(3 years, wow! Sorry for the "ressurrection") also if you parse x into an int instead floor (correct me if I am wrong) if there was any float as arbument you grant it will works too.

Misclicked 'Submit' before removing print(), duh

Ouch, that hurts

Thank you, I missed that - then indeed there's no need for dealing with sqrt- and ^2-ing :)

"X will be a valid integer number."

Only valid for integer x. Works wrong for, say, x = 31.7

Like this one so much!

In this particular case it doesn't make sense.
Probably author had to cast while developing the solution and then forgot to remove it during final refactoring.