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[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int j = 0;

        for(int i=1;i<=n;i=i+2){
            int a = 0;
            for(int m=1;m<=i;m++){
                
                if(0==i%m){
                    a++;
                }
                if(a==8){
                    j++;
                }
            }
        }
        System.out.println(j);
    }
}