[HackerEarth] There are N men standing in a row.We can assign one of three color R(Red),G(Green) and Black(B) to each man. - 题解

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题目信息
题号 P20491
标题 [HackerEarth] There are N men standing in a row.We can assign one of three color R(Red),G(Green) and Black(B) to each man.
难度 普及
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