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) {
		// TODO Auto-generated method stub
Scanner SC = new Scanner(System.in);
int N = SC.nextInt();
int ans = 0;
for(int i = 1; i <= N; i++) {
	if(i%2 == 0) {
		continue;
	}
	int count = 0;
	for(int j = 1; j <= i; j++) {
		if(i%j == 0) {
			count++;
		}
	}
	if(count == 8) {
		ans++;
	}
}
System.out.println(ans);

	}

}
