What is the fastest shortest path algorithm for unweighted graphs?

BFS. It levels out perfectly, finding minimal steps first — ideal for mazes and ladders.

When should I use Dijkstra vs Bellman-Ford on LeetCode?

Dijkstra for positive weights (priority queue magic). Bellman-Ford for negatives or when you're short on heap time — just relax edges V-1 times.

Does Floyd-Warshall work for single-source shortest paths?

Yes, but it's overkill — O(V^3) blasts all-pairs. Use it only if the problem demands every node pair.

🤝 Community & Governance

LeetCode's Graph Maze: Pick BFS, Dijkstra, or Bellman-Ford Before You Code

LeetCode hides graph nightmares in mazes, flights, and word ladders. Here's your no-BS guide to picking the perfect shortest path algorithm — every time.

theAIcatchup Apr 11, 2026 4 min read

Colorful graph network with glowing shortest path from start to end node

⚡ Key Takeaways

Spot graph type first: unweighted screams BFS, positive weights Dijkstra. 𝕏
Bellman-Ford hack skips priority queues — interview lifesaver for negatives. 𝕏
These algos power AI agents; master now for the platform shift ahead. 𝕏

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theAIcatchup

Community-driven. Code-first.

#Bellman-Ford #Dijkstra #Dijkstra algorithm #LeetCode graphs #bfs #shortest path algorithm

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Originally reported by Dev.to

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