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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.
Funny!
spoiler flag...
No, those warning do not affect your code. Your problem is
which means your code timed out, and you need to fix your code ;-)