「Edu Codeforces Round」#134

「Codeforces Round」#816 (Div 2)

「Codeforces Round」#815 (Div 2)

「Codeforces Round」#805 (Div 3)

「Codeforces Round」#814 (Div 2)

「Codeforces Round」#813 (Div 2)

「Codeforces Round」#812 (Div 2)

「Edu Codeforces Round」#133 (Div 2)

「Codeforces Round」#811 (Div 3)

「Codeforces Round」#806 (Div 4)