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北京大学暑期课《ACM/ICPC竞赛训练》面向全球招生!

Re:关于数学原理的分析

Posted by witstorm at 2018-05-15 10:46:49 on Problem 1063
In Reply To:关于数学原理的分析 Posted by:CatLovers at 2013-11-02 11:00:03
就是这么个原理,不证自明
可能大家对奇数一定可以不太理解,我再简单解释下,因为如果是奇数,则小球可以变换到任意位置,不要跟我扯什么这个黑球和那个黑球不一样

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