Vertex 에 대한 인접 정점 목록에 Vertex 가 있을까요, 아니면 Vertex가 있을까요? 당연히 Vertex입니다! Vertex에 있다는 것은 Vertex에 있다는 뜻입니다!

In the list of adjacent vertices for Vertex , would you have Vertex in the list, or Vertex? Vertex of course! Being at Vertex means being at Vertex!