#include<iostream>
#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<vector>
#include<map>
#include<queue>
#include<set>
#include<stack>
#define ll long long
#define endl '\n'
#define debug cout << "debug" << endl
using namespace std;

int main(){
	freopen("road.in", "r", stdin);
	freopen("road.out", "w", stdout);
	ios::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	cout << 0;
	return 0;
}

