[AtCoder] Tak has N cards. On the i-th (1 \leq i \leq N) card is written an integer x_i. - 题解

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题目信息
题号 P18711
标题 [AtCoder] Tak has N cards. On the i-th (1 \leq i \leq N) card is written an integer x_i.
难度 普及-
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