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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.
Solution 1 is clean and efficient!
Single loop for counting & summing
Explicit empty-array check
No unnecessary list creations
Perfect balance of readability and performance
Pythonic and maintainable! 🐍💡
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