摘要: [BZOJ2654]Tree 题目来源: "[BZOJ2654]Tree" "[HDU4253]Two Famous Companies" "[SPOJ COMPANYS]Two Famous Companies" 题目大意: 一个$n(n\le5\times10^4)$个点$m(m\le10^5) 阅读全文
posted @ 2018-07-16 08:50 skylee03 阅读(193) 评论(0) 推荐(0) 编辑