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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.
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While this probably works for the majority of cases, it does have a bug. The problem specifically asks for the first longest occurrence. This algorithm will find the longest occurrence according to string ordering in Elixir, which happens to be alphabetical.
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