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 ans = 0;

		for (int i=1; i<=n; i+=2){
			int divisor = 0;
			for (int j=1; j<=i; j++){
				if (i % j == 0){
					divisor++;
				}
			}
			if (divisor == 8){
				ans++;
			}
		}
		System.out.println(ans);
	}
}