Problems/7. BFS Queue Mechanics
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7. BFS Queue Mechanics

EasyQueueBFSFIFO

Understand the fundamental mechanics of a First-In-First-Out (FIFO) queue as it is used during a Breadth-First Search (BFS). In BFS, neighboring nodes are discovered and added to the back of the queue (enqueue), and then processed one by one from the front (dequeue). This ensures nodes are explored level by level in order of their distance from the source.

Example 1
Input: elements = [10, 20, 30, 40, 50]
Output: processed = [10, 20, 30, 40, 50]
Each element is enqueued in sequence. Dequeuing them from the front retrieves them in the exact same order: 10, then 20, 30, 40, and finally 50.
Example 2
Input: elements = [5, 15, 25]
Output: processed = [5, 15, 25]
A smaller stream of numbers, demonstrating the same FIFO behavior.
Example 3
Input: elements = [1, 2]
Output: processed = [1, 2]
The queue processes 1 first, then 2, in order of insertion.
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