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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.
Slower!
DRY
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if input consist only 1 odd and no even number, like '1'
count(0) == 0 < 1, n.index(0) will return a ValueError
beautiful!
less is more.
yeah, we should have more foresight when coding.
i love this solution.