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Grokking the Coding Interview Patterns in Python

Solution: Binary Tree Preorder Traversal

Explore the implementation of binary tree preorder traversal using a space-optimized Morris traversal technique. Understand how to visit nodes in root-left-right order without recursion or extra stacks, improving both time and space efficiency for interview-level tree problems.

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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] ...