Write a non-recursive traversal of a Binary Search Tree using constant space and O(n) run time

Question

This is not homework, this is an interview question.

The catch here is that the algorithm should be constant space. I\'m pretty clueless on how to d

Answer 1

We can traverse the binary tree without modifying the tree itself (provided nodes have parent pointer). And it can be done in constant space. I found this useful link for the same http://tech.technoflirt.com/2011/03/04/non-recursive-tree-traversal-in-on-using-constant-space/