Solution: Binary Tree Level Order Traversal

Explore how to implement binary tree level order traversal using breadth-first search patterns. This lesson teaches you to process nodes level by level using queue structures, compare naive and optimized approaches, and understand time and space complexities. You will learn two efficient BFS-based solutions that showcase practical tree traversal techniques applicable in coding interviews.

We'll cover the following...

Statement
Solution
- Naive approach
- Optimized approach using tree breadth-first search
  - Solution 1
  - Solution 2

Solution

So far, you’ve probably brainstormed some approaches and have an idea of how to solve this problem. Let’s explore some of these approaches and figure out which one to follow based on considerations such as time complexity and any implementation constraints.

Naive approach

The naive approach would be to first calculate the height of the tree and then recursively traverse it, level by level. The printing function would be called for every level in the range $[1, height]$ ...

Solution: Binary Tree Level Order Traversal

Statement

Solution

Naive approach