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) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt(), cnt = 1, tmp;
		if(n < 105) {
			System.out.println(0);
			return;
		}
		for(int m = 107; m <= n; m+=2) {
			tmp = 1;
			for(int k = 3; k <= m; k+=2) {
				if(m % k == 0)tmp++;
			}
			if(tmp == 8)cnt++;
		}
		System.out.println(cnt);
	}
}
