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 count = 0;
		int count8 = 0;
		int n = scan.nextInt();

		int i = 1;
		int j = 1;
		while (i <= n) {
			while (j <= i) {
				if (i % j == 0) {
					count++;
				}

				j = j + 1;
			}
			if (count == 8) {
				count8 = count8 + 1;
			}
			count = 0;
			i = i + 2;
			j = 1;

		}
		System.out.println(count8);
	}

}
