#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int count = 0;
  int arr[] = {1,  1,  1,  1,  2,  2,  2,  2,  3,  3,  3,  3,  4,  4,
               4,  4,  5,  5,  5,  5,  6,  6,  6,  6,  7,  7,  7,  7,
               8,  8,  8,  8,  9,  9,  9,  9,  10, 10, 10, 10, 11, 11,
               11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10};
  for (int i : arr) {
    if (i + 10 == n) {
      count++;
    }
  }
  cout << count;
  return 0;
}
