Graph - Algorithms

Graph
- Map> graph
- Map indegree

- Topological Sort O(V+E)
-

LeetCode 444 - Sequence Reconstruction

LeetCode 399 - Evaluate Division
- Map> graph: nodeA -> nodeB (lable value)
- DFS 
- BFS

- Map> graph
- isStronglyConnect


Leetcode 200: Find the number of islands
- BFS or DFS
- UF 

LeetCode 127 - Word Ladder I
- beginSet, endSet, visited
- while (!beginSet.isEmpty() && !endSet.isEmpty())

LeetCode 133 - Clone Graph
- Map map: original node -> clone node
- BFS
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