分数规划

--- ##习题## - [【bzoj4898】[Apio2017]商旅](https://gitee.com/vsejgfb/codes/wyl7v9z8bx5p06dn2sthc36) - [【bzoj1690】[Usaco2007 Dec]奶牛的旅行](https://gitee.com/vsejgfb/codes/evugap0kl3ojzws5bi84638) - [【bzoj4819】[Sdoi2017]新生舞会](https://gitee.com/vsejgfb/codes/xq8jnte5dsu1mhvcf4gy368) - [【bzoj2402】陶陶的难题II](https://gitee.com/vsejgfb/codes/hekbfmvupin6r9woa18xg71) ---