洛谷P3663 [USACO17FEB]Why Did the Cow Cross the Road III S解题报告

Why Did the Cow Cross the Road III S P3663 [USACO17FEB]Why Did the Cow Cross the Road III S 技术统计 难度:提高+/省选- 用时:半天 提交次数:5 unaccept 次数:3 ac次数:2 题意概括 已知一个n*n的网格图,k头牛,s条路。每条路将其相邻的两个格间隔(不能互通),询问有多少对牛不能相互到达
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