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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.
spoiler flag, guys...
This comment is hidden because it contains spoiler information about the solution
its kinda like doing maths how you were taught to do it at school by looping through each digit
It is not O(n^2). He's using the same counter to grab the range. It is just O(n).
If mx = 2, then gap(3, 5, 6) return [2, 5], but 2 isn't between 5 and 6.
I believe that the correct way is to write 'mx && m - mx === g'