Codeforces Beta Round 70 (Div. 2) C. Beaver Game
Yandex.Algorithm 2011: Qualification 2 C. General Mobilization
Yandex.Algorithm 2011: Qualification 2 D. Two out of Three
Codeforces Beta Round 73 (Div. 1 Only) C. Interesting Game
Codeforces Round 915 (Div. 2) D. Cyclic MEX
Codeforces Round 894 (Div. 3) F. Magic Will Save the World
Codeforces Round 894 (Div. 3) E. Kolya and Movie Theatre
Educational Codeforces Round 154 (Rated for Div. 2) D. Sorting By Multiplication
Educational Codeforces Round 154 (Rated for Div. 2) C. Queries for the Array
Codeforces Round 892 (Div. 2) D. Andrey and Escape from Capygrad