ID Problem Show tags Hide tags AC / Tried Difficulty
1477 CSQUARE  Powered and Squared 0 / 0 (None)
3622 CSTATE1  Chessboard State 1: National Chess Tournament 0 / 0 (None)
3623 CSTATE2  Chessboard State 2: International Chess Tournament 0 / 0 (None)
3624 CSTATE3  Chessboard State 3: Intergalactic Chess Tournament 0 / 0 (None)
230 CSTREET  Cobbled streets 0 / 0 (None)
703 CSUBSEQS  Common Subsequences 0 / 0 (None)
1189 CT  Counting triangles 0 / 0 (None)
1329 CT10R3B  Fence 0 / 0 (None)
1308 CT14E  Camels 0 / 0 (None)
1330 CT16E  Fish 0 / 0 (None)
1338 CT23E  Tree game 0 / 0 (None)
1358 CT25C  Roads in Berland 0 / 0 (None)
1301 CT101CC  Making Chess Boards 0 / 0 (None)
179 CTAIN  Containers 0 / 0 (None)
1320 CTFLAG  Flag 0 / 0 (None)
187 CTGAME  City Game 0 / 0 (None)
1342 CTOI09_1  IOI2009 Mecho 0 / 0 (None)
1341 CTOI10D1  MP3 Player 0 / 0 (None)
1339 CTOI10D2  PIN 0 / 0 (None)
1340 CTOI10D3  A HUGE TOWER 0 / 0 (None)
3052 CTPDIRTY  Dirty Plates 0 / 0 (None)
3051 CTPLUCKY  Super Lucky Palindromes 0 / 0 (None)
376 CTRICK  Card Trick 0 / 0 (None)
1981 CTSTRING  Count Strings 0 / 0 (None)
3705 CTTC  Counting Child 0 / 0 (None)
1700 CUBARTWK  Cubist Artwork 0 / 0 (None)
3002 CUBE  HYPERCUBES 0 / 0 (None)
1737 CUBEFR  Cube Free Numbers 0 / 0 (None)
1686 CUBEND  Suffix Of Cube 0 / 0 (None)
196 CUBERT  Cube Root 0 / 0 (None)
338 CUBES  Perfect Cubes 0 / 0 (None)
3427 CUBNUM  Cube Numbers 0 / 0 (None)
969 CUCKOO  Cuckoo Hashing 0 / 0 (None)
3118 CURDPROD  CURD PRODUCERS 0 / 0 (None)
1387 CURSE  The Pharaoh Curse 0 / 0 (None)
2112 CUSTOMSL  Customs 0 / 0 (None)
2827 CUTCAKE  Eat all the brownies ! 0 / 0 (None)
63 CUTOUT  Cutting out 0 / 0 (None)
83 CUTSQRS  Cutting off Squares 0 / 0 (None)
893 CVJETICI  Cvjetici 0 / 0 (None)
906 CVXPOLY  Convex Polygons 0 / 0 (None)
2989 CWB  Chipmunks with Brain 0 / 0 (None)
3209 CWC2015  CWC-2015 0 / 0 (None)
2985 CWORLD  A Colorful world 0 / 0 (None)
1097 CYCLERUN  Riding in cycles 0 / 0 (None)
3933 CYCLINGS  Distinct Cyclings 0 / 0 (None)
461 CYLINDER  Cylinder 0 / 0 (None)
1808 CYLINDES  Shortest Path on a Cylinder 0 / 0 (None)
396 CZ_PROB1  Summing to a Square Prime 0 / 0 (None)
3819 DABRI001  Noel and His Reindeer 0 / 0 (None)
1048 DAGCNT  Counting Arborescence 0 / 0 (None)
1121 DAGCNT2  Counting in a DAG 0 / 0 (None)
3513 DALTSUM  Descending Alternating Sums 0 / 0 (None)
56 DANCE  The Gordian Dance 0 / 0 (None)
3168 DANDVIOL  Dandiya Night and Violence 0 / 0 (None)
509 DANGER  In Danger 0 / 0 (None)
2344 DAP  Dynamic Assignment Problem 0 / 0 (None)
2249 DARKASLT  Dark Assault 0 / 0 (None)
1923 DARTS  Darts 0 / 0 (None)
2168 DAVIDG  Davids Greed 0 / 0 (None)
3119 DBALLZ  Help the Heroes 0 / 0 (None)
1778 DCD  DCD 0 / 0 (None)
2740 DCEPC11B  Boring Factorials 0 / 0 (None)
2738 DCEPC11C  Challenge Accepted 0 / 0 (None)
2743 DCEPC11E  Easy Password 0 / 0 (None)
2737 DCEPC11F  Football Fever 0 / 0 (None)
2739 DCEPC11I  Impossible Boss 0 / 0 (None)
2741 DCEPC11J  Jailbreak 0 / 0 (None)
2813 DCEPC12B  Bits Game 0 / 0 (None)
2814 DCEPC12D  Dazzling Pearls 0 / 0 (None)
2815 DCEPC12E  End of Fun 0 / 0 (None)
2816 DCEPC12F  Fitting in the Team 0 / 0 (None)
2817 DCEPC12G  G Force 0 / 0 (None)
2818 DCEPC12H  Height of Expectation 0 / 0 (None)
2819 DCEPC12J  Joy of Arbitrage 0 / 0 (None)
3190 DCEPC13D  The Ultimate Riddle 0 / 0 (None)
3189 DCEPC13F  Help Me Please! 0 / 0 (None)
3219 DCEPC14A  Another Version of Inversion 0 / 0 (None)
3220 DCEPC14C  The Long Pile Game 0 / 0 (None)
3221 DCEPC14D  Finding GP 0 / 0 (None)
3222 DCEPC14F  The Toy Store 0 / 0 (None)
3223 DCEPC14G  God of Nim 0 / 0 (None)
3224 DCEPC14H  Watchers On The Wall 0 / 0 (None)
2109 DCEPC200  The Prime Minister 0 / 0 (None)
2104 DCEPC202  Unique Paths 0 / 0 (None)
2108 DCEPC203  Obsession 0 / 0 (None)
2102 DCEPC204  Unlock it ! 0 / 0 (None)
2103 DCEPC206  Its a Murder! 0 / 0 (None)
2105 DCEPC207  Finally a Treat 0 / 0 (None)
2116 DCEPC301  Foodie Golu 0 / 0 (None)
2162 DCEPC501  Save Thy Toys 0 / 0 (None)
2163 DCEPC502  Just Like the Good Old Days 0 / 0 (None)
2161 DCEPC504  The Indian Connection 0 / 0 (None)
2160 DCEPC505  Bazinga! 0 / 0 (None)
2167 DCEPC604  Unlock it ! Part 2 0 / 0 (None)
2175 DCEPC701  Amazing Maze 0 / 0 (None)
2176 DCEPC702  NOS 0 / 0 (None)
2177 DCEPC703  Totient Game 0 / 0 (None)
2178 DCEPC705  Weird Points 0 / 0 (None)
2179 DCEPC706  Meeting For Party 0 / 0 (None)

Categories

Lucky

Pick a problem randomly based on the current filter.