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Grokking the Coding Interview Patterns in Go

Solution: Binary Tree Preorder Traversal

Explore how to perform preorder traversal of a binary tree using a space-optimized Morris traversal approach that leverages tree pointers to avoid recursion or stacks while maintaining O(n) time complexity. Understand the step-by-step process of visiting nodes in root-left-right order and restoring tree structure post-traversal.

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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] ...