For me, description looks fine. Actually, YOUR POST pushed me towards an easy ground-roof-ground solution, haha. Even though clearly it's not how the lift is supposed to move. Idk if we should hide this thread. It felt like cheating

It's in the description.

Perhaps you are only describing how you own implementation works... but not actually a requirement of the rules?

The Kata output is:

A list of all floors that the Lift stopped at (in the order visited!)

So, if what you say was true then the top floor of the building should be part of every answer.

But it isn't.