LeetCode 0144 - Binary Tree Preorder Traversal

Parent index: LeetCode 500 Problem Index MOC

Problem Metadata

• LeetCode URL: https://leetcode.com/problems/binary-tree-preorder-traversal/
• Frontend ID: 144
• Difficulty: Easy
• Primary category: Trees
• Source lists: NeetCode Practice, NeetCode 250

Related Algorithms

• Trees
• Binary Tree
• Tree Traversals

Research Status

• Problem statement and constraints verified against the LeetCode page.
• Core algorithm explained in paper-style prose.
• Worked examples, edge cases, complexity proof, and pitfalls added.
• Solution variants linked back to the relevant algorithm notes.

See Also

• LeetCode 500 Problem Index MOC
• SWE Interview Preparation MOC