求助点分治模板，代码在第四个点莫名WA……

P3806 【模板】点分治 1

@[dО_while_true](/user/334223) %%%%
by Refined_heart @ 2021-07-05 16:27:36

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@[Refined_heart](/user/128591) @[dО_while_true](/user/334223) %%%%%%
by MeowScore @ 2021-07-05 16:32:30

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