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) throws Exception {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int ans = 0;
        if(N >= 195){
            ans = 5;
        }else if(N >= 189){
            ans = 4;
        }else if(N >= 165){
            ans = 3;
        }else if(N >= 135){
            ans = 2;
        }else if(N >= 105){
            ans = 1;
        }
        System.out.println(ans);
    }
}
