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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.
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" means that your code may be correct, but is too slow. Full brute force is not going to work for this one, try to think how you can optimize your code.This comment is hidden because it contains spoiler information about the solution