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 divCount=0;
		int matchCnt=0;

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