[AtCoder] There are N infants registered in AtCoder, numbered 1 to N, and 2\times 10^5 kindergartens, numbered 1 to 2\times 10^5. - 题解

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题目信息
题号 P15443
标题 [AtCoder] There are N infants registered in AtCoder, numbered 1 to N, and 2\times 10^5 kindergartens, numbered 1 to 2\times 10^5.
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