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Problem Category Points AC % ▾ Users
New Year's '17 P1 - Mr. N and Presents Seasonal 7p 18.5% 273
Mock CCC '19 Contest 1 J3 - Pusheen Eats Tuna Sashimi and Tuna Nigiri Mock CCC 3p 18.4% 338
IOI '00 P1 - Palindrome IOI 10p 18.4% 815
Fixing Shirts Uncategorized 15 18.4% 24
Mynerva Olympiads School 7p 18.4% 79
Valentine's Day '19 J4 - Flowers Uncategorized 5 18.4% 67
DMPG '15 G2 - 1-String B2-VPG Representation of Planar Graphs DMOPC 15p 18.4% 30
Inaho III Uncategorized 17p 18.4% 31
IOI '13 P1 - Dreaming (Standard I/O) IOI 15p 18.4% 517
RGPC '18 P4 - Higgs Uncategorized 15p 18.4% 40
SAC '22 Code Challenge 4 Junior P4 - Obligatory Permutation Problem SAC Coding Challenge 7p 18.4% 83
Mock CCC '15 S1 - Dupvoting Mock CCC 5p 18.4% 151
Mock CCC '15 S3 - The Tachyon Trap Mock CCC 12p 18.4% 65
Sales Uncategorized 20p 18.4% 64
Mock CCC '22 Contest 2 J4 - Hockey Bracket Mock CCC 7p 18.4% 194
COCI '15 Contest 4 #5 Galaksija COCI 15p 18.3% 113
COCI '23 Contest 2 #3 Dizalo COCI 17p 18.3% 15
An Animal Contest 3 P5 - Monkey Canoe AAC 12p 18.3% 133
Mock CCO '18 Contest 2 Problem 6 - Victor's Cubes Mock CCO 20p 18.3% 9
DMOPC '18 Contest 2 P2 - Booster Cushions DMOPC 5p 18.3% 188
Waterloo 2022 Fall E - Water Flow Waterloo Local 12 18.3% 7
DMOPC '18 Contest 5 P3 - A Familiar Problem DMOPC 7p 18.3% 425
CCO '08 P5 - Candy CCO 7p 18.3% 235
CEOI '17 P6 - Chase CEOI 30p 18.3% 21
CCOQR '16 - Through A Maze Darkly CCC 20p 18.3% 103
IOI '13 P5 - Robots IOI 20p 18.3% 90
Mock CCC '21 S5 - Clique and Independent Set Mock CCC 25p 18.3% 11
COCI '10 Contest 4 #4 Prosjek COCI 7p 18.3% 14
Factorial Calculator TLE 7p 18.3% 79
CCC '11 S5 - Switch CCC 12p 18.3% 411
DMPG '15 B4 - Maximum Product DMOPC 7p 18.3% 321
Mock CCC '15 J4 - Vox in Box Mock CCC 7p 18.3% 78
COCI '18 Contest 5 #4 Parametriziran COCI 15p 18.3% 34
CCC '22 S3 - Good Samples CCC 10p 18.3% 651
NOI '15 P1 - Automated Program Analyzer China NOI 12p 18.3% 95
Mock CCC '18 Contest 5 S4 - Sparse Binary String Counting Mock CCC 10p 18.3% 92
IOI '11 P3 - Rice Hub IOI 15p 18.2% 125
DMOPC '17 Contest 3 P2 - Towers of Hanoi DMOPC 7p 18.2% 82
APIO '14 P1 - Palindromes APIO 25p 18.2% 58
DMOPC '20 Contest 5 P2 - On The Clock DMOPC 7p 18.2% 247
CCC '24 S3 - Swipe CCC 10p 18.2% 160
Bubble Cup V8 B Bribes Bubble Cup 17 18.2% 53
CCC '10 S3 - Firehose CCC 15p 18.2% 644
IOI '10 P6 - Traffic Congestion IOI 10p 18.2% 94
The Cosmic Era P4 - Freedom Appears! Uncategorized 7 18.2% 143
COCI '15 Contest 7 #5 Prosti COCI 15 18.2% 11
JOI '20 Spring Camp Day 1 P3 - Sweeping JOI 25p 18.2% 2
A Math Contest P16 - Morbius vs. Suibom Uncategorized 25 18.2% 20
IOI '14 P5 - Friend (Standard I/O) IOI 30p 18.2% 188
TLE '16 Contest 6 (Mock CCC) J2 - Carol's Flowers TLE 3p 18.2% 97