Codeforces Round 628 (Div. 2)

03-17

Codeforces Round 525 (Div. 2)

12-26

Codeforces Round 513 (rated, Div. 1 + Div. 2)

10-07

Codeforces Round 506 (Div. 3)

08-25

Codeforces Round 483 (Div. 2)

05-17