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点分治的acwing的树那题代码有点点bug #83

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yuanz4 opened this issue Feb 12, 2023 · 1 comment

yuanz4 commented Feb 12, 2023

这个解答，这里第75行的s[y]是在找树的重心时求出来的，是以x（假定的根）为根时每个子树的大小，并不是以真正的重心为根时的子树大小，所以这个s应该是错的，得要以pos为根重新求。可以在dfs的那个function里面求

验证过了，work中的S确实不能反映子树真正的大小

tabbbbbb commented Feb 12, 2023 via email

您好，您的邮件已收到，谢谢！

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