Problems

Problem search

Point range
Go Random

Hot problems

Problem ▾ Category Points AC % Users
CCC '99 S5 - Letter Arithmetic CCC 12 16.0% 77
CCC '99 S4 - A Knightly Pursuit CCC 12 18.7% 348
CCC '99 S3 - Divided Fractals CCC 7 16.5% 68
CCC '99 S2 - Year 2000 CCC 7 14.6% 105
CCC '99 S1 - Card Game CCC 5 31.3% 1001
CCC '98 S5 - Mountain Passage CCC 10 13.0% 148
CCC '98 S4 - Lottery CCC 10 9.6% 92
CCC '98 S3 - Mars Rover CCC 7p 16.5% 161
CCC '98 S2 - Cross Number Puzzle CCC 5 43.1% 495
CCC '98 S1 - Censor CCC 5 37.5% 1476
CCC '97 S5 - Long Division CCC 10 9.9% 65
CCC '97 S4 - Dynamic Dictionary Coding CCC 5 11.8% 221
CCC '97 S3 - Double Knockout Competition CCC 5 10.3% 169
CCC '97 S2 - Nasty Numbers CCC 5 46.0% 797
CCC '97 S1 - Sentences CCC 5 29.4% 1021
CCC '96 S5 - Maximum Distance CCC 7 25.4% 417
CCC '96 S4 - When in Rome CCC 10 33.0% 569
CCC '96 S3 - Pattern Generator CCC 5 11.0% 355
CCC '96 S2 - Divisibility by 11 CCC 7 6.8% 179
CCC '96 S1 - Deficient, Perfect, and Abundant CCC 5 32.3% 1894
CCC '24 S5 - Chocolate Bar Partition CCC 20p 9.8% 21
CCC '24 S4 - Painting Roads CCC 12p 35.9% 164
CCC '24 S3 - Swipe CCC 10p 17.5% 172
CCC '24 S2 - Heavy-Light Composition CCC 5p 55.0% 451
CCC '24 S1 - Hat Circle CCC 3p 68.2% 499
CCC '24 J5 - Harvest Waterloo CCC 7p 37.7% 349
CCC '24 J4 - Troublesome Keys CCC 5p 22.0% 308
CCC '24 J3 - Bronze Count CCC 5p 47.0% 484
CCC '24 J2 - Dusa And The Yobis CCC 3p 61.1% 492
CCC '24 J1 - Conveyor Belt Sushi CCC 3p 76.8% 607
CCC '23 S5 - The Filter CCC 20p 16.3% 88
CCC '23 S4 - Minimum Cost Roads CCC 15p 19.6% 256
CCC '23 S3 - Palindromic Poster CCC 10p 15.4% 420
CCC '23 S2 - Symmetric Mountains CCC 7p 26.5% 815
CCC '23 S1 - Trianglane CCC 5p 32.0% 1720
CCC '23 J5 - CCC Word Hunt CCC 10p 24.2% 532
CCC '23 J3 - Special Event CCC 5p 38.3% 1301
CCC '23 J2 - Chili Peppers CCC 3p 53.5% 1634
CCC '23 J1 - Deliv-e-droid CCC 3p 55.4% 1733
CCC '22 S5 - Good Influencers CCC 17p 32.6% 186
CCC '22 S4 - Good Triplets CCC 15p 28.5% 310
CCC '22 S3 - Good Samples CCC 10p 18.3% 656
CCC '22 S2 - Good Groups CCC 5p 26.1% 1562
CCC '22 S1 - Good Fours and Good Fives CCC 5p 39.4% 2132
CCC '22 J5 - Square Pool CCC 10p 20.5% 464
CCC '22 J3 - Harp Tuning CCC 5p 33.2% 1500
CCC '22 J2 - Fergusonball Ratings CCC 3 47.5% 2682
CCC '22 J1 - Cupcake Party CCC 3 55.3% 2930
CCC '21 S5 - Math Homework CCC 15p 24.4% 419
CCC '21 S4 - Daily Commute CCC 12p 26.0% 585