[AtCoder] You are given three words s_1, s_2 and s_3, each composed of lowercase English letters, with spaces in between. - 题解

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题目信息
题号 P18610
标题 [AtCoder] You are given three words s_1, s_2 and s_3, each composed of lowercase English letters, with spaces in between.
难度 普及-
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