摘要: Well, better named 01 frac. P. When you want to know the maxinum of $\frac{\sum_ia_ix_i}{\sum_ib_ix_i}(x_i\in\{0,1\})$, you can suppose it as $r$. Now 阅读全文
posted @ 2018-09-23 23:37 Utoрia 阅读(157) 评论(0) 推荐(0) 编辑