@shady :
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.22.5514&rep=rep1&type=pdf

it is not easy to merge sorted array inplace.
check this link..hope this help.

On Wed, Jan 11, 2012 at 4:53 PM, shady <[email protected]> wrote:

> any idea on how to merge two sorted arrays of size m and size n in O(m+n)
> time and without extra space ?
>
>
> On Wed, Jan 11, 2012 at 3:22 PM, Dipit Grover <[email protected]>wrote:
>
>> @ all k-way people : I dont get it how the complexity would be O(m*n) . I
>> just went through the algo and I feel that one would need to find the
>> minimum element among the head-elements of all individual row-arrays, for
>> all the resulting m*n elements. I say so since we may not necessarily have
>> a sorted column-array(array formed by taking the head elements of each
>> row-array) each time we look for the min element. Please correct me if I am
>> wrong.
>>
>> @Lucifer- yeah we need to only traverse the columns till the current
>> column.
>>
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