A - Takahashi san 2 Problem Statement KEYENCE has a culture of addressing everyone with the suffix “-san,” regardless of roles, age, or positions. You are given a string S consisting of lowercase English letters. If S ends with san, print Yes; otherwi…

http://cplusoj.com/d/senior/p/NODSX2303C 我以前写的半篇题解：https://blog.csdn.net/zhangtingxiqwq/article/details/135612739 我们现在要求一个 n n n 个点 m m m 条边的图的最大团，等价于求补图的最大独立集。 由于补图满足偏序关系&#xf…