[AtCoder] We have two permutations P and Q of size N (that is, P and Q are both rearrangements of (1,~2,~...,~N)). - 题解

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题目信息
题号 P19543
标题 [AtCoder] We have two permutations P and Q of size N (that is, P and Q are both rearrangements of (1,~2,~...,~N)).
难度 普及-
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