摘要: 显而易见的,后切断的蚯蚓对$\{a_i,a_j\}$一定比先切断的蚯蚓对$\{b_i,b_j\}$小.即: $$ \begin{align} a_i define il inline define rg register define gi read define mp make_pair usin 阅读全文
posted @ 2019-10-18 22:02 wuhan2005 阅读(74) 评论(0) 推荐(0) 编辑