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Grokking the Coding Interview Patterns in C++

Binary Tree Preorder Traversal

Explore how to implement binary tree preorder traversal by visiting the current node first, then recursively traversing its left and right subtrees. Understand this key depth-first search technique essential for solving tree-based coding 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 ...