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<stdio.h>
int main(){
int n,ans=0;
scanf("%d",&n);
if(n>=105)
ans++;
if(n>=165)
ans++;
if(n>=195)
ans++;
if(n>=135)
ans++;
if(n>=189)
ans++;
printf("%d\n",ans);
return 0;
}