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不要说得这么复杂,简单说

Posted by 201041843228 at 2014-08-22 13:16:16 on Problem 2470
不要说什么“新的排列中第i个数是旧的排列中数i(在旧的排列中)的位置。。。”云云,其实容易解释:

就是新旧位置和数字的互换!比如,原来的数字和位置(位置用[]框起来)是:
 2   3   4   5   1
[1] [2] [3] [4] [5]

-->

 5   1   2   3   4
[1] [2] [3] [4] [5]

原来2在位置[1],现在1在位置[2]。。。以此类推,不知道为什么你们要说得这么麻烦


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