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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.
Already fixed
The real test cases are very carefully written so that the point will never lie on the exact edge. It is possible that your browser is displaying it incorrectly if that's what you're seeing.a
What test is that? There's only one quadrilateral test, and it's a square from [-5, -5] to [5, 5].