我做题、比赛的头文件，不断更新中

#include <cstdio>
#include <iostream>
s#include <string.h>
#include <cstdlib>
#include <algorithm>
#include <queue>
#include <vector>
#include <cmath>
#include <map>
#include <stack>
#include <stdlib.h>
using namespace std;
int const uu[4] = {1,-1,0,0};
int const vv[4] = {0,0,1,-1};
typedef long long ll;
int const maxn = 50005;
int const inf = 0x3f3f3f3f;
ll const INF = 0x7fffffffffffffffll;
double eps = 1e-10;
double pi = acos(-1.0);
#define rep(i,s,n) for(int i=(s);i<=(n);++i)
#define rep2(i,s,n) for(int i=(s);i>=(n);--i)
#define mem(v,n) memset(v,(n),sizeof(v))
#define lson l, m, rt<<1
#define rson m+1, r, rt<<1|1