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Problem Category Points AC % Users
CCC '19 S3 - Arithmetic Square CCC 15p 7.4% 4
CCC '20 S2 - Escape Room CCC 12p 14.1% 14
CCC '20 S3 - Searching for Strings CCC 15p 16.0% 12
CCC '20 S3 Easy - Searching for Strings CCC 12p 64.2% 14
CCC '21 S1 - Crazy Fencing CCC 5 45.8% 25
CCC '21 S2 - Modern Art CCC 7p 31.7% 13
CCC '21 S3 - Lunch Concert CCC 10p 52.6% 9
CCC '21 S4 - Daily Commute CCC 12p 21.9% 6
CCC '21 S5 - Math Homework CCC 12p 42.3% 8
A CCC Preparation Problem CBOJ 1 31.8% 19
Subarray Sums CBOJ 7p 9.4% 8
ECOO 2015 R1 P4 - Neanderthal Numbers ECOO 12 68.2% 7
ECOO 2016 R2 P1 - Palindrome Panic ECOO 12 73.3% 4
ECOO 2018 R2 P3 - Factorial ECOO 12 36.8% 5
Count Divisors Club 5 25.4% 23
Count Divisors (Extreme) CBOJ 15 7.4% 7
A Fenwick Tree Problem Club 15p 14.7% 8
Graph Theory: Intro Club 5 45.5% 19
Graph Theory: Connectivity Club 10 33.9% 19
Graph Theory: Shortest Path Club 10 36.9% 19
Graph Theory: Weighted Graph Club 12 17.3% 10
Hello, World! CBOJ 1 9.6% 69
Days To Break CBOJ 3 80.0% 15
Menorah CBOJ 5 50.0% 12
Snow Removal CBOJ 5 22.7% 8
Santa's Route CBOJ 10 15.6% 3
The Perfect Gift CBOJ 7p 26.7% 6
Placing Kings Club 10p 61.9% 12
Mountain, Valley And Repeat CBOJ 17 37.9% 2
Making a Necklace Club 10p 28.6% 7
Numbers On A Whiteboard CBOJ 10 15.4% 3
CB Open 2024 Problem 1 - Studying for CS146 CBOJ 7 80.0% 5
CB Open 2024 Problem 2 - Nikola and the Teslas CBOJ 7 53.8% 5
CB Open 2024 Problem 3 - Another Number Theory Problem CBOJ 7 25.9% 5
CB Open 2024 Problem 4 - A Perfect Contest CBOJ 10 32.3% 5
CB Open 2024 Problem 5 - Stopping Rumours CBOJ 10 19.4% 3
Palindrome 1 - Check Palindrome CBOJ 3 36.8% 31
Palindrome 2 - Longest Palindrome (Easy) CBOJ 7 26.7% 35
Palindrome 3 - Longest Palindrome (Hard) CBOJ 15 17.3% 5
Public Service Announcement Club 7p 38.1% 17
A Difference Array Problem Club 7p 37.0% 9
Fibonacci 1 Club 5 51.4% 28
Fibonacci 2 Club 7 25.7% 19
Perfectly Even Numbers Club 5 22.6% 15
Perfectly Even Numbers (Extreme) Club 15 14.9% 9
Supply Drop CBOJ 20p 19.2% 1
WAC - The Almighty Acorn WAC 35p 11.4% 2
WAC - Snow Day Predictor WAC 3 53.2% 21
WAC - Squirrel Election WAC 7p 14.7% 8
WAC - Triangle: The Root of All Evil WAC 15p 71.4% 3