hfccccccccccccc:
博客地址:https://www.cnblogs.com/hfccccccccccccc/
hfccccccccccccc:
博客地址:https://www.cnblogs.com/hfccccccccccccc/
Codeforces Round #516 Div2 D. Labyrinth
Codeforces Round #511 Div2 D. Little C Loves 3 II
Codeforces Round #511 Div2 C. Enlarge GCD
Educational Codeforces Round #52 D. Three Pieces
Educational Codeforces Round #52 C. Make It Equal
Educational Codeforces Round #52 B. Vasya and Isolated Vertices