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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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In swift, how you do call the "sortedMErge" function with a node that has more than one value? The function only accepts an int, not an array.
Really like that if let for identifying a number 0...9!