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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.
The performance may be slow.
It may be the fastest solution, though the code is a little bit much.
You can reference my solution, which may be the fastest way. Hope it will help you.
You can view my solution. I think my solutin may be one of the fastest anwsers, though the code is a little bit much.