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Solution: Binary Tree Preorder Traversal

Explore how to implement a binary tree preorder traversal using the Morris traversal technique. Understand how this method visits nodes in root-left-right order while optimizing space by reusing tree pointers, eliminating the need for recursion or an explicit stack. This lesson helps you grasp the approach and analyze its time and space complexity.

Statement

Given the root of a binary tree, your task is to return a list containing the values of its nodes in preorder traversalIn preorder traversal, we visit each node by first visiting the current node, then its left subtree, and finally its right subtree order.

Constraints:

  • The number of nodes in the tree is in the range [0,100] ...