#include<iostream>
int main(){int n;std::cin>>n;std::cout<<(n>104)*((n-75)/30+(n>188));}
### Prompt

In CPP, your task is to solve the following problem:

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

### Response

```cpp
#include<iostream>
int main(){int n;std::cin>>n;std::cout<<(n>104)*((n-75)/30+(n>188));}
```