Tree Breadth-first Search: Introduction

Let’s go over the Tree Breadth-first Search pattern, its real-world applications, and some problems we can solve with it.


Tree breadth-first search is an important tree traversal algorithm for finding a node in a tree that satisfies the given constraints. It starts searching at the root node and moves down level by level, exploring adjacent nodes at level k+1k + 1.

Essentially, it first visits nodes that are one edge away from the root, followed by nodes that are two edges away, and so on. This helps in efficiently finding neighbor nodes, particularly peer-to-peer networking systems.

Here’s how breadth-first search in a tree works:

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