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 scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		if (n<105) System.out.println(0);
		else if (n<135) System.out.println(1);
		else if (n<165) System.out.println(2);
		else if (n<189) System.out.println(3);
		else if (n<195) System.out.println(4);
		else System.out.println(5);
	}
}