#include <bits/stdc++.h>
#define int long long
using namespace std;
const int N=1e6+10;
int c;
signed main(){
	freopen("employ.in", "r", stdin);
	freopen("employ.out", "w", stdout);
	ios::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);
	
	while(cin>>c);
	cout<<0;
	
	return 0;
}
