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();

		int count = 0;
		for(int i=1; i<=N; i++) {
			int judge = 0;
			for(int j=1; j<=i; j++) {
				if(i % j == 0 && i % 2 == 1) {
					judge ++;
				}
			}if(judge == 8) {
				count ++;
			}
		}
		System.out.println(count);

	}

}
