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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.
only leave should_work_for_random_tests fail, why?
Looks not difficult, but logically complex. It took hours to find a solution that works, yet I believe there must be a simpler approach.
Great the final else branch!
Need to be careful with nested brack.
I have met the same problem in python.