分数规划
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##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)
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