Contest Archive

Browse through our past competitions, problems, and solutions. A valuable resource for practice and learning.

2025

A
Polly's New LaptopBasic
ProblemSolution
B
Make the GradeEasy
ProblemSolution
C
Magical MirrorEasy
ProblemSolution
D
Starr Showdown!Easy
ProblemSolution
E
Hexadecimal HexMedium
ProblemSolution
F
Blocked OutMedium
ProblemSolution
G
Recursive DartboardHard
ProblemSolution
H1
Bitstring Birthday Game (Easy Version)Medium
ProblemSolution
H2
Bitstring Birthday Game (Hard Version)Medium
ProblemSolution
I1
High Rollers (Easy Version)Medium
ProblemSolution
I2
High Rollers (Hard Version)Hard
ProblemSolution
11 problems