【模板】头文件

#include<iostream>
#include<string>
#include<queue>
#include<stack>
#include<vector>
#include<map>
#include<cstdio>
#include<cstdlib>
#include<algorithm>
#include<set>
#include<list>
#include<iomanip>
#include<cstring>
#include<cmath>
#include<limits>
#include<cctype>
using namespace std;

#define debug(i) cout<<"<debug> "<<#i<<" "<<i<<" <\debug>"<<endl
#define mfor(i,a,b) for(register int i=(a);i<=(b);i++)
#define mrep(i,a,b) for(register int i=(a);i>=(b);i--)
#define lll __int128
#define Re register
#define mem(a,b) memset(a,(b),sizeof(a))
#define Design ios::sync_with_stdio(0),cin.tie(0),cout.tie(0)
typedef pair<int, int> intpair;
typedef pair<long long int, long long int> llpair;
typedef long long int ll;
const int INF = 0x3f3f3f3f;
const long long int INFLL = 0x3f3f3f3f3f3f3f3f;