DSA Pattern: Breadth First Search
BFS for shortest paths and level-order traversal
Pattern Overview
When to Use
- Shortest path (unweighted)
- Level-order traversal
- Multi-source problems
- State space search
Benefits
- Guarantees shortest path
- Natural for levels
- Queue-based
- Complete algorithm
Example Problems
Binary Tree Level Order
Layer by layer traversal
Word Ladder
BFS on string graph
Rotting Oranges
Multi-source BFS
Practice Exercises
Step-by-step solutions, code implementations, and visualization diagrams will be available here soon.