You might know some pretty large perfect squares.  But what about the NEXT one?
Complete the `findNextSquare` method that finds the next integral perfect square after the one passed as a parameter.  Recall that an integral perfect square is an integer n such that sqrt(n) is also an integer.  
If the parameter is itself not a perfect square then `-1` should be returned.  You may assume the parameter is positive.
**Examples:**
```
findNextSquare(121) --> returns 144
findNextSquare(625) --> returns 676
findNextSquare(114) --> returns -1 since 114 is not a perfect
```
def find_next_square(sq):
    x = sq**0.5    
    return -1 if x % 1 else (x+1)**2

def find_next_square(sq):
    x = sq**0.5    
    return -1 if x % 1 else (x+1)**2
