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Problem Category Points AC % ▴ Users
IOI '15 P3 - Teams (Standard I/O) IOI 35p 3.4% 37
NOI '16 P3 - The Beauty of Cycles China NOI 30p 3.4% 1
IOI '23 P6 - Robot Contest IOI 40p 3.4% 2
Calendar Contest Problem 6 — Ming Dynasty Seasonal 25 3.5% 2
IOIQR P5 - Some Game Seasonal 25 3.5% 3
OCC '19 G4 - Willson and Fighting Olympiads School 30p 3.5% 3
IOI '11 P6 - Parrots IOI 20p 3.6% 16
WC '15 Contest 3 S4 - Lex Luthor's Landmines Woburn Challenge 30p 3.6% 6
Valentine's Day '15 P1 - #1 BABE Seasonal 15p 3.6% 2
DMOPC '21 Contest 10 P4 - Bitwise Telephone DMOPC 17p 3.7% 30
CCO Preparation Test 2 P2 - Forest Area Mock CCO 25p 3.8% 5
Cheerio Contest 3 P5 - Train Network Uncategorized 20p 3.8% 15
CCC '20 J4 - Cyclic Shifts (Hard) CCC 12p 3.8% 34
Yet Another Contest 4 P4 - Even The Odds YAC 20p 3.8% 11
TLE '16 Contest 6 (Mock CCC) S5 - Toll Routes TLE 20p 3.9% 26
Mock CCC '15 S5 - Kongou Mock CCC 40p 3.9% 13
Mock CCC '23 2 S3 - Richard The Penguin Mock CCC 10p 3.9% 13
CCO '06 P5 - Domino CCO 30 3.9% 3
Baltic OI '18 P3 - Worm Worries Baltic OI 30p 4.0% 5
CCC '00 S5 - Sheep and Coyotes CCC 10p 4.0% 167
COCI '16 Contest 7 #5 Paralelogrami COCI 17p 4.0% 2
EGOI '23 P8 - Guessing Game EGOI 50p 4.0% 7
Maximum Deviation Spanning Tree Olympiads School 20p 4.0% 4
NOI '02 P5 - New Tetris China NOI 15p 4.1% 3
COI '19 #2 Pastiri COCI 35p 4.1% 4
Triway Cup '19 Summer D - Napping Seasonal 15p 4.1% 6
COI '17 #4 Zagonetka COCI 17p 4.1% 2
COCI '22 Contest 5 #5 Zastave COCI 17p 4.1% 20
ETSR '23 Onsite Round 2 Problem 2 - Exponents Uncategorized 25p 4.1% 13
Another Contest 1 Problem 3 - Poutine ACC 10 4.1% 57
CCC '00 S5 - Sheep and Coyotes (Hard) CCC 20 4.1% 18
Bubble Cup V8 G Run for beer Bubble Cup 20 4.1% 17
HCI '16 - Computation Uncategorized 0 4.2% 3
The Contest Contest 1 P5 - A Typical CCO Problem Uncategorized 20p 4.2% 24
DMOPC '18 Contest 4 P6 - Dr. Henri and Resistor Chains DMOPC 20p 4.2% 10
ETSR '23 Onsite Round 1 Problem 1 - Arithmetic Uncategorized 20p 4.3% 16
CCO '99 P5 - Sum Of Products CCO 15 4.3% 1
Mock CCO '19 Contest 2 Problem 5 - A Geometry Problem Mock CCO 12p 4.3% 2
Root Solver Uncategorized 30p 4.4% 9
MNYC '17: Skiing Competition Seasonal 15p 4.4% 7
ETSR '23 Online Round 2 Problem 2 - Equation Uncategorized 15p 4.4% 35
SMAC 08/09 (Oct) #4 - Daycare Uncategorized 15p 4.5% 20
Waterloo 2023 Winter E - Colourful Tree Waterloo Local 25 4.5% 4
DMOPC '21 Contest 4 P6 - Balanced Line DMOPC 35p 4.5% 4
CCO '04 P3 - S and K CCO 15p 4.5% 6
Waterloo 2023 Fall E - Loose Goose Waterloo Local 25 4.5% 1
IOI '23 P1 - Closing Time IOI 25p 4.6% 20
COCI '21 Contest 3 #3 Akcija COCI 30p 4.6% 8
IOI '23 P3 - Soccer Stadium IOI 30p 4.7% 12
CCO '21 P6 - Loop Town CCO 50p 4.7% 13