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 {
	 static int count(int n) {
		int cnt = 0;
		for(int i = 1; i <= n; i++) {
			if(n%i == 0) {
				cnt++;
			}
		}
		return cnt;
	}
	
	
		
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int n = stdIn.nextInt();
		int cnt = 0;
		for(int i = 1; i <=n; i++) {
			if(i%2 == 0) {
				continue;
			}
			if(count(i)==8) {
				cnt++;
			}
		}
		
		System.out.println(cnt);
		
		
	}

}
