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 total = 0;
		for(int a = 1 ; a <= N ; a += 2){
			int count = 0;
				for(int b = 1 ; b <= a ; b += 2){
					if(a % b == 0){
						count++;
					}
				}
			if(count == 8){
				total++;
			}				
		}		
		System.out.println(total);
	}
}