bzoj 4997: [Usaco2017 Feb]Why Did the Cow Cross the Road III
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题意:
给你一个n*n的地图
某对相邻的点中间有墙。
然后给你n个坐标,问你有多少对坐标不可以互相到达。
题解:
至今为止,提交记录就只有1个WA的……
随便暴力做一下就好了。
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