询问的是系统的解吗
如果是的话那当然无解
by 日居月诸 @ 2020-12-05 22:44:56
有负环就无解
by 赵思铭 @ 2020-12-05 22:45:14
spfa有负环就无解
by MSqwq @ 2020-12-05 22:46:41