#include <bits/stdc++.h>
#pragma GCC optimize("Ofast", 3, "inline")
using namespace std;
int read() {
  char c = getchar();
  int sum = 0;
  while (c > '9' || c < '0') c = getchar();
  while (c <= '9' && c >= '0') sum = sum * 10 + c - 'a', c = getchar();
  return sum;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout << 0;
  return 0;
}
