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Problem Category Points AC % Users
CCC '19 S3 - Arithmetic Square CCC 15p 6.9% 5
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 45.9% 26
CCC '21 S2 - Modern Art CCC 7p 26.0% 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 33.7% 20
Subarray Sums CBOJ 7p 8.7% 8
ECOO 2015 R1 P4 - Neanderthal Numbers ECOO 12 68.2% 7
ECOO 2016 R2 P1 - Palindrome Panic ECOO 12 36.7% 4
ECOO 2018 R2 P3 - Factorial ECOO 12 40.9% 6
Count Divisors Club 5 25.1% 23
Count Divisors (Extreme) CBOJ 15 6.5% 7
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 13.8% 8
Graph Theory: Intro Club 5 36.1% 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 9.7% 71
Days To Break CBOJ 3 77.3% 16
Menorah CBOJ 5 50.0% 12
Snow Removal CBOJ 5 21.4% 9
Santa's Route CBOJ 10 15.6% 3
The Perfect Gift CBOJ 7p 26.7% 6
Placing Kings Club 10p 60.2% 13
Mountain, Valley And Repeat CBOJ 17 30.6% 2
Making a Necklace Club 10p 26.1% 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 53.3% 6
CB Open 2024 Problem 3 - Another Number Theory Problem CBOJ 7 26.3% 6
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 26.6% 35
Palindrome 3 - Longest Palindrome (Hard) CBOJ 15 17.3% 5
Public Service Announcement Club 7p 36.4% 17
A Difference Array Problem Club 7p 33.3% 9
Fibonacci 1 Club 5 51.4% 28
Fibonacci 2 Club 7 25.7% 19
Perfectly Even Numbers Club 5 18.2% 16
Perfectly Even Numbers (Extreme) Club 15 14.0% 9
Supply Drop CBOJ 20p 17.4% 1