摘要: 直接推生成函数,即 $$\begin{align}F(z)&=\frac{1}{1-z^2}\cdot(1+z)\cdot(1+z+z^2)\cdot\frac{z}{1-z^2}\cdot\frac{1}{1-z^4}\cdot(1+z+z^2+z^3)\cdot(1+z)\cdot\frac{1 阅读全文
posted @ 2019-01-03 01:24 sjkmost 阅读(204) 评论(0) 推荐(0) 编辑