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.*;

public class Main{

  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    int n = sc.nextInt();
    int ans = 0;

    for(int i=3; i<=n; i+=2){
      int count =0;
      for(int j=1;j<=i;j++){
        if(i%j==0){
          count += 1;
        }
      }
      if(count==8){
        ans +=1;
      }
    }

    System.out.println(ans);

  }

}