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2025 (2)

10-27
CF2110D Fewer Batteries
08-13
CF2096D Wonderful Lightbulbs

2024 (8)

12-24
CF570C Replacement
12-23
CF1468G Hobbits
12-21
CF2048C Kevin and Binary Strings
12-21
CF2048B Kevin and Permutation
12-21
CF1732D1 Balance (Easy version)
12-09
CF234G Practice
10-25
CF2033E Sakurako, Kosuke, and the Permutation
10-25
CF2033F Kosuke's Sloth