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题意

Posted by 5D6D at 2012-08-06 17:56:37 on Problem 3032
给你n张牌,让你变一个魔术:第1次把上面的1张牌放到底部,然后最上面的牌就是1,然后拿走1。第2
次把上面的2张牌依次放到底部,然后最上面的牌就是2,然后拿走2....重复这个过程,直到所有的牌
都被拿走。问一开始的牌应该从上到下怎么放,才能完成这个魔术。

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