#include <bits/stdc++.h>
#define int long long
#define endll '\n';
#define pb push_back
#define all(v) v.begin(), v.end()
using namespace std;


const int mod = 1e9 + 7, N = 1e6;
 
void solve()
{
 
 int x; cin >> x;
 cout << 0 << endl;
}

int32_t main()
{
  ios::sync_with_stdio(false);
  cin.tie(0);
  int t = 1;
//   cin >> t;
  while (t--) {
    solve();
}
 return 0;
}