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.
