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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.
Awesome.
Good to see that some folks do appreciate big O!
Awesome solution
Mine is also O(1), and a couple fewer operations, but not this elegant.
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