It shows me an arror when I try this solution

woah I forgot you could do this!

this is definitely my favorite solution to this... wish I'd thought of it.

Wonderful

What I did lol

ugh that looks so satisfying, i love to try and make all my code as compact as possible. how did i not think of this?!?

In Python, you can make another identifier refer to the same function by assignment.

I'm confused. How does this work?

one line alert

so clean

Yes, thanks, totally forgot about that. Regarding the comment, we need to remove O(log n) and we get O(n^2) time complexity.

1. I think, it doesn't matter because you use a dictionary like a set and both structure use hashtable or something similar under the hood.
2. It's a worst case complexity.
3. Yes, both solutions need O(n^2) time in worst case.