Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users
CCC '05 J5 - Bananas CCC 10p 21.9% 1624
CCC '05 S1 - Snow Calls CCC 5p 43.6% 2555
CCC '05 S2 - Mouse Move CCC 5p 37.8% 1866
CCC '05 S3 - Quantum Operations CCC 10p 34.3% 516
CCC '05 S4 - Pyramid Message Scheme CCC 10p 34.9% 926
CCC '05 S5 - Pinball Ranking CCC 12p 19.4% 811
CCC '06 J1 - Canadian Calorie Counting CCC 3p 27.0% 8754
CCC '06 J2 - Roll the Dice CCC 3p 27.6% 3501
CCC '06 J3 - Cell-Phone Messaging CCC 3p 41.5% 1819
CCC '06 J4 - It's tough being a teen! CCC 7p 41.0% 1458
CCC '06 J5 - CCC Othello CCC 10p 35.5% 286
CCC '06 S1 - Maternity CCC 5p 37.2% 1288
CCC '06 S2 - Attack of the CipherTexts CCC 5p 6.6% 426
CCC '06 S3 - Tin Can Telephone CCC 12p 20.7% 615
CCC '06 S4 - Groups CCC 10p 45.6% 374
CCC '06 S5 - Origin of Life CCC 15p 20.0% 144
CCC '07 J1 - Who is in the Middle? CCC 3p 47.2% 10862
CCC '07 J2 - I Speak TXTMSG CCC 3p 22.6% 2735
CCC '07 J3 - Deal or No Deal Calculator CCC 3p 32.5% 4002
CCC '07 J4 - Anagram Checker CCC 5p 38.3% 2566
CCC '07 J5 - Keep on Truckin' CCC 7p 20.7% 1251
CCC '07 S1 - Federal Voting Age CCC 3p 36.5% 2550
CCC '07 S2 - Boxes CCC 5p 27.1% 1365
CCC '07 S3 - Friends CCC 7p 37.5% 1882
CCC '07 S4 - Waterpark CCC 7p 31.7% 1657
CCC '07 S5 - Bowling for Numbers CCC 10p 30.3% 963
CCC '08 J1 - Body Mass Index CCC 3p 27.1% 4889
CCC '08 J2 - Do the Shuffle CCC 3p 42.1% 4229
CCC '08 J3 - GPS Text Entry CCC 3p 56.9% 1647
CCC '08 J4 - From Prefix to Postfix CCC 7p 43.6% 1052
CCC '08 S1 - It's Cold Here! CCC 5p 37.5% 2402
CCC '08 S2 - Pennies in the Ring CCC 5p 31.4% 1336
CCC '08 S3 - Maze CCC 7p 29.6% 1771
CCC '08 S4 - Twenty-four CCC 10p 25.9% 1171
CCC '08 S5 - Nukit CCC 10p 37.6% 811
CCC '09 J1 - ISBN CCC 3p 47.6% 4202
CCC '09 J2 - Old Fishin' Hole CCC 5p 38.7% 1963
CCC '09 J3 - Good Times CCC 5p 16.1% 1368
CCC '09 J4 - Signage CCC 7p 29.1% 850
CCC '09 S1 - Cool Numbers CCC 5p 23.2% 2224
CCC '09 S2 - Lights Going On and Off CCC 10p 39.5% 1021
CCC '09 S3 - Degrees Of Separation CCC 10p 28.1% 1537
CCC '09 S4 - Shop and Ship CCC 10p 21.0% 1155
CCC '09 S5 - Wireless CCC 12p 35.4% 688
CCC '10 J1 - What is n, Daddy? CCC 3p 29.7% 4360
CCC '10 J2 - Up and Down CCC 5p 22.4% 2418
CCC '10 J3 - Punchy CCC 5p 32.8% 1651
CCC '10 J4 - Global Warming CCC 5p 22.9% 1224
CCC '10 J5 - Knight Hop CCC 7p 36.5% 2776
CCC '10 S1 - Computer Purchase CCC 5p 14.6% 1497