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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.
You should check your Big O Notation (O) of your algorithm, if it is O(n^2) then your code will got an erro timed out.
The complex of algorithm should be O(n) or O(nLog(n))
That's not a kata bug, it's your code's problem: