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 stdIn = new Scanner(System.in);
		int n = stdIn.nextInt();

		System.out.println(cnt(n));

		stdIn.close();
	}

	private static int cnt(int n) {
		if(n >= 195) {
			return 5;
		}
		if(n >= 189) {
			return 4;
		}
		if(n >= 165) {
			return 3;
		}
		if(n >= 135) {
			return 2;
		}
		if(n >= 105) {
			return 1;
		}
		return 0;
	}
}
