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Problem Category Points ▾ AC % Users
CCO '02 P5 - Connect The Campus CCO 12 31.0% 101
CCO '02 P6 - Pit Stop Strategy CCO 12 52.7% 9
IOI '05 P2 - Mean Sequence IOI 12p 20.9% 270
IOI '05 P4 - Birthday IOI 12p 15.7% 141
COCI '09 Contest 1 #5 Genijalac COCI 12p 39.9% 48
CEOI '19 Practice P3 - Tower Defense CEOI 12p 13.9% 25
OCC '19 S5 - Partitioning Olympiads School 12p 8.2% 12
DMOPC '19 Contest 1 P3 - Simple Math DMOPC 12 18.0% 41
Baltic OI '06 P2 - Coin Collector Baltic OI 12 19.0% 24
DMOPC '19 Contest 2 P3 - Selection DMOPC 12 38.7% 163
Baltic OI '13 P5 - Tracks in the Snow Baltic OI 12p 29.6% 84
DMOPC '19 Contest 3 P3 - Majority DMOPC 12p 48.3% 268
Icebergs Uncategorized 12p 20.4% 47
A Permutation Problem 2 Uncategorized 12 30.7% 20
A Sum Problem Olympiads School 12p 13.0% 76
GlobeX Cup '19 S3 - Ninjaclasher's Wrath Uncategorized 12p 12.2% 19
Athena on Zanzibar Island Olympiads School 12p 6.7% 31
VPEX P3 - Coding Club Uncategorized 12p 4.7% 25
DMOPC '19 Contest 4 P3 - Taking Cues DMOPC 12p 20.0% 77
Art Academy V: Ruin Uncategorized 12p 25.1% 46
Wesley's Anger Contest 3 Problem 4 - Canadian Construction Crew WAC 12p 20.4% 81
Mock CCC '20 Contest 1 J5 - A Prime Problem Mock CCC 12p 2.8% 20
Art Academy VI: The Last Stand Uncategorized 12p 23.0% 27
CCC '20 J4 - Cyclic Shifts (Hard) CCC 12p 3.8% 36
DMOPC '19 Contest 5 P3 - Captivating Construction Challenge DMOPC 12p 44.9% 120
DMOPC '19 Contest 7 P3 - Tree Pruning DMOPC 12p 21.3% 137
COCI '19 Contest 2 #3 Checker COCI 12p 28.7% 26
CCC '20 S3 - Searching for Strings CCC 12p 8.9% 840
CCC '20 S4 - Swapping Seats CCC 12p 25.6% 489
ECOO '19 R3 P2 - Array Game ECOO 12p 21.6% 5
COCI '19 Contest 4 #5 Nivelle COCI 12p 44.4% 59
COCI '19 Contest 1 #5 Zoo COCI 12p 31.5% 38
Wesley's Anger Contest 5 Problem 3 - Super Squirrel Sisters WAC 12p 19.6% 113
Wesley's Anger Contest 4 Problem 3 - Squirrel Tag WAC 12p 15.5% 73
QCC P5 - Vaccine Delivery Uncategorized 12 16.2% 25
Art Academy VII: A Mysterious Object Uncategorized 12p 41.3% 62
COCI '06 Contest 5 #4 Liga COCI 12p 13.6% 43
ECOO '20 P4 - Ring ECOO 12p 17.3% 79
Fast LCA Uncategorized 12 22.8% 48
Evan's Cube Uncategorized 12p 31.7% 8
Tootsie Rolls Classics 12p 22.2% 10
CCO '04 P2 - Hockey Scores CCO 12 20.6% 66
CCO '04 P4 - Return of Space Turtle CCO 12 14.2% 46
COCI '15 Contest 7 #4 Otpor COCI 12 69.2% 30
WC '18 Contest 1 S3 - Reach for the Top Woburn Challenge 12p 11.7% 118
IOI '09 P2 - Hiring IOI 12p 32.3% 251
NOI '97 P6 - Satellite Coverage China NOI 12p 39.5% 27
NOI '14 P5 - Random Number Generator China NOI 12p 24.3% 52
NOI '98 P5 - SERNET Simulation China NOI 12p 8.5% 14
NOI '00 P2 - Program Parser China NOI 12p 11.5% 10