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();
		
		int cnt = 0;
		
		for (int i = 1; i <= n; i += 2) {
			int tmp = 0;
			for (int j = 1; j * j <= i; j++) {
				if (i % j == 0) {
					if (j * j == i) tmp++;
					else tmp += 2;
				}
			}
			if (tmp == 8) cnt++;
		}
		
		System.out.println(cnt);
		
	}

}
