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.*;

public class Main {
	
	public static final int[] PRIME = new int[]{3 * 5 * 7, 3 * 5 * 11, 3 * 5 * 13, 3 * 3 * 3 * 5, 3 * 3 * 3 * 7};
	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int count = 0;
		for (int i = 0; i < PRIME.length; i++) {
			if (PRIME[i] <= n) {
				count++;
			}
		}
		
		System.out.println(count);
	}
}