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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
"Clarity before performance". O(2n) vs O(nlgn), where do you lose your performance?
Maintainability is more important than performance is most cases. Even more so when we are talking about small amounts of data in a tiny program. If you make a loop that has to go through a gigantic list of entries, then sure I'll agree.
That aside, I don't know any Python at all. This is just the solustion for the translation that was submitted.