#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n;
  cin >> n;
  if (n <= 10 || n > 21)
    cout << 0 << endl;
  else {
    if (n - 10 < 10 || n - 10 > 10)
      cout << 4 << endl;
    else
      cout << (4 * 4) - 1 << endl;
  }
  return 0;
}
