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.*;
import static java.lang.Math.*;
import java.math.BigInteger;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		
		// 計算
		int result = 0;
		for(int i = 1; i <= n; i++){
		    if(i%2 == 0) continue;
		    int cnt = 0;
		    for(int j = 1; j <= i; j++){
		        if(i%j == 0) cnt++;
		    }
		    if(cnt == 8) result++;
		}
		
		// 出力
		System.out.println(result);
	}
}
