Ojs
Atcoder
4
Codeforces
12
C. Light Switches - Codeforces Round 963 (Div. 2)
D. Med-imize - Codeforces Round 963 (Div. 2)
E. Level Up - Educational Codeforces Round 168
D. Maximize the Root - Educational Codeforces Round 168
G. Penacony - Codeforces Round 962 (Div. 3)
F. Bomb - Codeforces Round 962 (Div. 3)
E. Decode - Codeforces Round 962 (Div. 3)
D. Dense Subsequence - Intel Code Challenge Final Round
C. Sonya and Problem Wihtout a Legend - Codeforces Round 371 (Div. 1)
B. Searching Rectangles - Codeforces Round 371 (Div. 1)
C. The Values You Can Make - Codeforces Round 360 (Div.1)
E. Wooden Game - Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)