Mar 16

Educational Codeforces Round 124 (Rated for Div. 2)

Mar 10

Codeforces 10E Greedy Change

Jul 17

Codeforces Round #654 (Div. 2) F. Raging Thunder

Jul 14

Codeforces Round #654 (Div. 2) E. Asterism

Jul 9

Codeforces Global Round 9 D. Replace by MEX

Oct 1

Codeforces Round #587 (Div. 3) F. Wi-Fi