i guess can be done using binary indexed tree.

On Thu, Feb 9, 2012 at 2:07 PM, Prakhar Jain <[email protected]> wrote:

> But in this post, we don't have prior information about what can be
> possible majority element.
>
> According to my question, we know that either x is the majority element or
> there is no majority element.
> Can we use that information to reduce complexity to O(log n)..???
>
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