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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.
Swift takes a long time to start up which might timeout sometimes, so just try a few times.
I think this kata has an issue on Swift version.
I just return a constant number and execute the test, but it says "TIMEOUT ERROR".