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<iostream>
int main(){int n,c=0;scanf("%d",&n);c+=n>104;c+=n>134;c+=n>164;c+=n>188;c+=n>194;printf("%d",c);return 0;}