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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.
Line that starts from "50" can't expact for "YES"
The test (samples or otherwise) won't seem to start. I'm 90% sure I did everything right, but the tests won't run.
Great kata, though, for the purposes of the exercise (at least in C#), taking and returning a 2D array, rather than an array of arrays probably would have been simpler and made more sense, given that the arrays will always have a consistent number of rows and columns.
But solving it through math is so much easier...