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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.
well, although the time needed to complete the Kata affects no honor and is not very important, just to make it clear, 9 minutes was the time I needed to fix the last bug, not to complete it. The time stuff in codewars is not very accurate.
nonetheless, this is a very interesting Kata.
Never mind, avoided recursion now and solved the problem.
I got "RangeError: Maximum call stack size exceeded" for the fourth case. Is it also intended?