#include<bits/stdc++.h>
using namespace std;
constexpr int mod=1e9+7;
inline void Main(){
	
}
int main(){
	ios::sync_with_stdio(false),cin.tie(nullptr),cout.tie(nullptr);
	freopen("traverse.in","r",stdin);
	freopen("traverse.out","w",stdout);
	int T=1;
//	cin>>T;
	while(T--)Main();
	return 0;
}
