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Problem Category Points AC % ▴ Users
A Prime Problem Club 12 1.2% 2
A Dynamic Programming Problem Club 20 3.1% 2
WAC - The Almighty Acorn WAC 35p 3.2% 1
Count Divisors (Extreme) CBOJ 15 3.5% 3
CBOJ Welcome Contest Problem 4 - Remainder Table CBOJ 15p 5.1% 4
CBOJ Exec Selection Contest Problem 2 - Pretty Sequence CBOJ 15p 5.8% 4
CCC '19 S3 - Arithmetic Square CCC 15p 6.6% 4
Palindrome 3 - Longest Palindrome (Hard) CBOJ 15 8.9% 4
Subarray Sums CBOJ 7p 9.4% 4
CBOJ Exec Selection Contest 2 Problem 5 - Obligatory Data Structure Problem Club 12 10.0% 3
CBOJ 2022 Spring Contest Problem 4 - Allen's Automata CBOJ 15p 10.1% 4
CBOJ Exec Selection Contest Problem 4 - Bob and Books CBOJ 15p 11.0% 4
CBOJ Fall Contest Problem 3 - Maximum Social Distance CBOJ 12p 11.6% 6
CCC '20 S2 - Escape Room CCC 12p 12.1% 9
Perfectly Even Numbers (Extreme) Club 15 12.1% 6
CBOJ Fall Challenge '24 P4 - Factor Graph CBOJ 7 12.5% 3
Point of Intersection Club 10p 13.4% 6
CBOJ 2022 Spring Contest Problem 2 - Allen's Asparagus CBOJ 5 14.3% 5
Iceberg Hopping Club 10p 14.7% 6
CBOJ Winter Contest Problem 4 - Paint.NET CBOJ 12p 14.8% 6
CCC '20 S3 - Searching for Strings CCC 15p 15.5% 8
WAC - Squirrel Election WAC 7p 15.8% 4
CBOJ Exec Selection Contest Problem 3 - Lucky Modulo 7 CBOJ 15p 16.3% 5
CBOJ 2022 Welcome Contest Problem 4 - Highest Weight Path Club 7p 16.4% 6
CBOJ 2023 Welcome Contest Problem 4 - A Dream Problem CBOJ 10 16.4% 4
Graph Theory: Weighted Graph Club 12 16.5% 7
Zeyu and Prefixes CBOJ 5 16.5% 10
A Binary Search Problem Club 7 17.2% 8
Santa's Route CBOJ 10 17.2% 3
Supply Drop CBOJ 20p 17.4% 1
A Fenwick Tree Problem Club 15p 17.9% 6
CBOJ Welcome Contest Problem 3 - Octomesters CBOJ 7p 18.1% 36
CBOJ Exec Selection Contest Problem 6 - Cult CBOJ 17p 18.2% 2
Zeyu and Fireworks CBOJ 12p 18.2% 3
CBOJ Welcome Contest Problem 1 - Symmetric Encryption CBOJ 5p 18.8% 11
Numbers On A Whiteboard CBOJ 10 19.2% 4
CBOJ Winter Contest Problem 2 - Suitcase Packing CBOJ 7p 19.3% 8
CBOJ Exec Selection Contest Problem 5 - Interesting Words CBOJ 15p 19.8% 3
CBOJ Exec Selection Contest 2 Problem 3 - Anita's Array Club 7 20.7% 5
CBOJ Winter Contest Problem 2 - Suitcase Packing (Hard) CBOJ 10 21.6% 7
Perfectly Even Numbers Club 5 21.8% 11
Snow Removal CBOJ 5 22.0% 8
CBOJ 2022 Spring Contest Problem 3 - Martin's Monochromatic Marbles CBOJ 7p 22.2% 4
A Sum Problem Club 5 22.7% 19
CBOJ Fall Contest Problem 2 - Raking Leaves CBOJ 7p 23.2% 12
CBOJ Fall Contest Problem 4 - Taking an L CBOJ 12p 23.4% 4
CCC '21 S4 - Daily Commute CCC 12p 24.0% 5
CCC '21 S2 - Modern Art CCC 7p 24.2% 9
CB Open 2024 Problem 4 - A Perfect Contest CBOJ 10 25.0% 4
A Math Problem (Easy) Club 7 25.2% 36