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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.
Increased scrutiny of test cases to avoid hardcoded and imprecise solutions.
rootSum() is new function name
root_sum() is new function name
Replaced rooter.RootSum() with function()
Replaced reference solution with your efficient solution.