Solve Minimum Multiplications to reach End with a clean BFS, modular math, and commented Python code. Easy steps, dry run,…
Browsing: BFS
Solve “Cheapest Flights Within K Stops” (LeetCode 787) in plain Python using a BFS queue and a cost array. Learn…
Find the shortest clear path from the top-left to bottom-right of a 0-1 grid. We explain the intuition, walk through…
Find the Shortest Path in an Undirected Graph from a source to every other node when every edge costs 1.…
We flip the graph, run Kahn’s topological BFS, and list every node guaranteed to avoid cycles. Includes clear intuition, step-by-step…
Check if you can finish every course when some need to be done first. We build the course graph, run…
Learn how to detect cycle in a directed graph with Kahn’s algorithm. Simple intuition, commented Python code, step-by-step dry run,…
Learn how to perform topological sorting of a DAG using Kahn’s algorithm (BFS based). Clear steps, commented Python code, dry-run…