//div2 hard,indeedNow D
#include <bits/stdc++.h>
using namespace std;
const int MOD = 1e9+7;
typedef long long ll;
const int INF = 1e9;

int main(void) {
	vector<int> a(1000000000);
	a[99999999] = 7;
cout  << 0 << endl;
	return 0;
}