Codeforces Round #667 (Div. 3)

Codeforces Round #643 (Div. 2)

Codeforces Round #636 (Div. 3

Codeforces Round #634 (Div. 3)

Codeforces Round #633 (Div. 1)

CodeCraft-20 (Div. 2)

Ozon Tech Challenge 2020 (Div.1 + Div.2)

Codeforces Round #624 (Div. 3)

Codeforces Round #621 (Div. 1 + Div. 2)

Codeforces Round #576 (Div. 1+Div.2)

Codeforces Round #620 (Div. 2)

Codeforces Round #549 (Div. 1)

Codeforces Round #618 (Div. 1+2)

Codeforces Round #616 (Div. 2)

Codeforces Round #615 (Div. 3)

Codeforces Round #606 (Div. 2)

Codeforces Round #604 (Div. 2)

Codeforces Round #603 (Div. 2)