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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.
i have the same issue, is there a way to fix the tests?
2 is prime (the only divisors of 2 are 1 and 2 itself), but the random test says that it should return [2, 1]
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Can you explain the reduce?