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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 should defer calculations of sqrt as late as you can (not do it right away), trying to return as early as you can, and considering various edge cases.
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