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.io.IOException;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = 0;

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

		System.out.println(ans);

		sc.close();
	}
}
