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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.
It would help if you showed the steps in the middle. Just showing [N_1, D] and then [N_n, D] doesn't make any sense to me. Show me what happens in between.
nice, learned a lot from this fizzbuzz implementation