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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.
Misunderstood circle. Thought it could go two ways.
Wrong if statement. Should be (n < 0 || (n & 1) == 0)
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The sumbit test case for n=150 is timing out when I used recursive. Might be a bit high.
You have no safeguard for the case n == 2; This would result endless calling of nth() with n < 0.
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