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Re:有是一道没有交代清楚的题目。。。

Posted by Los_Angelos_Laycurse at 2014-03-27 10:53:41 on Problem 2401 and last updated at 2014-03-27 10:55:42
In Reply To:有是一道没有交代清楚的题目。。。 Posted by:Los_Angelos_Laycurse at 2014-03-27 10:52:49

> s和t算不算 chain 的一部分，也就是开区间还是闭区间木有交代。。。。。
下数据的网址貌似也挂了，相当蛋疼啊，数据很难出。。。。。

按开区间算BloodMage给的第二组数据应该是NO,闭区间的话是YES，(关键点就在端点4能不能被端点5看见。。。)

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