摘要: \(\text{Problem}:\)[ARC117D] Miracle Tree \(\text{Solution}:\) 考虑 \(\lvert E_{i}-E_{j}\rvert \geq dist(i,j)\) 的意义,令 \(E_{i}<E_{j}\),即在树上选择一条 \(i\right 阅读全文
posted @ 2021-07-07 12:01 zkdxl 阅读(61) 评论(1) 推荐(1) 编辑