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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.
I'm trying to submit in SQL but running into an error. The test wants the column type for 'res' to be integer, but integer in SQL only stores values between -2147483648 to 2147483647 and submit has numbers bigger than that. When using bigint it fails, and you cannot mix type.