Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users
WOSS Dual Olympiad 2022 J3/S1: Christmas List Seasonal 5p 58.7% 149
WOSS Dual Olympiad 2022 J4: Fire on Christmas Day Seasonal 7p 13.7% 34
WOSS Dual Olympiad 2022 S2: Festive Card Game Seasonal 7p 20.4% 58
WOSS Dual Olympiad 2022 S3: Sightseeing in the North Pole Seasonal 12 16.4% 22
WOSS Dual Olympiad 2022 Team Round P1: Bobby and His Calculus Test Seasonal 3p 64.9% 63
WOSS Dual Olympiad 2022 Team Round P2: Bobby's Studying Schedule Seasonal 5 62.4% 47
WOSS Dual Olympiad 2022 Team Round P3: Bobby and the Sidewalk Seasonal 10p 27.0% 35
William and Summation Uncategorized 7p 28.8% 56
A Very Coordinated Christmas Uncategorized 7p 34.7% 114
XOR Uncategorized 7 41.3% 332
XOR Minimum Uncategorized 17p 36.0% 133
XOR Sum Uncategorized 10 44.8% 223
James' XOR Update Uncategorized 12p 28.2% 31
Crosswords Uncategorized 15p 16.0% 4
Yet Another Contest 1 P1 - Mixed Doubles YAC 7p 16.8% 217
Yet Another Contest 1 P2 - A Boring Problem YAC 10p 12.4% 75
Yet Another Contest 1 P3 - Fluke YAC 10p 15.8% 86
Yet Another Contest 1 P4 - No More Searching YAC 12p 18.8% 49
Yet Another Contest 1 P5 - Hopping Kangaroos YAC 17p 12.2% 17
Yet Another Contest 1 P6 - Alchemy YAC 20p 15.7% 13
Yet Another Contest 2 P1 - Betting YAC 5p 21.8% 241
Yet Another Contest 2 P2 - Secret Sequence YAC 7p 25.7% 129
Yet Another Contest 2 P3 - Maximum Damage YAC 10p 7.9% 62
Yet Another Contest 2 P4 - No More Arithmetic YAC 15p 15.1% 51
Yet Another Contest 2 P5 - Mirror Maze YAC 17p 30.1% 44
Yet Another Contest 2 P6 - Travel Budget YAC 20p 15.0% 37
Yet Another Contest 3 P1 - Shell Swap Scam YAC 5p 24.0% 171
Yet Another Contest 3 P2 - Work Experience YAC 10p 20.9% 66
Yet Another Contest 3 P3 - Topology YAC 15p 2.4% 17
Yet Another Contest 3 P4 - Rumour YAC 15p 25.9% 65
Yet Another Contest 3 P5 - No More Thieves YAC 25p 12.6% 7
Yet Another Contest 4 P1 - Snap YAC 5p 46.9% 258
Yet Another Contest 4 P2 - Alchemy 2 YAC 7p 26.1% 161
Yet Another Contest 4 P3 - Canadian Cactus Competition YAC 12p 9.9% 51
Yet Another Contest 4 P4 - Even The Odds YAC 20p 3.8% 11
Yet Another Contest 4 P5 - Signpost YAC 20p 19.5% 25
Yet Another Contest 4 P6 - No More Solitaire YAC 20p 6.6% 23
Yet Another Contest 5 P1 - Number Pyramid YAC 7p 18.6% 175
Yet Another Contest 5 P2 - Big Score YAC 10p 12.8% 91
Yet Another Contest 5 P3 - Potted Plants YAC 12p 15.8% 61
Yet Another Contest 5 P4 - Nils++ YAC 17p 2.3% 6
Yet Another Contest 5 P5 - No More Concerts YAC 20p 10.7% 10
Yet Another Contest 6 P1 - No More Separation YAC 5p 32.1% 301
Yet Another Contest 6 P2 - No More Telemarketers YAC 7p 16.5% 126
Yet Another Contest 6 P3 - No More Cell Phone Messaging YAC 10p 13.1% 96
Yet Another Contest 6 P4 - No More Nails! YAC 12p 10.6% 50
Yet Another Contest 6 P5 - No More Coyotes YAC 15p 22.5% 25
Yet Another Contest 6 P6 - No More Snakes and Ladders YAC 17p 17.7% 21
Yet Another Contest 7 P1 - Page Turning YAC 5p 20.1% 258
Yet Another Contest 7 P2 - Coprime Grid YAC 10p 21.8% 184