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 y = 0;
		int counter = 0;
		for (int j = 1; j <= n; j+=2) {

			y = 0;
			for (int i = 1; i <= j; i++) {
				if (j % i == 0) {
					y++;
				}
			}
				if (y == 8) {
					counter++;
				}
			
		}
		System.out.println(counter);

	}

}