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