摘要: #include<bits/stdc++.h> typedef long long int ll; using namespace std; const int N = 2e5 + 10; #define lowbit(x) x & -x ll c[N], a[N]; void modify(ll 阅读全文
posted @ 2022-11-18 16:35 wockcow 阅读(29) 评论(0) 推荐(0)