預設源

/*
	Auth: Loxilante
	Date: 
	Prog: 
	Think twice, code once. Think once, debug FOREVER!
*/
 
#define F_C
#include <bits/stdc++.h>
#define rep(i, l, r) for(int i = l; i < r; i++)
#define hrp(i, l, r) for(int i = l; i <= r; i++)
#define rev(i, r, l) for(int i = r; i >= l; i--)
#define ms(n, t) memset(n, t, sizeof(n))
#define pb push_back
#define int ll
#ifndef JOEON
#define D(...) 97
#endif
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
template<typename tn = int> inline tn next(void) { tn k; cin>>k; return k; }
signed main(void)
{
	#ifdef JOEON
//		freopen("C:\\Users\\32676\\Desktop\\IN.txt", "r", stdin);
//		freopen("C:\\Users\\32676\\Desktop\\OUT.txt", "w", stdout);
	#endif
 
	ios::sync_with_stdio(false);
	cin.tie(0);



	return 0;
}
/*
 
 */