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

int main(void)
{
  int ans = 0;
  vector<int> day = {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};
  for (int i = 1; i <= 12; i++)
  {
    for (int j = 0; j < day.size(); j++)
    {
      if (i == 2 && j >= 29)
        break;
      if (i == 4 && j>=30 || i == 6 && j>=30 || i == 9 && j>=30 || i == 11 && j >= 30)
        break;
      if (i == day[j])
        ans++;
    }
  }
  cout << ans << endl;
  return 0;
}