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();
		sc.close();
		
		int ans = 0;
		
		for(int i = 1;i <= N;i+=2) {
			int count = 0;
				for(int j = 1;j <= i/2;++j)
					if(i % j == 0)
						count++;
			if(count == 7)
				ans++;
		}
		
		System.out.println(ans);
	}

}