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 result = 0;
		for(int i = 1; i <= n; i += 2){
			int count = 0;

			for(int j = 1; j <= i; j++){
				if(i % j == 0){
					count++;
				}
			}

			if(count == 8){
				result++;
			}
		}

		System.out.println(result);

	}

}
