[HackerEarth] You have N numbers from 1 to N. Now Permutations of N numbers of having length N means Reorder all numbers in all possible orders. Like for N=3 , - 题解

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题号 P14012
标题 [HackerEarth] You have N numbers from 1 to N. Now Permutations of N numbers of having length N means Reorder all numbers in all possible orders. Like for N=3 ,
难度 普及
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