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();
    if(n<105){
      System.out.println(0);
    }else if(n<135){
      System.out.println(1);
    }else if(n<165){
      System.out.println(2);
    }else if(n<189){
      System.out.println(3);
    }else if(n<195){
      System.out.println(4);
    }else{
      System.out.println(5);
    }
    
  }
  

  
}
