## A square of squares
You like building blocks. You especially like building blocks that are squares. And what you even like more, is to arrange them into a square of square building blocks!
However, sometimes, you can't arrange them into a square. Instead, you end up with an ordinary rectangle! Those blasted things! If you just had a way to know, whether you're currently working in vain… Wait! That's it! You just have to check if your number of building blocks is a _perfect square_.
## Task
Given an integral number, determine if it's a [square number](https://en.wikipedia.org/wiki/Square_number):
> In mathematics, a __square number__ or __perfect square__ is an integer that is the square of an integer; in other words, it is the product of some integer with itself.
The tests will _always_ use some integral number, so don't worry about that in dynamic typed languages.
### Examples
```
-1  =>  false
 0  =>  true
 3  =>  false
 4  =>  true
25  =>  true
26  =>  false
```
import math
def is_square(n):    
    try:
        return math.sqrt(n).is_integer()
    except ValueError:
        return False
import math
def is_square(n):    
    try:
        return math.sqrt(n).is_integer()
    except ValueError:
        return False