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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.
That's a great way to explain it!
Using reduce in and of itself doesn't make it an O(n^2) solution. Using it in every step of the loop does.
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ha
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spoiler flags, please...
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This is the correct solution. Solved in constant time, no brute force.
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