查找一个有向网络的头节点和尾节点

状态	递交者	时间	内存	语言	代码	递交时间
AC	很简单刚好	3068ms	27.4 MiB	Java	2.2 KiB	2024-6-1 10:34:16
AC	lurod	3068ms	27.1 MiB	Java	3.5 KiB	2024-8-6 23:18:11
AC	ruibo	3077ms	27.3 MiB	Java	2.5 KiB	2024-7-19 9:26:30
AC	不呆萌	3091ms	26.9 MiB	Java	1.5 KiB	2024-9-2 15:22:19
AC	ReAllTh	3095ms	20 MiB	Java	1.7 KiB	2024-5-1 12:30:17
AC	sorajoshua	3099ms	21.4 MiB	Java	2.6 KiB	2024-3-30 16:42:01
AC	xiangzhiqiang	3107ms	20.2 MiB	Java	3.3 KiB	2024-3-21 18:04:12
AC	hulielie	3206ms	28.1 MiB	Java	2 KiB	2024-5-21 8:53:16
AC	orangecb	3260ms	27.4 MiB	Java	1.8 KiB	2024-5-4 9:47:45
AC	Moonss	3272ms	21 MiB	Java	3 KiB	2024-5-1 22:44:56
AC	orangecb	3273ms	27.3 MiB	Java	1.8 KiB	2024-5-3 14:25:48
AC	orangecb	3281ms	27.2 MiB	Java	1.8 KiB	2024-5-3 16:06:25
AC	wang893012105	3281ms	27.3 MiB	Java	2.6 KiB	2024-7-19 14:33:15
AC	orangecb	3301ms	26.5 MiB	Java	1.8 KiB	2024-5-3 14:47:49
AC	Dcpnet	3326ms	27.2 MiB	Java	3.7 KiB	2024-9-18 15:24:28
AC	Hedgehogp	3333ms	27.9 MiB	Java	1.9 KiB	2024-6-9 2:05:36
AC	liqingdu	3333ms	27.4 MiB	Java	2.8 KiB	2024-7-16 5:03:06
AC	Ij34	3419ms	27.8 MiB	Java	2.4 KiB	2024-6-9 1:13:01
AC	398310876	3507ms	27.8 MiB	Java	2 KiB	2024-8-19 16:06:04