[AtCoder] Snuke and Raccoon have a heap of N cards. The i-th card from the top has the integer a_i written on it. - 题解

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题目信息
题号 P13968
标题 [AtCoder] Snuke and Raccoon have a heap of N cards. The i-th card from the top has the integer a_i written on it.
难度 普及-
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