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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.
Please make up your mind: f(0) = 0 or 1?
(I don't have problem with anyone of these, but you're inconsistent with this in sample and random tests)
I know this kata. What is it a duplicate of?
Should this have been a translation of another one, or is it the same multiline task wrapped around a different underlying task?
Either way, it smells like a duplicate.
This is not the way to create new "1 kyu" kata.