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 scanner = new Scanner(System.in);
		   
			int N = scanner.nextInt();
			int count = 0;
			
			
			if( N >= 105 ) 
			{
				count++;
			}
			if( N >= 135 ) 
			{
				count++;
			}
			if( N >= 165 ) 
			{
				count++;
			}
			if( N >= 189 ) 
			{
				count++;
			}
			if( N >= 195 ) 
			{
				count++;
			}
			
			System.out.println(count);
			
		    scanner.close(); }
		  }