代码模板(更新中)

/*
*
*/
#include <iostream>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <string>
#include <cmath>
#include <cstdlib>
#include <set>
#include <vector>
#include <map>
#include <stack>
#include <queue>
#define fi first
#define se second
#define rep(i,l,r) for (int i = l; i <= r; ++i)
#define rrep(i,r,l) for (int i = r; i >= l; --i)
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int MAXN = 1e6 + 5;
const int INF = 0x3f3f3f3f;
const int mod = 1e9 + 7;

int main()
{

}