You win.

Genius.

Well done.

Really makes you think… Took me few hours of thinking before I realized the way to solve it, but I'm glad I did it. We need more katas like this one!

Next level.

TFW you make redundant code because non-redundant code in Python is too boring.

When I saw the title of this kata I instantly knew it will be something silly and related to wubwubwub lol.

What?…

I have absolutely no idea how to solve this or what I just did, but looks like that works.

Please don't use «bool» as a variable :-)

This should be 6 or 7 kyu.

Why didn't you print the input?
Does it work? Right, I'm new at CW and when I try to print anything I don't see any output, I thought CW interpreter just ignores prints.

Anyway, I completed the kata, and don't really care about its description anymore.

Can we please make kata description better, show examples of empty lists or None and what they should actually return?

If a or b are empty then the result is self-evident.

"a or b are empty or not empty lists."

Am I supposed to return string "a or b are empty or not empty lists."? All my tests except one last test work and I don't even know what's wrong with it. Is it possible that last test (for Python) is wrong? Or I don't understand the task correctly.

UPD: Somehow managed to complete it and I'm not even sure what I was doing wrong, but description is worded poorly IMHO (sorry, author, no offence), no real examples of empty lists or None objects, no explanation of arrays of different length, and self-evident part was not self-evident to me at all. Please make the task clear next time.

This is… Neat but at the same time disgusting lol.

From performance point of view, is deque better than just reverse sorted list?