[AtCoder] Given are an integer N and four characters c_{\mathrm{AA}}, c_{\mathrm{AB}}, c_{\mathrm{BA}}, and c_{\mathrm{BB}}. - 题解

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题目信息
题号 P17694
标题 [AtCoder] Given are an integer N and four characters c_{\mathrm{AA}}, c_{\mathrm{AB}}, c_{\mathrm{BA}}, and c_{\mathrm{BB}}.
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