「Codeforces 338D」GCD Table

01-27

「Codeforces 1029F」Multicolored Markers

12-04

「Codeforces 916E」Jamie and Tree

12-02

「Codeforces 1080D」Olya and magical square

11-25

「Codeforces 1080C」Masha and two friends

11-25

「Codeforces 527D」Clique Problem

11-21

「Codeforces 351B」Jeff and Furik

11-21

「Codeforces 914D」Bash and a Tough Math Puzzle

11-19

「Codeforces 981D」Bookshelves

11-17

「Codeforces 1027D」Mouse Hunt

08-19