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 scan = new Scanner(System.in);
		int n = scan.nextInt();
		int[] a = {105, 135, 165, 189, 195};
		for (int i = 0; i < a.length; i++) {
			if (n >= 195) {
				System.out.println(5);
				return;
			}
			if (n < a[i]) {
				System.out.println(i);
				return;
			}
		}
	}
}
