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Solution: Implement Breadth-First Search

Understand how to perform a breadth-first search (BFS) on a directed graph starting from a specific source vertex. This lesson guides you through managing visited vertices to avoid cycles, using a queue for traversal, and understanding the time and space complexity of the BFS approach.

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Statement

Given a directed graph represented as an adjacency list, graph, and an integer, source, which is the starting vertex number, return an array of integers, result, that contains the order of the graph’s breadth-first traversal starting from the source vertex.

Constraints:

  • 11 \leqgraph.length \leq ...