@[chenjunming15432](/user/757101) 存边数组要开两倍
by TDoG_W @ 2023-11-07 22:00:24
@[chenjunming15432](/user/757101) 由于建反图，M 的大小应该是 2e5
by Cindy_Li @ 2023-11-07 22:00:43
谢了，已AC @[TDoG_W](/user/416578) @[Cindy_Li](/user/565091)
by junee @ 2023-11-07 22:02:08