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 a[]= new int[201];
		for (int i=1;i<200;i++) {
			a[i] ++;
		}
		for (int i=3;i<200;i+=2) {
			for (int j=1;j*i<200;j+=2) {
				a[i*j]++;
			}
		}
		int N =sc.nextInt();
		int count =0;
		for (int i=1;i<=N;i++) {
			if (a[i]==8) {
				count ++;
			}
		}
		System.out.println(count);
	}
}