Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users
Mock CCC '20 Contest 2 S3 - Tree Programming Mock CCC 10p 15.8% 103
Mock CCC '20 Contest 2 S4 - Rotational Arrays Mock CCC 10p 12.1% 66
Mock CCC '20 Contest 2 S5 - Sticks Mock CCC 20p 3.0% 5
Mock CCC '22 Contest 1 J1 - Square Root Decomposition Mock CCC 3 38.6% 770
Mock CCC '22 Contest 1 J2 - Biking and Hiking Mock CCC 3 32.8% 633
Mock CCC '22 Contest 1 J3 - String Crossing Maximization Mock CCC 7p 12.7% 275
Mock CCC '22 Contest 1 J4 - Snowball Fight Mock CCC 5p 16.1% 256
Mock CCC '22 Contest 1 J5 - New Year's Restrictions Mock CCC 7p 26.4% 169
Mock CCC '22 Contest 2 J1 - Opening Ceremony Mock CCC 3 48.2% 843
Mock CCC '22 Contest 2 J2 - Snowboarding Championship Mock CCC 3 36.3% 691
Mock CCC '22 Contest 2 J3 - Figure Skating Fun Mock CCC 5p 30.6% 561
Mock CCC '22 Contest 2 J4 - Hockey Bracket Mock CCC 7p 17.7% 203
Mock CCC '22 Contest 2 J5 - Dominating the Olympics Mock CCC 10 15.5% 104
Mock CCC '23 Contest 1 J1 - Final Velocity Mock CCC 3 66.2% 1010
Mock CCC '23 Contest 1 J2 - Healthy Schedule Mock CCC 3 37.0% 735
Mock CCC '23 Contest 1 J3 - Pairing Gifts Mock CCC 5p 13.6% 310
Mock CCC '23 Contest 1 J4 - String Decryption Mock CCC 5p 17.1% 197
Mock CCC '23 Contest 1 J5 - Calculus Problem Mock CCC 12p 10.2% 46
Mock CCC '24 Contest 1 J1 - Lemon Bathtub Mock CCC 3 56.4% 781
Mock CCC '24 Contest 1 J2 - Simple Elo Rating System Mock CCC 3 30.6% 302
Mock CCC '24 Contest 1 J3 - RGB Words Mock CCC 5p 11.5% 258
Mock CCC '24 Contest 1 J5 - Mathland Mock CCC 10p 8.2% 39
Mock CCC '24 Contest 1 J4/S1 - Magical Magnetic Marbles Mock CCC 5p 11.6% 312
Mock CCC '24 Contest 1 S2 - Owen the Toucan Mock CCC 7p 31.8% 221
Mock CCC '24 Contest 1 S3 - Optimal Split Point Mock CCC 10p 3.4% 38
Mock CCC '24 Contest 1 S4 - Tommy's Lemonade Stand Mock CCC 12p 22.2% 31
Mock CCC '24 Contest 1 S5 - Mock CCC 2025 Mock CCC 20p 13.9% 24
Mock CCO '17 Problem 1 - Fast Fuhrer Transform Mock CCO 10p 25.0% 62
Mock CCO '17 Problem 2 - Penetrating Power Mock CCO 17p 25.8% 183
Mock CCO '17 Problem 3 - Connection Mock CCO 20p 12.6% 39
Mock CCO '17 Problem 4 - Guards Mock CCO 15p 17.8% 55
Mock CCO '17 Problem 5 - Blitzkrieg Mock CCO 17p 13.3% 14
Mock CCO '17 Problem 6 - Dire Consequences Mock CCO 20 24.7% 26
Mock CCO '19 Contest 1 Problem 4 - A Chemistry Problem Mock CCO 15p 15.8% 15
Mock CCO '19 Contest 1 Problem 5 - A Tree Problem Mock CCO 25p 17.4% 13
Mock CCO '19 Contest 1 Problem 6 - A Geometry Problem Mock CCO 15p 27.4% 22
Mock CCO '19 Contest 2 Problem 1 - A Dynamic Connectivity Problem Mock CCO 15p 31.3% 73
Mock CCO '19 Contest 2 Problem 2 - A Simulation Problem Mock CCO 15p 10.7% 8
Mock CCO '19 Contest 2 Problem 3 - A Cactus Problem Mock CCO 15p 5.6% 8
Mock CCO '19 Contest 2 Problem 4 - A Geometry Problem Mock CCO 5p 12.9% 10
Mock CCO '19 Contest 2 Problem 5 - A Geometry Problem Mock CCO 12p 9.4% 4
Mock CCO '19 Contest 2 Problem 6 - A Fundraising Problem Mock CCO 12p 14.5% 45
MCIPC Contest 1 P1 - Factoring Uncategorized 3 28.6% 99
MCIPC Contest 1 P2 - Infinite Chessboard Uncategorized 3 54.3% 94
MCIPC Contest 1 P3 - Cypher Uncategorized 5p 33.8% 71
MCIPC Contest 1 P4 - Snack Line Uncategorized 7p 15.4% 25
MCIPC Contest 1 P5 - Rainwater Uncategorized 7 19.9% 29
MCIPC Contest 2 P1 - Super Mega Snowball Uncategorized 3 40.4% 62
MCIPC Contest 2 P2 - Icicles Uncategorized 3 40.6% 82
MCIPC Contest 2 P3 - Snowy Streets Uncategorized 5p 31.4% 59