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 cnt = 0;
        int tmp = 0;
        for (int i = 1; i <= n; ++i) {
            for (int j = 1; j <= i; ++j) {
                if (i % j == 0) ++tmp;
            }
            if (tmp == 8 && i % 2 == 1) ++cnt;
            tmp = 0;
        }

        System.out.println(cnt);
    }
}