#include <bits/stdc++.h>
#define ll long long
using namespace std;
ll max_(ll x, ll y) {
	return (x>y) ? x:y;
}
int main() {
	freopen("road.in","r",stdin);
	freopen("road.out","w",stdout);
	ios :: sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cout << 0;
	return 0;
}
