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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.
You are absolutely correct. I did not focus on the fact of multiplicity, but on the fact of division. I would like to delete my erroneous comment. I appreciate the response.
The first index should never be counted. Because division by zero is an indeterminacy. Please correct the tests.