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Grokking the Coding Interview Patterns in Python

Binary Tree Preorder Traversal

Explore how to perform preorder traversal on a binary tree by visiting nodes in the correct order. Understand problem constraints, practice logical sequencing, and implement the traversal method to develop your grasp of tree depth-first search techniques.

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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 ...