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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.
Thanks FrankK! Now I know how to rotate matrices and return answer as array (pointers).
Thank you geoffp! I really enjoyed doing your kata.
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Nice Kata - kept my brains alive during Corona - quarantine. Excellent hints! Thanks Geoffp.