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Problem Category Points AC % ▾ Users
IOI '94 P2 - The Castle IOI 10 18.8% 127
TLE '17 Contest 4 P6 - Fax's Christmas Bash TLE 25p 18.8% 38
CCC '06 S5 - Origin of Life CCC 15 18.8% 117
Yet Another Contest 1 P4 - No More Searching YAC 12p 18.8% 49
NOI '06 P6 - The Magical Bag China NOI 20p 18.8% 11
COCI '20 Contest 1 #5 Tenis COCI 17p 18.8% 7
DMOPC '15 Contest 1 P6 - Lelei and Contest DMOPC 17p 18.7% 391
COCI '15 Contest 3 #5 Nekameleoni COCI 20p 18.7% 66
CCC '99 S4 - A Knightly Pursuit CCC 12 18.7% 348
DMPG '15 G3 - Kinako Bread 2 DMOPC 30p 18.7% 69
CCC '15 S3 - Gates CCC 10p 18.7% 1775
DMOPC '14 Contest 1 P6 - Biology Homework DMOPC 17p 18.7% 33
Baltic OI '01 P1 - Postman Baltic OI 10p 18.7% 25
Another Contest 5 Problem 2 - Great Graffiti ACC 5p 18.7% 216
DMOPC '17 Contest 5 P5 - XOR Bridges DMOPC 15p 18.7% 52
Inaho V Uncategorized 3p 18.7% 208
DMOPC '18 Contest 1 P6 - Sorting DMOPC 20p 18.7% 30
Still Too Simple Seasonal 10 18.7% 43
IOI '13 P4 - Cave IOI 10p 18.6% 311
DMOPC '14 Contest 3 P4 - Not Enough Testers! DMOPC 10p 18.6% 416
DMOPC '19 Contest 7 P2 - Dinner Party DMOPC 10 18.6% 143
HCI '16 - Hearing Uncategorized 15p 18.6% 5
JOI '21 Spring Camp Day 3 P3 - Meetings 2 JOI 30p 18.6% 8
City Travel Olympiads School 15p 18.6% 21
VMSS Pre-Windsor P4 - Character Analysis Uncategorized 5 18.6% 102
DMPG '17 B4 - Bad Sort DMOPC 7 18.6% 71
CCO '13 P1 - All Your Base Belong to Palindromes CCO 10p 18.6% 208
IOI '15 P5 - Sorting (Standard I/O) IOI 25p 18.6% 186
WC '16 Contest 3 J1 - The Elite N Woburn Challenge 7p 18.6% 33
COCI '21 Contest 4 #2 Autobus COCI 10p 18.6% 73
Mock CCC '19 Contest 1 J3 - Pusheen Eats Tuna Sashimi and Tuna Nigiri Mock CCC 3p 18.6% 351
CCO '22 P2 - Rainy Markets CCO 17p 18.6% 104
CEOI '16 P5 - Popeala CEOI 25p 18.6% 11
COCI '11 Contest 4 #2 Zima COCI 7p 18.6% 12
DMOPC '19 Contest 7 P6 - Bob Equilibrium DMOPC 30p 18.6% 51
COCI '20 Contest 4 #2 Vepar COCI 10p 18.6% 84
IOI '13 P1 - Dreaming (Standard I/O) IOI 15p 18.6% 529
DMOPC '16 Contest 4 P2 - Systests DMOPC 7p 18.6% 382
CCO '15 P6 - Eggscavation CCO 30p 18.5% 70
COCI '11 Contest 4 #3 Keks COCI 7p 18.5% 34
WC '15 Contest 2 S3 - Revenge of the Sith Woburn Challenge 15p 18.5% 33
COCI '06 Contest 5 #3 Tenis COCI 10p 18.5% 74
WC '99 P2 - Mission Impossible Woburn Challenge 7 18.5% 56
DMOPC '18 Contest 4 P5 - Dr. Henri and Wormholes DMOPC 25p 18.5% 53
DMOPC '22 Contest 4 P2 - Fake Painting DMOPC 10p 18.5% 89
TLE '17 Contest 5 P6 - Circuits TLE 20p 18.5% 19
ECOO '17 R3 P4 - Ice Cream Beach ECOO 15p 18.5% 36
IOI '00 P1 - Palindrome IOI 10p 18.5% 827
NOI '15 P1 - Automated Program Analyzer China NOI 12p 18.5% 97
IOI '11 P2 - Race IOI 17p 18.5% 207