
| grid | unknown | C | |
| gridgame | unknown | C | |
| gridmst | unknown | C | |
| grille | unknown | C | |
| hailstone | unknown | C | |
| hangman | unknown | C | |
| happyprime | unknown | C | |
| harddrive | unknown | C | |
| hardwoodspecies | unknown | C | |
| harshadnumbers | unknown | Go, JavaScript, Ruby | |
| heimavinna | unknown | Ruby | |
| heirsdilemma | unknown | C , Ruby | |
| hello | unknown | Ruby | |
| heritage | unknown | C | |
| hideandseek | unknown | C (2), C | |
| highscore2 | unknown | C (2), C | |
| hindex | unknown | C | |
| honeyheist | unknown | C | |
| hopscotch | unknown | C | |
| horror | unknown | C | |
| horrorfilmnight | unknown | C | |
| hothike | unknown | C | |
| houselawn | unknown | C | |
| howl | unknown | C | |
| htoo | unknown | C | |
| humancannonball | unknown | C | |
| hydrasheads | unknown | Ruby | |
| icpcteamselection | unknown | C | |
| ignore | unknown | C | |
| iks | unknown | C | |
| imagedecoding | unknown | C | |
| improbable | unknown | unknown | C |
| includescoring | unknown | C | |
| increasingsubsequence | unknown | C | |
| industrialspy | unknown | C | |
| inflation | unknown | Ruby | |
| ingestion | unknown | C | |
| insert | unknown | Python | |
| installingapps | unknown | C | |
| integerdivision | unknown | Ruby | |
| integerlists | unknown | C | |
| intergalacticbidding | unknown | Ruby | |
| interpreter | unknown | C | |
| intersectingrectangles | unknown | C (2), C | |
| intervalcover | unknown | C | |
| ironcoal | unknown | C | |
| irrationaldivision | unknown | C | |
| isithalloween | unknown | Ruby | |
| island | unknown | C | |
| islandhopping | unknown | C | |
| islands3 | unknown | C | |
| iwannabe | unknown | Ruby | |
| jackolanternjuxtaposition | unknown | Ruby | |
| jackpot | unknown | C | |
| janitortroubles | unknown | C | |
| jobexpenses | unknown | C | |
| joinstrings | unknown | C | |
| jointattack | unknown | Ruby | |
| jollyjumpers | unknown | C | |
| joylessgame | unknown | C | |
| judging | unknown | C | |
| jumbledstring | unknown | C | |
| jumbojavelin | unknown | C | |
| jupiter | unknown | C | |
| justforsidekicks | unknown | C | |
| justpassingthrough | unknown | C | |
| kafkaesque | unknown | C | |
| kaleidoscopicpalindromes | unknown | C | |
| kastenlauf | unknown | C | |
| kattissquest | unknown | C | |
| kayaking | unknown | C | |
| keepitcool | unknown | C | |
| keyboardd | unknown | C | |
| keypad | unknown | C | |
| keytocrypto | unknown | C (2), C | |
| keywords | unknown | Ruby | |
| kingscolors | unknown | C | |
| kinkywordsearch | unknown | C | |
| kitchen | unknown | C | |
| kitchencombinatorics | unknown | C | |
| kleptography | unknown | Ruby | |
| knapsack | unknown | C | |
| knightjump | unknown | C | |
| knightsearch | unknown | C | |
| knightsfen | unknown | C | |
| knigsoftheforest | unknown | C | |
| knotknowledge | unknown | C | |
| krizaljka | unknown | Ruby | |
| kutevi | unknown | C | |
| ladice | unknown | C | |
| landequality | unknown | C | |
| laptopsticker | unknown | C | |
| lastfactorialdigit | unknown | Python | |
| licensetolaunch | unknown | Ruby | |
| limbo1 | unknown | C | |
| lipschitzconstant | unknown | C | |
| logo | unknown | Python | |
| longestcommonsubsequence | unknown | C | |
| longincsubseq | unknown | C | |
| longswaps | unknown | C | |
| loorolls | unknown | C | |
| lost | unknown | C | |
| lostlineup | unknown | Ruby | |
| lostmap | unknown | C | |
| luhnchecksum | unknown | Ruby | |
| lyklagangriti | unknown | C | |
| magical3 | unknown | C | |
| magicalcows | unknown | Ruby | |
| magictrick | unknown | C | |
| mali | unknown | C | |
| mandelbrot | unknown | C | |
| manhattanshopping | unknown | C | |
| marblestree | unknown | C | |
| marswindow | unknown | C | |
| mathhomework | unknown | C | |
| mathtrade | unknown | C | |
| maxflow | unknown | C | |
| maximizingwinnings | unknown | C | |
| maximumrent | unknown | C | |
| maximumsubarrays | unknown | C | |
| methodicmultiplication | unknown | C | |
| millionairemadness | unknown | C | |
| mincut | unknown | C | |
| minspantree | unknown | C (2), C | |
| missinggnomes | unknown | C | |
| missingnumber | unknown | C | |
| missingnumbers | unknown | Ruby | |
| mixedfractions | unknown | C | |
| modulodatastructures | unknown | C | |
| molekule | unknown | C | |
| moneymatters | unknown | C | |
| monitoringskipaths | unknown | C | |
| moscowdream | unknown | C | |
| moviecollection | unknown | C | |
| movingday | unknown | C | |
| muddyhike | unknown | C | |
| mult | unknown | C | |
| musicalchairs | unknown | C | |
| musiccollection | unknown | C | |
| muzicari | unknown | C | |
| names | unknown | C | |
| narrowartgallery | unknown | C (2), C | |
| natjecanje | unknown | C | |
| necklacedecomposition | unknown | C | |
| neighborhoodwatch | unknown | C | |
| nicknames | unknown | C | |
| nikola | unknown | C | |
| nine | unknown | C | |
| ninepacks | unknown | C | |
| ninetynine | unknown | C | |
| nizovi | unknown | C | |
| nnnnn | unknown | C (2), C | |
| noonerizedspumbers | unknown | C | |
| nothanks | unknown | C | |
| nsum | unknown | C | |
| numbersetseasy | unknown | C | |
| numbersetshard | unknown | C | |
| oddbinom | unknown | C (2), C | |
| oddecho | unknown | C | |
| oddmanout | unknown | Ruby | |
| officespace | unknown | C | |
| ofugsnuid | unknown | Ruby | |
| olderbrother | unknown | C | |
| onechicken | unknown | C | |
| ones | unknown | C , Python | |
| opensource | unknown | C | |
| orderlyclass | unknown | C | |
| orders | unknown | C | |
| ostgotska | unknown | C | |
| otherside | unknown | C | |
| otpor | unknown | C | |
| ovalwatch | unknown | C | |
| paintball | unknown | C | |
| paintings | unknown | C | |
| pairingsocks | unknown | C | |
| palindromesubstring | unknown | C | |
| palindromicpassword | unknown | C | |
| parkinglot | unknown | C | |
| partygame | unknown | C | |
| pascal | unknown | C | |
| pathtracing | unknown | C | |
| peasoup | unknown | Ruby | |
| pebblepuzzle | unknown | C | |
| pebblesolitaire2 | unknown | C | |
| peggamefortwo | unknown | C | |
| peragrams | unknown | C | |
| perica | unknown | C | |
| periodicstrings | unknown | C | |
| persistent | unknown | Python | |
| piano | unknown | C | |
| pianolessons | unknown | C | |
| pickupsticks | unknown | C | |
| pizza | unknown | C | |
| pizzahawaii | unknown | C | |
| planetaris | unknown | C | |
| plantingtrees | unknown | C , Ruby | |
| platforme | unknown | Python | |
| playground | unknown | C | |
| pleasegofirst | unknown | Ruby | |
| plusminus | unknown | C | |
| pokerhand | unknown | Ruby | |
| polish | unknown | C | |
| powerstrings | unknown | C | |
| prefixfreecode | unknown | C | |
| primalrepresentation | unknown | C | |
| primaryarithmetic | unknown | C | |
| primematrix | unknown | C | |
| primereduction | unknown | C | |
| princeandprincess | unknown | C | |
| princesspeach | unknown | C | |
| programmingtutors | unknown | C | |
| provincesandgold | unknown | C | |
| pseudoprime | unknown | C | |
| pubs | unknown | C | |
| pxs | unknown | C (2), C | |
| pyramidkonstruktion | unknown | C | |
| pyramids | unknown | C | |
| qaly | unknown | Ruby | |
| queens | unknown | C | |
| railway2 | unknown | C | |
| rainbowroads | unknown | C | |
| rankproblem | unknown | C | |
| ratingproblems | unknown | C | |
| rationalarithmetic | unknown | C | |
| rationalratio | unknown | Ruby | |
| rationalsequence | unknown | C | |
| recount | unknown | C , Ruby | |
| recovery | unknown | C | |
| rectanglesurrounding | unknown | C | |
| redbluetree | unknown | C | |
| relatives | unknown | C | |
| relocation | unknown | Go, JavaScript, Ruby | |
| remorse | unknown | C | |
| repeatedsubstrings | unknown | C | |
| repeatingdecimal | unknown | Python | |
| restaurant | unknown | C | |
| restroommonitor | unknown | C | |
| retribution | unknown | C | |
| reversebinary | unknown | C | |
| rings2 | unknown | C | |
| riseandfall | unknown | C | |
| roberthood | unknown | C | |
| robotprotection | unknown | C | |
| rockscissorspaper | unknown | C | |
| rollercoasterfun | unknown | C | |
| romans | unknown | Ruby | |
| roompainting | unknown | C | |
| rotatecut | unknown | C | |
| roundedbuttons | unknown | C | |
| runningmom | unknown | C | |
| safe | unknown | C | |
| safehouses | unknown | C | |
| safepassage | unknown | C | |
| satisfiability | unknown | C | |
| savingforretirement | unknown | C | |
| savinguniverse | unknown | C | |
| scenes | unknown | C (2), C | |
| schoolspirit | unknown | C | |
| score | unknown | Ruby | |
| scrollingsign | unknown | C | |
| secretmessage | unknown | C | |
| securedoors | unknown | Ruby | |
| selectgroup | unknown | C | |
| selfsimilarstrings | unknown | C | |
| sequence | unknown | C | |
| sequences | unknown | C | |
| setnja | unknown | Python | |
| settlers2 | unknown | C | |
| shiritori | unknown | C | |
| shortcut | unknown | C | |
| shortestpath1 | unknown | C | |
| shortestpath2 | unknown | C | |
| shortestpath3 | unknown | C | |
| shuffles | unknown | C | |
| shuffling | unknown | C | |
| sifferprodukt | unknown | C | |
| sim | unknown | C | |
| skocimis | unknown | C | |
| slikar | unknown | C | |
| smallestmultiple | unknown | Python | |
| smallschedule | unknown | C | |
| smil | unknown | C | |
| smoothiestand | unknown | C | |
| snowflakes | unknown | C | |
| softpasswords | unknown | C | |
| somesum | unknown | C | |
| sort | unknown | C | |
| sorttwonumbers | unknown | C | |
| speeding | unknown | C | |
| speedyescape | unknown | C (2), C (3), C | |
| spiderman | unknown | C | |
| spiral | unknown | C | |
| squaredeal | unknown | C | |
| squarepegs | unknown | C | |
| squawk | unknown | C | |
| sretan | unknown | C | |
| standings | unknown | C | |
| statistics | unknown | C | |
| stopwatch | unknown | C | |
| streamlag | unknown | C | |
| stringmatching | unknown | C | |
| subprime | unknown | C | |
| subseqhard | unknown | C | |
| suffixarrayreconstruction | unknown | C | |
| summertrip | unknown | Ruby | |
| sumsquareddigits | unknown | Ruby | |
| supercomputer | unknown | C | |
| suspensionbridges | unknown | C | |
| swaptosort | unknown | C | |
| symmetricorder | unknown | Ruby | |
| synchronizinglists | unknown | C | |
| taisformula | unknown | C | |
| tautology | unknown | C | |
| teacherevaluation | unknown | C | |
| teamup | unknown | C | |
| temperatureconfusion | unknown | C | |
| tenis | unknown | Ruby | |
| tenkici | unknown | C | |
| teque | unknown | C | |
| ternarianweights | unknown | C | |
| tetris | unknown | C | |
| textencryption | unknown | C | |
| thanos | unknown | C | |
| thanosthehero | unknown | C | |
| thegrandadventure | unknown | C | |
| thekingofthenorth | unknown | C | |
| thelastproblem | unknown | C | |
| themepark | unknown | C | |
| thesaurus | unknown | C | |
| thinkingofanumber | unknown | C | |
| thisaintyourgrandpascheckerboard | unknown | C | |
| thore | unknown | C | |
| tictactoe2 | unknown | C | |
| tildes | unknown | C | |
| timing | unknown | Ruby | |
| tolower | unknown | C | |
| tomography | unknown | C (2), C | |
| torn2pieces | unknown | C | |
| tornbygge | unknown | C | |
| touchdown | unknown | C | |
| tourguide | unknown | C | |
| tourists | unknown | C | |
| tournamentseeding | unknown | C | |
| tractor | unknown | C | |
| traffic | unknown | C | |
| trainsorting | unknown | C | |
| transitwoes | unknown | Ruby | |
| transportation | unknown | C | |
| tray | unknown | C | |
| treehopping | unknown | C | |
| treehouses | unknown | C | |
| tri | unknown | C | |
| triangles3 | unknown | C | |
| triangularcollection | unknown | C | |
| triarea | unknown | C | |
| trick | unknown | C (2), C | |
| trickshot | unknown | C | |
| tricktreat | unknown | C | |
| trilemma | unknown | C | |
| trip2007 | unknown | C | |
| tripletexting | unknown | C | |
| trojke | unknown | C | |
| tsp | unknown | C | |
| turbo | unknown | C | |
| tutorial | unknown | C | |
| twosum | unknown | C | |
| ummcode | unknown | C | |
| units | unknown | C | |
| unreadmessages | unknown | C | |
| upprodun | unknown | C | |
| urbandesign | unknown | C | |
| uxuhulvoting | unknown | C | |
| vajningsplikt | unknown | C | |
| vegetables | unknown | C | |
| victorythroughsynergy | unknown | C | |
| videospeedup | unknown | C | |
| vindiagrams | unknown | C | |
| virtualfriends | unknown | C | |
| virus | unknown | C | |
| visualgo | unknown | C | |
| vudu | unknown | C | |
| vuk | unknown | C | |
| waif | unknown | C | |
| walkforest | unknown | C | |
| walkway | unknown | C | |
| walls | unknown | C | |
| walrusweights | unknown | C | |
| warehouse | unknown | Ruby | |
| waronweather | unknown | C | |
| weather | unknown | C | |
| weightofwords | unknown | C | |
| welcomehard | unknown | C | |
| wettiles | unknown | C | |
| wffnproof | unknown | C | |
| wheels | unknown | C | |
| wheretolive | unknown | C | |
| whogoesthere | unknown | C | |
| woodcutting | unknown | C | |
| wordladder2 | unknown | C | |
| workstations | unknown | C | |
| worstweather | unknown | C | |
| wrapping | unknown | C | |
| zagrade | unknown | C | |
| zebrasocelots | unknown | C | |
| zigzag | unknown | C | |
| zigzag2 | unknown | C , Ruby | |
| zipfsong | unknown | C | |
| zoninghouses | unknown | C |