@[nakanomikuaini](/user/947892)
@[liuyize549330](/user/947881)
by ztyo_zysclown @ 2024-04-08 18:56:12
反向建边求回去的路
by nakanomikuaini @ 2024-04-08 18:59:07
@[nakanomikuaini](/user/947892) 为什么不能直接乘2
by come_on_gqw @ 2024-04-09 17:24:02
@[come_on_gqw](/user/1262300) **单向边**啊。
by LYRT_Subway @ 2024-04-12 21:32:49