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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.
The instructions speak of square matrices but the test data for the attempts contained non-square ones. This took me some time and it seems to me like a bug. (This was the Rust version.)
In Haskell the module should probably be renamed
from PyrimidSlideDown.Test
to PyramidSlideDown.Test