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
import java.util.*;
class Main
{
  public static void main(String[] atgs)
  {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int cnt = 0;
    for(int i = 1; i <= N; i+=2){
      int tmp = 0;
      for(int j = 1; j <= i; j+=2){
        if(i % j == 0){
          tmp++;
        }
      }
      if(tmp == 8) cnt++;
    }
    System.out.println(cnt);
  }
}