Yes. Exceptions shouldn't be used for flow control. In a real setting, you'd probably parse it as a long (and possibly catch that exception) then check the size for the actual type.

That being said, it is really easy to see what is happening, which is good.

And it looks pretty. :-)

Wouldn't the code be slower because of the try-catch check?

just for arguments sake, i wouldnt make human an interface since men and women share attributes, not just behaviors

But since there is no test for this case you could submit a solution that doesn't return 0 if all numbers in the list are negative.