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 in = new java.util.Scanner(System.in);
		int N = in.nextInt();
		int ans = 0;
		
		for(int i=1; i<=N; i=i+2) {
			if(yaku(i) == 8) {
				ans++;
			}
		}
		
		System.out.println(ans);
		in.close();
	}
	
	public static int yaku(int N) {
		int count=0;
		for(int i=1; i<=(int)Math.sqrt(N); i++) {
			if(N%i==0) {
				count += 2;
			}
		}
		return count;
	}
}