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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 could see it as 4 kyu in python just getting the runtime down under 12 sec, but in C or C++ this is pretty simple.
I don't get it too, lol
Not the author who gives the kyu but a moderator; in this case @jhoffner the CW big chief!