#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, ans = 0;
  cin >> n;
  n -= 10;
  if (n == 11) {
    ans += 4;
    n -= 11;
  }
  if (n == 10) {
    ans = (4 * 4) - 1;
    n -= 10;
  }
  for (int i = 9; i >= 1; --i) {
    if (n == i) {
      ans += 4;
      n -= i;
    }
  }
  cout << ans << endl;
  return 0;
}
