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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.
What failures are you getting? I cannot see your solution so I've no way to know what it is happening unfortunately.
For my solution using 'C', random tests are failing.
The error message is not helpful either.
@treffynnon could you plese look into it. I don't want to forfeit :D