#include <bits/stdc++.h>
using namespace std;

int main(void)
{
  vector<int> num = {1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 3, 4};
  int ans = 0;
  for (int i = 1; i <= 12; i++)
  {
    for (int j = 0; j < num.size(); j++)
    {
      if (j >= 29 && i == 2)
        break;
      if (j >= 31 && i == 4 || j >= 31 && i == 6 || j >= 31 && i == 9 || j >= 31 && i == 11)
        break;
      if (i == num[j])
      {
        ans++;
      }
    }
  }
  cout << ans << endl;
  return 0;
}