Loading collection data...
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.
Found this so hard to get my head round. Feels like it should be easy to reason about the recursion, but for me, it wasn't!
I enjoyed the challenge though!
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This comment is hidden because it contains spoiler information about the solution