摘要: from : acwing #include <bits/stdc++.h> using namespace std; const int N = 100001; int n, m; int tree[N], a[N]; int lowbit(int x){ return x & -x; } voi 阅读全文
posted @ 2021-04-08 14:06 acwarming 阅读(36) 评论(0) 推荐(0) 编辑