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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.
exactly
It might work but X%X will always be 0, because X is able to go into X exactly once without a remainder value.
I have a hunch that modulo will be part of the solution but unsure how to use it yet. Still working on it.