Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % ▴ Users
Guess the Sequence Uncategorized 3p 5.9% 185
CCC '11 J1 - Which Alien? CCC 3 35.6% 6372
CCC '05 J1 - The Cell Sell CCC 3 8.0% 1450
CCC '05 J2 - RSA Numbers CCC 3 40.8% 2974
CCC '05 J3 - Returning Home CCC 5 37.2% 2358
CCC '05 J5 - Bananas CCC 10 21.6% 1467
CCC '06 J2 - Roll the Dice CCC 3 27.1% 3032
CCC '06 S5 - Origin of Life CCC 15 18.7% 116
CCC '06 J3 - Cell-Phone Messaging CCC 3 41.3% 1464
CCC '06 J1 - Canadian Calorie Counting CCC 3 27.4% 7190
CCC '11 J2 - Who Has Seen The Wind CCC 5 25.7% 1859
CCC '11 J3 - Sumac Sequences CCC 5 43.3% 2867
CCC '06 J4 - It's tough being a teen! CCC 7 41.5% 1241
CCC '11 J4 - Boring Business CCC 7 27.8% 1505
CCC '06 S1 - Maternity CCC 5 37.5% 1146
CCC '06 S2 - Attack of the CipherTexts CCC 5 5.1% 235
CCC '06 S3 - Tin Can Telephone CCC 12 20.8% 526
CCC '06 S4 - Groups CCC 10 46.5% 326
CCC '11 S1 - English or French? CCC 5 35.5% 5748
CCC '08 S3 - Maze CCC 7 29.3% 1561
CCC '03 S4 - Substrings CCC 15p 7.7% 370
CCC '04 J1 - Squares CCC 3 32.5% 6122
CCC '04 J2 - Terms of Office CCC 3 37.4% 3512
CCC '04 J3 - Smile with Similes CCC 3 57.8% 3969
CCC '04 J4 - Simple Encryption CCC 5 51.1% 1711
CCC '04 J5 - Fractals CCC 10 35.7% 220
CCC '07 J1 - Who is in the Middle? CCC 3 47.0% 9141
CCC '07 J2 - I Speak TXTMSG CCC 3 21.8% 2280
CCC '07 J3 - Deal or No Deal Calculator CCC 3 33.0% 3246
CCC '07 J5 - Keep on Truckin' CCC 7 19.7% 1069
CCC '07 S5 - Bowling for Numbers CCC 10p 29.9% 864
CCC '08 J1 - Body Mass Index CCC 3 34.8% 5614
CCC '08 J2 - Do the Shuffle CCC 3 43.2% 3411
CCC '08 J3 - GPS Text Entry CCC 3 56.0% 1338
CCC '08 J4 - From Prefix to Postfix CCC 7 42.9% 887
CCC '08 S5 - Nukit CCC 10p 37.2% 705
CCC '08 S1 - It's Cold Here! CCC 5 37.4% 2172
CCC '08 S2 - Pennies in the Ring CCC 5 30.5% 1182
CCC '08 S4 - Twenty-four CCC 10 25.4% 738
CCC '96 S4 - When in Rome CCC 10 33.0% 569
CCC '13 S4 - Who is Taller? CCC 7 16.8% 1226
CCC '05 S1 - Snow Calls CCC 5 43.3% 2276
CCC '05 S2 - Mouse Move CCC 5 37.2% 1684
CCC '10 J1 - What is n, Daddy? CCC 3 30.8% 4013
CCC '10 J2 - Up and Down CCC 5 21.8% 2046
CCC '10 J3 - Punchy CCC 5 33.0% 1395
CCC '10 J4 - Global Warming CCC 5p 22.5% 1055
CCC '10 J5 - Knight Hop CCC 7 36.6% 2400
CCC '09 J2 - Old Fishin' Hole CCC 5 39.1% 1584
CCC '09 J3 - Good Times CCC 5 20.3% 1378