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.Scanner;
public class Main{
   public static void main(String[] args){
     int n = new Scanner(System.in).nextInt();
     int i, j;
     int ans=0, temp=0;
     for(i=1;i<=n;i+=2){
       for(j=1;j<=i;j++){
         if(i%j==0){
           temp++;
         }
       }
       if(temp==8){
         ans++;
       }
       temp=0;
     }
     System.out.println(ans);
   }
}
