Introduction to Tree Breadth-First Search
Explore the tree breadth-first search (BFS) pattern to understand how to traverse trees level by level starting from the root node. Learn BFS key features, its traversal logic using a queue, and apply this method to solve common coding interview problems involving trees. This lesson helps you identify when BFS is suitable and understand its real-world applications such as file system analysis and DOM tree traversal.
We'll cover the following...
About the pattern
A tree is a graph that contains the following properties:
It is
undirected A graph with edges that do not have a specific direction assigned to them. It is
acyclic A graph without cycles. It is a connected graph where any two vertices are connected by exactly one path.
Its nodes can contain values of any data type.
The following key features set trees apart from other data structures, such as arrays or linked lists:
They organize data in a hierarchical manner with a root node at the top and child nodes branching out from it.
They are nonlinear, which means that the elements in a tree are not arranged sequentially but rather in a branching structure.
The time complexity for search and insert operations is typically
...