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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.
Specify issue. 78 warriors had no problems in JS.
With my sol'n (JavaScript), a single randomized test will sometimes resolve before the function is done evaluating, resulting in undefined. Local tests with the same alg and input yield the correct result (frequently when n = 57167).