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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.
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would be fit here as you don't mutate variables hereI think you meant O(logN), not O(NlogN) as for sort algorithm
This is better than sort algorithm though
And you cannot find a way to get the place where the value is different so it cannot be O(logN)