树剖求调（被 master test 卡掉了）

SP6779 GSS7 - Can you answer these queries VII

https://www.luogu.com.cn/record/90169509 ？
by EastSnowLotus @ 2022-10-16 14:45:41

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好吧实际上挂在 test#1 了？
by EastSnowLotus @ 2022-10-16 14:46:30

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石锤：wssb
by EastSnowLotus @ 2022-10-16 14:53:01

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