手动开O3的勇士……
by dbxxx @ 2020-03-10 21:19:07
唉但还是T了(大佬有没有良策?)
by lzqy_ @ 2020-03-10 21:27:46
用网络流ISAP(速度快到你停都停不下来)
by 洛谷Onlinejudge @ 2020-08-12 22:59:33
用邻接表试试
by Makerlove @ 2023-10-21 10:23:17