A graph is regular if every vertex has the same degree.
如果一个图的每个顶点都具有相同的度数，则称它是正则图。
This happens if the graph is disconnected or has a cut vertex.
如果一个图是不连通的或有割点，就发生这种情况。
A graph is regular if every vertex has the same degree.
如果一个图的每个顶点都具有相同的度数。
A graph is regular if every vertex has the same degree.
如果一个图的每个顶点都具有相同的度数。
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