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;
		n=sc.nextInt();
		int res,count;
		res=1;
		if(n<105)
			System.out.println(0);
		else if(n==105||n==106)
			System.out.println(1);
		else
		{
			for(int i=107;i<=n;i=i+2)
			{
				count=0;
				for(int j=1;j<=i/2;j=j+2)
				{
					if(i%j==0)
					{
						count++;
					}
				}
				if(count==7)
					res++;
			}
			System.out.println(res);
		}		
	}
}
