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
#include<cstdio>

int n,ans;

int main()
{
	scanf("%d",&n);
	for(int i=1; i<=n; i++)
	{
		int tmp=0;
		for(int j=1; j<=i; j++)if(i%j==0)tmp++;
		if(tmp==8&&i&1)ans++;
	}
	printf("%d",ans);
	return 0;
}