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本来我还不信要倒着搜....

Posted by 416221843 at 2018-03-08 23:03:01 on Problem 2676
正这搜TLE 倒过来就79msAC..
而且试了下评论区里的数据,正这搜十几秒没结果,倒着搜2秒出结果....
什么原理..讲道理对于足够多的随机数据,正反应该差不多的毕竟对称。。

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