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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.
Just a heads up: It appears the changes haven't taken effect (yet). I completed the C# version of the kata a few moments ago, and apparently the test case with n==0 still expects an array with one element equal to 0.0d. I could not submit my solution without adding the corresponding condition.