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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.
Please check Time complexity
If it gives time out, you don't pass all the tests. It means your code is not fast enough, or maybe in some cases it gets lost in an infinite loop. Hopefully this may help: Troubleshooting Your Solution.