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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.
Play with the equation to get
bin terms ofaso you don't have to brute-force it. (Remember you can factor!)I implemented a O(n) solution but its seems to be too slow. Someone have a better solution?