Hi again,

• No random tests.
• the description tells nothing about the kind of requirements (performances)
• looking at your solution, it seems you're expecting some kind of time complexity, so this is to be tested properly
• the expected solution is built on some restrictions of the inputs that the description isn't talking about, which is not good at all (talking about the sign of y)
• in any case, that will still end up with your kata being a duplicate, I believe.

looks like you didn't read the documentation about writing kata, so you should begin there.

cheers

errrrrrr...

"Call a built-in" is a worthless kata idea.

This is literally a copy-paste of this kata including the description.

Edit: I've opened the trainer and the actual task is some completely unrelated crap - wtf is this kata?