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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.
Allocating a stack increases space complexity more than necessary. A single int variable can be used for a more space efficient solution.
Using exception for validation is a poor practice.
Even though this is very succinct, it is not very readable.
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