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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.
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Square Matrix Multiplication
error when ==> [
[1, 2, 4],
[3, 2, 5]
],
[
[3, 2],
[1, 1],
[2, 4]
]
I'd never know there is such formula if I hadn't seen your solution.
I'm having the same problem you did, how exactly did you resolve yours again?