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貌似解题报告的方法比较多余 其实不用DIST值 直接修改边上的权 然后暴力LCA 可以不用线段树 时间 空间 编程复杂度都低得多 本人两种都做了 有兴趣的可以去看看我的提交结果 貌似解题报告的方法有点定势的感觉了见上 Followed by:
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