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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.
Performance is not only about short code or long code. You need to think about the time and space complexity. I'm having the same issue while it's an 0(n). I'm trying to find the best way to do this
Wow, What are those 3 points before str for ?