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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.
You don't get this kind of joy out of a stupid brute force solution if you knew beforehand that it was easy. -- i second that
My word! I was trying to invent an algo for three bloody hours! Woke up the next day and thought why not just brute-force it. KISS!