Solution: Binary Tree Preorder Traversal
Explore how to implement preorder traversal of a binary tree using depth-first search without recursion or extra stack space. This lesson teaches the Morris traversal technique to visit nodes in root-left-right order by temporarily modifying tree pointers, optimizing space to O 1 while maintaining O n time complexity.
We'll cover the following...
We'll cover the following...
Statement
Given the root of a binary tree, your task is to return a list containing the values of its nodes in
Constraints:
The number of nodes in the tree is in the range
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