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看不懂题的进来,不要再受苦了。

Posted by techird at 2010-10-07 16:28:57 on Problem 3210
有n个硬币,不管原本朝向如何,都能保证k次翻动之后,全部硬币朝向相同。问这个k最小是多少。

明白了题意之后,推导就不难了...

bs eng~~~lish

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