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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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Can you expand your answer - I would say that solution is comparable to one using for loop
this way of doing it is very slow. but it has little code. do a runtime comparison with other codes