#include <bits/stdc++.h>
using namespace std;
int main() {
  int shaddehbastoni[14] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 11};
  int bnet = 10;
  int sum;
  cin >> sum;
  int counter = 0;
  int ba8ee = sum - bnet;
  if (ba8ee == 0)
    cout << 0 << endl;
  else {
    for (int i = 0; i < 14; i++) {
      if (shaddehbastoni[i] == ba8ee) counter += 4;
    }
    if (ba8ee == 10)
      cout << counter - 1 << endl;
    else
      cout << counter << endl;
  }
  return 0;
}
