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Problem Category Points AC % Users ▾
CBOJ Winter Contest Problem 2 - Suitcase Packing (Hard) CBOJ 10 21.6% 7
CBOJ Exec Selection Contest Problem 1 - Networking CBOJ 12p 25.9% 7
CBOJ Exec Selection Contest 2 Problem 2 - Patryk and Primes Club 5 26.2% 7
Iceberg Hopping Club 10p 14.7% 6
Point of Intersection Club 10p 13.4% 6
A Difference Array Problem Club 7p 36.4% 6
CBOJ Fall Contest Problem 3 - Maximum Social Distance CBOJ 12p 11.6% 6
Perfectly Even Numbers (Extreme) Club 15 12.1% 6
CCC '19 J5 - Rule of Three CCC 15p 40.0% 6
CCC '03 S5 - Trucking Troubles CCC 15p 60.0% 6
CBOJ Winter Contest Problem 4 - Paint.NET CBOJ 12p 14.8% 6
CCC '21 S3 - Lunch Concert CCC 10p 38.9% 6
ECOO 2018 R2 P3 - Factorial ECOO 12 40.9% 6
Making a Necklace Club 10p 31.4% 6
A Fenwick Tree Problem Club 15p 17.9% 6
CBOJ 2022 Welcome Contest Problem 4 - Highest Weight Path Club 7p 16.4% 6
The Perfect Gift CBOJ 7p 28.6% 6
CBOJ Fall Challenge '24 P2 - Collatz Conjecture CBOJ 5 70.0% 6
CCC '21 S4 - Daily Commute CCC 12p 24.0% 5
ECOO 2015 R1 P4 - Neanderthal Numbers ECOO 12 68.4% 5
CBOJ Exec Selection Contest Problem 3 - Lucky Modulo 7 CBOJ 15p 16.3% 5
CBOJ 2022 Spring Contest Problem 2 - Allen's Asparagus CBOJ 5 14.3% 5
CBOJ Exec Selection Contest 2 Problem 3 - Anita's Array Club 7 20.7% 5
CB Open 2024 Problem 1 - Studying for CS146 CBOJ 7 88.9% 5
CB Open 2024 Problem 2 - Nikola and the Teslas CBOJ 7 53.8% 5
WAC - Squirrel Election WAC 7p 15.8% 4
Palindrome 3 - Longest Palindrome (Hard) CBOJ 15 8.9% 4
Subarray Sums CBOJ 7p 9.4% 4
CBOJ Welcome Contest Problem 4 - Remainder Table CBOJ 15p 5.1% 4
CBOJ Fall Contest Problem 4 - Taking an L CBOJ 12p 23.4% 4
CCC '19 S3 - Arithmetic Square CCC 15p 6.6% 4
ECOO 2016 R2 P1 - Palindrome Panic ECOO 12 34.4% 4
CBOJ Exec Selection Contest Problem 2 - Pretty Sequence CBOJ 15p 5.8% 4
CBOJ Exec Selection Contest Problem 4 - Bob and Books CBOJ 15p 11.0% 4
CBOJ 2022 Spring Contest Problem 4 - Allen's Automata CBOJ 15p 10.1% 4
CBOJ 2022 Spring Contest Problem 3 - Martin's Monochromatic Marbles CBOJ 7p 22.2% 4
CB Open 2024 Problem 4 - A Perfect Contest CBOJ 10 25.0% 4
CBOJ 2023 Welcome Contest Problem 4 - A Dream Problem CBOJ 10 16.4% 4
Numbers On A Whiteboard CBOJ 10 19.2% 4
CB Open 2024 Problem 3 - Another Number Theory Problem CBOJ 7 26.0% 4
CBOJ Fall Challenge '24 P3 - Domino Tiling CBOJ 7 46.2% 4
Count Divisors (Extreme) CBOJ 15 3.5% 3
CCC '21 S5 - Math Homework CCC 12p 44.4% 3
CBOJ Exec Selection Contest Problem 5 - Interesting Words CBOJ 15p 19.8% 3
Zeyu and Fireworks CBOJ 12p 18.2% 3
Santa's Route CBOJ 10 17.2% 3
CBOJ Exec Selection Contest 2 Problem 4 - George's Graph Club 10 40.0% 3
CBOJ Exec Selection Contest 2 Problem 5 - Obligatory Data Structure Problem Club 12 10.0% 3
CB Open 2024 Problem 5 - Stopping Rumours CBOJ 10 33.3% 3
CBOJ Fall Challenge '24 P4 - Factor Graph CBOJ 7 12.5% 3