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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.
Trivial map/filter/reduce is not a novel kata idea.
Input range of
nis not specified. What ifnis zero, or negative? There should at least be a test for this.Needs random tests