Napoleon2004的博客

#include<bits/stdc++.h>using namespace std;int n,tre[40000],s[40000];int lowbit(int x){ return x&(-x);}int query(int x){ int ans=0; for(int i=x;i>0;i-=lowbit(i)) ...

#include<cstdio>#include<cstring>#include<iostream>using namespace std;const int M=1010;int n,sum[M][M];void change(int x,int y){ int i,j; for(i=x;i>0;i-=(i&-i)) for...