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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.
@LesRamer: Could you please review my JavaScript solution? I might have ended up with a solution of complexity lengthOfNumer^3 that only takes 5 ms for the 900000001 problem (~700 iterations). I can't believe that's true, though... :-) Thanks!
https://www.codewars.com/kata/reviews/5660c9c5bac7553ac60000a9/groups/5e2f0eb091a2ce00011b0cb3
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This comment is hidden because it contains spoiler information about the solution