The number 105 is quite special - it is odd but still it has eight divisors. Now, your task is this: how many odd numbers with exactly eight positive divisors are there between 1 and N (inclusive)?

Constraints

* N is an integer between 1 and 200 (inclusive).

Input

Input is given from Standard Input in the following format:


N


Output

Print the count.

Examples

Input

105


Output

1


Input

7


Output

0
#include <cstdio>

int main()
{
  int n;
  scanf("%d", &n);
  puts(n < 105 ? "0" : n < 135 ? "1" : n < 165 ? "2" : n < 189 ? "3" : n < 195 ? "4" : "5");
  return 0;
}