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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.
This solution is faulty, it could return null instead of proper result.
For instance given the following array [-3, 3, 5, 9, 1] - it'll stumble on the first pair of elements, break out from the loop before reaching the element with a value of 1 end return null.