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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.
above (revised) code passes; possible cout formatting in the browser misled me earlier... closing now, thank you!
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C++. I have screenshots of the test runs with dumped mazes, to demonstrate this cases, which I can post (somehow) if anyone's interested.
I am seeing test cases that are not NxN, and test cases where there is no possible path to the exit, but the test validator returns true.