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