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.*;
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 sum=0;
		for(int j=1; j<=n; j=j+2){
			// スペース区切りの整数の入力
				int miniSum =0;
			for(int i=1; i<=j; i++){
				if(j % i == 0){
				miniSum++;
				}
			}
			if(miniSum==8){
				sum++;
			}
		}
		System.out.println(sum);
	}
}