标签: 树状数组

2017
2017-05-16
Playrix Codescapes Cup (Codeforces Round #413, rated, Div. 1 + Div. 2)
2016
2016-05-11
Codeforces Div 2 C 天梯 26——30
2016-04-28
Codeforces Round #348 Div 2+Div 1 C 题解