// Copyright (c) 2024 ely. All rights reserved.

#include<iostream>
#include<cstdio>
#include<cmath>
#include<time.h>
#include<cstring>
#include<vector>
#include<fstream>
#include<algorithm>

using namespace std;

/* 使用宏进行快读,使用时尽量注意,不要使用表达式作为参数 */
#define FAST_READ(data) do{
	data=0; char ch;
    do{ch = getchar();}while(ch<'0' || ch>'9');
    do{data = data * 10 + (ch - '0'); ch = getchar();} while(ch > '0' && ch < '9');
} while(0);

int main()
{
//	freopen("in","r",stdin);
//	ios::sync_with_stdio(false);cin.tie(0),cout.tie(0);
	return 0;
}