@navin and @atul: inorder traversal without recursion and stack can be done using Morris traversal in O(1) space.
Refer the following link for Morris traversal http://www.geeksforgeeks.org/archives/6358 now the problem takes O(n) time and O(1) space. -- 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.