Algorithm for finding internally connected cluster of nodes within a graph from which no edge points outwards
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30-10-2019 - |
Вопрос
I am representing my graph as a adjacency list. I want to know how can I find a cluster of nodes which are internally connected but no edge points outwards from them. Is there any well known algorithm out there which I can use?
for e.g.This is my graph.
1---->2
2---->1
2---->3
3---->1
3---->4
4---->5
5---->4
Here nodes 4 and 5 are internally connected. Yet no outside edge comes from this. This would be my answer. Similarly nodes 1,2,3 even though they form a cycle, do not fit the criteria as an outside edge emanates from node 3. So it is not same as finding a cycle in a adjacency list.
Optional read: (why I need this) I am working on a Ranking page (search engine) algorithm, nodes like 4 and 5 are called rank-sink.
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