This is O(n) solution. first check if 2 consecutive element in an array are same or not . If they are same we have the solution. otherwise check the first 3 element and find out which 2 elements are same.
I hope it works. -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algoge...@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.