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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.
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yes, i too have that problem with random negative values on Haskell!
How did this compile? I had a very similar solution but I got a compiler error about undefined reference to ackermann::value.
This could be fixed by creating an instance of the static value (see Unnamed's solution) or using an enum.