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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 absolutly no need to calcul a factorial for get the trailing zero in the result of a factorial. It is just a mathematic problem where only sum and power and division is required.
Yeah had to dig into some old school symbols to make debugging the mazes easier