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>
using namespace std;
int main(){
long a,b,c=0,d=1,zc=0;
scanf("%ld",&a);
for(b=1;b<=a;b=b+2){
while(d<=b){if(b%d==0){c++;}d++;}
if(c==8){zc++;}
d=1;c=0;
}
printf("%ld",zc);
return 0;
}