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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.
Had my Rust solution succeed on first submission and then had on a second one choke on the random test input
999999. This test might catch a lot of faulty solutions and should probably be added to the fixed tests.