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;

class Main {
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int count = 1;
		
		if (n < 105) {
			System.out.println(0);
			System.exit(0);
		}
		
		int cnt;
		for (int i = 107; i <= n; i+=2) {
			cnt = 2;
			for (int j = 2; j < i; j++) {
				if (i % j == 0) cnt++;
			}
			if (cnt == 8) count++;
		}
		
		System.out.println(count);
	}
}