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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.
I updated the python version to make it undisturbed by input mutation.
nope: don't mutate the input.
shallow copy isn't enough for nested structures.
Random tests return -1 in spite of the enough ingridients. This Kata is broken