刚学OI的萌新求助，-1的判断由于数据点没有懒得加了。样例没过。

P3957 [NOIP2017 普及组] 跳房子

救救孩子
by Cwling @ 2019-10-03 17:53:44

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~~管管家长~~
by congxia @ 2019-10-07 11:11:31

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mid=(l+r+1)/2
by LiJianZhu @ 2019-10-10 21:30:24

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事实上是初始化出问题了。
by Cwling @ 2019-10-11 23:23:41

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