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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.
Think of how would you solve on paper, and addapt to code. I agree that doesn't require much programming, it's just math
I don't think this kata as 6kyu, more like 5kyu, hard math, but very satisfying to solve;