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Grokking the Coding Interview Patterns in JavaScript

Solution: Binary Tree Preorder Traversal

Explore the Morris traversal approach to solve binary tree preorder traversal without recursion or a stack. Learn how to traverse the tree in root-left-right order efficiently while restoring tree structure. Understand the algorithm’s linear time complexity and constant space usage for optimized binary tree processing.

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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] ...