摘要: 参考资料: https://www.luogu.com.cn/blog/Karry5307/eulerian-numbers https://www.cnblogs.com/mengnan/p/9307521.html 欧拉数:\(\langle\begin{matrix}n\\ k\end{mat 阅读全文
posted @ 2021-04-25 19:40 jz_597 阅读(319) 评论(0) 推荐(0) 编辑