Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users
Back to School '24 P2 - Cheating Uncategorized 10p 25.5% 227
Back to School '24 P3 - Tournament Uncategorized 12 35.3% 152
Back to School '24 P4 - Candidates Uncategorized 15p 16.6% 80
Back to School '24 P5 - Snitching Uncategorized 15p 12.1% 68
Building Uncategorized 10p 24.3% 49
Bus Stops Uncategorized 10 24.0% 27
The Cake is a Dessert Uncategorized 10 29.7% 223
Calendar Contest Problem 2 — Day of the Week Seasonal 10 5.0% 9
Calendar Contest Problem 3 — Classical Maya Seasonal 10 11.4% 8
Calendar Contest Problem 4 — Savvyday 29 Oatmeal 94 Seasonal 10 1.0% 3
Calendar Contest Problem 5 — Reign of Terror Uncategorized 15 3.3% 2
Canada Day Contest 2021 - CCC Bad Haha Seasonal 12 35.5% 262
Canada Day Contest 2021 - Starfall Seasonal 15 32.4% 112
Stingy Candyman Uncategorized 10 25.3% 40
Caporegime Uncategorized 10p 27.5% 35
Casino Crisis Uncategorized 12p 33.9% 65
Castle Invasion Uncategorized 10p 23.6% 135
CCC '00 S5 - Sheep and Coyotes CCC 10p 4.3% 193
CCC '01 S4 - Cookies CCC 10 18.8% 435
CCC '01 S5 - Post's Correspondence Problem CCC 10 28.8% 324
CCC '02 S3 - Blindfold CCC 15 6.3% 160
CCC '02 S4 - Bridge Crossing CCC 10p 37.3% 927
CCC '02 S5 - Follow the Bouncing Ball CCC 10p 10.6% 163
CCC '03 S4 - Substrings CCC 15p 7.8% 395
CCC '03 S5 - Trucking Troubles CCC 10p 17.7% 704
CCC '04 J5 - Fractals CCC 10 36.2% 230
CCC '04 S3 - Spreadsheet CCC 10 27.3% 628
CCC '04 S4 - Space Turtle CCC 10p 20.0% 192
CCC '04 S5 - Super Plumber CCC 10p 23.9% 419
CCC '05 J5 - Bananas CCC 10 21.5% 1501
CCC '05 S3 - Quantum Operations CCC 10p 34.4% 464
CCC '05 S4 - Pyramid Message Scheme CCC 10 35.7% 855
CCC '05 S5 - Pinball Ranking CCC 12p 19.4% 767
CCC '06 J5 - CCC Othello CCC 10p 36.7% 242
CCC '06 S3 - Tin Can Telephone CCC 12 20.6% 543
CCC '06 S4 - Groups CCC 10 45.1% 347
CCC '06 S5 - Origin of Life CCC 15 19.8% 127
CCC '07 S5 - Bowling for Numbers CCC 10p 30.2% 899
CCC '08 S4 - Twenty-four CCC 10 25.4% 866
CCC '08 S5 - Nukit CCC 10p 37.4% 731
CCC '09 S2 - Lights Going On and Off CCC 10 41.0% 927
CCC '09 S3 - Degrees Of Separation CCC 10 28.0% 1398
CCC '09 S4 - Shop and Ship CCC 10 20.9% 1051
CCC '09 S5 - Wireless CCC 12p 35.2% 651
CCC '10 S3 - Firehose CCC 15p 18.9% 706
CCC '10 S4 - Animal Farm CCC 15p 25.7% 542
CCC '11 S3 - Alice Through the Looking Glass CCC 10p 36.2% 1239
CCC '11 S4 - Blood Distribution CCC 15p 8.1% 170
CCC '11 S5 - Switch CCC 12p 17.6% 427
CCC '12 S4 - A Coin Game CCC 15 27.0% 475