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);
		// 整数の入力
		int N = sc.nextInt();

		int ans = 0;
		for(int i = 1;i <= N;i = i + 2){
			int cnt = 0;
			for(int j = 1;j <= i;j++){
				int tmp = i % j;
				if(tmp == 0){
					cnt ++;
				}
			}
			if(cnt == 8){
				ans ++;
			}
		}
		
		System.out.println(ans);
		
   		sc.close();
        return ;

    }
    
}

