if value in array  is in something like millions..
then bit variable shud be having millions bits.... rite ???
means bits variable = pow(2,millions) rite... ??
result:- not possible..

for n=4
1,1000000000000000000000000,2,2

then think .. ??




On Mon, Aug 17, 2009 at 5:32 AM, Shyam <shyamheartbreak...@gmail.com> wrote:

>
> I think I could do it in O(n) .
>
> var bits=0
> var @array
>
> for each i in array
>    if (bits & i)!=0
>          return i
>    else
>          bits=bits | i;
>    end if
> end for
>
> I just use the pattern for powers of two
>
> let array be 2,4,2
>
> so first
> bits=0 i=2     so bits(000) & i(010) is 0 so bits= bits | i which is
> bits=010
> next
> bits=2 i=4     so bits(010) & i(100) is 0 so bits= bits | i which is
> bits=110
> next
> bits=6 i=2     so bits(110) & i(010) is 2 which is !=0 so we return i.
>
> I think that should be it.
>
> >
>

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