Simpler: answer = (x || 7) + 1

Dave

On Sep 25, 10:14 am, rajess <rajess1...@yahoo.com> wrote:
> scan last(left) 4 bits .if the bits are not 1000.make them 1000.else
> scan from left till u find first one(1).make this bit 1.and make
> last(left) bits as 1000

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