#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N=;
signed main(){
#ifndef XYZ
	freopen("traverse.in","r",stdin);
	freopen("traverse.out","w",stdout);
#endif
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	return 0;
}

