I really want to know what was forbidden in this kata though, no clue. Is it enumerate()?

yup. And it's far more efficient, allowing to have more random tests. ;)

(I made some edits again)

Oh I guess, Blind4Basics, you and I changed simultaneously but I love your code so let's stick with it.

Thank you FArekkusu. Gave it some more randomness. It's still not 100% random though. I don't know how to make it more random without my test code being running in O(n)

Thank you so much Blind4Basics! Now I know the nightmare.

done

done

Added some random variation

A list of fixed values is not random.

won't be enough

warning: here, you're entering the nightmare of forbidding something in python. I went through that already, so I'll patch your kata, but even that has some drawbacks (for instance, some of the stuff I designed do not work anymore, apparently... Maybe some changes in cw's environment...)

That's a good point! I did it.

Thank you for pointing out. I was so naive. Added some random variation.

The large test cases should be somewhat random.
Otherwise, you can just hardcode them (it).

I passed by using simple linear search :P