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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.
True, actually I missed the second part of this kata which would be returning the sorted array. This exposes the problem, that the user can use any sorting algorithm's and I can not be sure if the bitwise operations were used or not.