Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users
Mock CCC '24 Contest 1 J4/S1 - Magical Magnetic Marbles Mock CCC 5p 11.5% 264
Mock CCC '24 Contest 1 S2 - Owen the Toucan Mock CCC 7p 32.5% 196
Mock CCC '24 Contest 1 S3 - Optimal Split Point Mock CCC 10p 2.9% 26
Mock CCC '24 Contest 1 S4 - Tommy's Lemonade Stand Mock CCC 12p 22.0% 29
Mock CCC '24 Contest 1 S5 - Mock CCC 2025 Mock CCC 20p 15.1% 21
Mock CCO '17 Problem 1 - Fast Fuhrer Transform Mock CCO 10p 25.5% 62
Mock CCO '17 Problem 2 - Penetrating Power Mock CCO 17p 25.8% 172
Mock CCO '17 Problem 3 - Connection Mock CCO 20p 12.6% 39
Mock CCO '17 Problem 4 - Guards Mock CCO 15p 17.6% 54
Mock CCO '17 Problem 5 - Blitzkrieg Mock CCO 17p 13.0% 13
Mock CCO '17 Problem 6 - Dire Consequences Mock CCO 20 25.8% 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 13.9% 9
Mock CCO '19 Contest 1 Problem 6 - A Geometry Problem Mock CCO 15p 28.1% 18
Mock CCO '19 Contest 2 Problem 1 - A Dynamic Connectivity Problem Mock CCO 15p 31.0% 71
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 6.2% 7
Mock CCO '19 Contest 2 Problem 4 - A Geometry Problem Mock CCO 5p 13.0% 9
Mock CCO '19 Contest 2 Problem 5 - A Geometry Problem Mock CCO 12p 4.3% 2
Mock CCO '19 Contest 2 Problem 6 - A Fundraising Problem Mock CCO 12p 17.1% 36
MCIPC Contest 1 P1 - Factoring Uncategorized 3 26.8% 87
MCIPC Contest 1 P2 - Infinite Chessboard Uncategorized 3 49.7% 80
MCIPC Contest 1 P1 - Cypher Uncategorized 5p 36.9% 59
MCIPC Contest 1 P4 - Snack Line Uncategorized 7p 15.8% 15
MCIPC Contest 1 P5 - Rainwater Uncategorized 7 22.4% 19
MCIPC Contest 2 P1 - Super Mega Snowball Uncategorized 3 39.7% 49
MCIPC Contest 2 P2 - Icicles Uncategorized 3 39.9% 67
MCIPC Contest 2 P3 - Snowy Streets Uncategorized 5p 29.4% 55
MCIPC Contest 2 P4 - Wreath Uncategorized 7p 10.4% 9
MCIPC Contest 2 P5 - Holiday Chocolates Uncategorized 10p 26.0% 7
MCIPC Contest 2 P6 - Block Tower Uncategorized 12p 11.6% 9
MEC '16 P1 - Bat-Doctor Seasonal 5p 25.5% 41
MEC '16 P2 - Conveyor Belt Seasonal 5p 20.8% 55
MEC '16 P3 - Getting Good at Programming Seasonal 10p 29.7% 314
MEC '16 P4 - Circuitry Seasonal 15p 16.2% 21
MEC '16 P6 - Instruments of the Ghostwriters Seasonal 10p 11.3% 15
Median Modulo Uncategorized 15p 7.3% 7
Meta Classics 12p 34.1% 12
Mice and Maze Uncategorized 7 55.6% 3
Miniature Sudoku Uncategorized 7 30.7% 22
Miracle Sort Seasonal 3 25.0% 393
Maximum Independent Subset Uncategorized 15p 12.6% 10
Multiplication Improvement Uncategorized 5 50.5% 240
MMCC '14 P1 - Tenri Uncategorized 17p 23.2% 72
MMCC '14 P2 - Kirito Uncategorized 20p 26.1% 154
MMCC '14 P3 - Esdeath Uncategorized 15p 14.9% 208
MMCC '15 P1 - Inaho Uncategorized 15p 17.8% 243
MMCC '15 P2 - Akame Uncategorized 25p 15.5% 46
MMCC '15 P3 - Momoka Uncategorized 25p 10.9% 9
MMM '14 A - Distinct Prime Factors Uncategorized 7 26.9% 246