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Problem 1117 >> 不太理解这个题的贪心......
altria233 @ 2018-10-10 15:13:14
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为什么一个剩余覆盖距离为$d$的点(非根节点)要去覆盖距离为$d-1$和$d$的点,贪心的话不应该只去覆盖距离为$d$的点,把其余的交给父亲覆盖吗=。=
BriMon @ 2018-10-18 14:35:52
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Orz%%%
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