@sanjay why you have compared k with sum/2 is it a general solution..??? On Sun, Aug 21, 2011 at 11:11 PM, vaibhav shukla <vaibhav200...@gmail.com>wrote:
> @sanjay : yes this is one approach . just doing this and keeping track of > the smaller element and wen k is sum/2, the minimum element of the middle on > > true. but any other approach apart from this and wat if the total length is > even, i.e u have to give two middle elements then > > > On Sun, Aug 21, 2011 at 11:09 PM, vaibhav shukla > <vaibhav200...@gmail.com>wrote: > >> @puneet : but u cant use extra memory >> >> >> On Sun, Aug 21, 2011 at 11:08 PM, Sanjay Rajpal <srn...@gmail.com> wrote: >> >>> Take three pointers to the beginning of each array say i,j,k. >>> >>> Now let sum = len a +len b + len c. >>> k=0 >>> >>> now start from the beginning, compare elements at indexes i,j,k. >>> which ever is smaller, increment that index and k, continue till k >>> becomes sum/2. >>> >>> when k becomes sum/2, this element will be middle element of the merged >>> array. >>> >>> I think it could also be done in O(log m + log n + log p), where m, n,p >>> are lengths of the arrays. >>> >>> Correct me if m wrong :) >>> Sanju >>> :) >>> >>> >>> >>> On Sun, Aug 21, 2011 at 10:34 AM, Puneet Chawla < >>> puneetchawla...@gmail.com> wrote: >>> >>>> Here by just applying merge on these array as they are sorted and >>>> calculate the middle element..Am i rt..??? >>>> >>>> >>>> On Sun, Aug 21, 2011 at 10:59 PM, vaibhav shukla < >>>> vaibhav200...@gmail.com> wrote: >>>> >>>>> given three sorted arrays not necessary of same length (length is >>>>> given) >>>>> we have to determine the middle element such that the element will be >>>>> the middle one of the such an array which will be formed if all three >>>>> given >>>>> arrays are merged in >>>>> sorted order. >>>>> input :- arr1 : 1,3,5,7 >>>>> arr2 : 6,9,12,15,18 >>>>> arr3 : 2,4,14,20 >>>>> output : 7 , as if we merge the arrays in sorted order then 7 will be >>>>> the middle element of that merged array. >>>>> note : if merged array is of even length then there will be two middle >>>>> element. >>>>> >>>>> ALSO YOU CANNOT USE EXTRA MEMORY. >>>>> >>>>> >>>>> -- >>>>> best wishes!! >>>>> Vaibhav >>>>> >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Algorithm Geeks" group. >>>>> To post to this group, send email to algogeeks@googlegroups.com. >>>>> To unsubscribe from this group, send email to >>>>> algogeeks+unsubscr...@googlegroups.com. >>>>> For more options, visit this group at >>>>> http://groups.google.com/group/algogeeks?hl=en. >>>>> >>>> >>>> >>>> >>>> -- >>>> With regards >>>> ............ >>>> Puneet Chawla >>>> Computer Engineering Student >>>> NIT Kurukshetra >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Algorithm Geeks" group. >>>> To post to this group, send email to algogeeks@googlegroups.com. >>>> To unsubscribe from this group, send email to >>>> algogeeks+unsubscr...@googlegroups.com. >>>> For more options, visit this group at >>>> http://groups.google.com/group/algogeeks?hl=en. >>>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to algogeeks@googlegroups.com. >>> To unsubscribe from this group, send email to >>> algogeeks+unsubscr...@googlegroups.com. >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >> >> >> >> -- >> best wishes!! >> Vaibhav >> MCA >> >> > > > -- > best wishes!! > Vaibhav > MCA > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algogeeks@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- With regards ............ Puneet Chawla Computer Engineering Student NIT Kurukshetra -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
