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Problem Category Points AC % Users
CCC '19 S3 - Arithmetic Square CCC 15p 6.6% 4
CCC '20 S2 - Escape Room CCC 12p 12.0% 9
CCC '20 S3 - Searching for Strings CCC 15p 17.9% 8
CCC '20 S3 Easy - Searching for Strings CCC 12p 68.2% 10
CCC '21 S1 - Crazy Fencing CCC 5 46.6% 16
CCC '21 S2 - Modern Art CCC 7p 23.0% 10
CCC '21 S3 - Lunch Concert CCC 10p 50.0% 6
CCC '21 S4 - Daily Commute CCC 12p 24.0% 5
CCC '21 S5 - Math Homework CCC 12p 44.4% 3
A CCC Preparation Problem CBOJ 1 33.8% 16
Subarray Sums CBOJ 7p 8.6% 4
ECOO 2015 R1 P4 - Neanderthal Numbers ECOO 12 66.7% 6
ECOO 2016 R2 P1 - Palindrome Panic ECOO 12 34.4% 4
ECOO 2018 R2 P3 - Factorial ECOO 12 40.9% 6
Count Divisors Club 5 24.8% 14
Count Divisors (Extreme) CBOJ 15 3.4% 3
CBOJ Fall Challenge '24 P1 - Building Squares CBOJ 3 53.8% 6
CBOJ Fall Challenge '24 P2 - Collatz Conjecture CBOJ 5 70.0% 6
CBOJ Fall Challenge '24 P3 - Domino Tiling CBOJ 7 46.2% 4
CBOJ Fall Challenge '24 P4 - Factor Graph CBOJ 7 12.5% 3
A Fenwick Tree Problem Club 15p 17.6% 7
Graph Theory: Intro Club 5 27.1% 12
Graph Theory: Connectivity Club 10 32.9% 14
Graph Theory: Shortest Path Club 10 41.7% 11
Graph Theory: Weighted Graph Club 12 17.4% 8
Hello, World! CBOJ 1 39.1% 45
Days To Break CBOJ 3 76.5% 12
Menorah CBOJ 5 45.0% 9
Snow Removal CBOJ 5 22.0% 8
Santa's Route CBOJ 10 17.2% 3
The Perfect Gift CBOJ 7p 28.6% 6
Placing Kings Club 10p 64.0% 11
Mountain, Valley And Repeat CBOJ 17 30.6% 2
Making a Necklace Club 10p 31.4% 6
Numbers On A Whiteboard CBOJ 10 16.0% 3
CB Open 2024 Problem 1 - Studying for CS146 CBOJ 7 77.8% 4
CB Open 2024 Problem 2 - Nikola and the Teslas CBOJ 7 50.0% 5
CB Open 2024 Problem 3 - Another Number Theory Problem CBOJ 7 27.5% 5
CB Open 2024 Problem 4 - A Perfect Contest CBOJ 10 30.0% 4
CB Open 2024 Problem 5 - Stopping Rumours CBOJ 10 31.6% 3
Palindrome 1 - Check Palindrome CBOJ 3 32.9% 20
Palindrome 2 - Longest Palindrome (Easy) CBOJ 7 25.7% 31
Palindrome 3 - Longest Palindrome (Hard) CBOJ 15 15.8% 4
Public Service Announcement Club 7p 37.3% 13
A Difference Array Problem Club 7p 30.8% 7
Fibonacci 1 Club 5 73.6% 18
Fibonacci 2 Club 7 29.0% 13
Perfectly Even Numbers Club 5 20.3% 11
Perfectly Even Numbers (Extreme) Club 15 13.3% 6
Supply Drop CBOJ 20p 17.4% 1