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Breadth First Search: Shortest Reach
Breadth First Search: Shortest Reach
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Here's a PHP solution for the "Breadth First Search: Shortest Reach" problem on HackerRank. This implementation uses a BFS algorithm to find the shortest path in an unweighted graph.
Explanation
Graph Initialization:
Distance Initialization:
distances
array is initialized to store the shortest distance from the start nodes
to each node. It is initially set to -1 for all nodes to indicate they are unvisited, and 0 for the start node.BFS Implementation:
Result Preparation:
Input Handling:
This solution reads input directly from
php://stdin
and is designed to be run in a competitive programming environment where inputs are provided in a specific format. For testing locally, you might need to modify the input handling part to use hardcoded values or read from a file.C++ (more at https://github.com/IhorVodko/Hackerrank_solutions , feel free to give a star:) )
JAVA 15
It took me some time to realize that the edges are Bidirectional.