是不是双向建边，然后这个数组空间要开两倍
by AlanJoker @ 2023-08-13 21:03:21
@[Cat_of_Turing](/user/767295) 是的，你自己试试也能发现
by wang_freedom @ 2023-08-13 21:18:57
@[wang_freedom](/user/753818) OK，谢谢。此帖结！
by AlanJoker @ 2023-08-13 21:19:52