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) {
		try (Scanner sc = new Scanner(System.in)) {
			int N = sc.nextInt();
			if (N < 105) {
				System.out.print(0);
				return;
			}
			int sum = 1;
			for (int i = 107; i <= N; i += 2) {
				int yakusuu = 2;
				for (int j = 3; j < i; j += 2) {
					if (i % j == 0)
						yakusuu++;
					if (yakusuu > 8)
						break;
				}
				if (yakusuu == 8)
					sum++;
			}
			System.out.print(sum);
		}
	}
}
