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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.
Make sure the average is rounded down if it's less than 5.5. The problem statement doesn't say that. But for me, this is what the random tests were complaining about.
Show us some code and we'll see