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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.
Are there any issues with the negative random test cases for haskell, it passess all tests including the given negative tests but for some reason fail on the random negative values, and I am not able to see the issue here.