[AC，你数组小了](https://www.luogu.com.cn/record/113473729)
by mori_ @ 2023-06-28 19:08:50
@[oiyang](/user/856309) 以后看见RE先把数组开大几倍，链式前向星注意是双向边还是单向的，双向要×2
by mori_ @ 2023-06-28 19:09:54
好的！感谢！
by oiyang @ 2023-06-28 19:52:36