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 x = 0; 
        int ans = 0;

        for(int i=1; i<=N; i+=2){
            for(int j=1; j<=i; j++){
                if(i%j==0){
                    x += 1;
                }
            }
            if(x==8){
                ans += 1;
            }
            x = 0;
        }
        System.out.println(ans);
    }
}