[AtCoder] An integer X is called a Harshad number if X is divisible by f(X), where f(X) is the sum of the digits in X when written in base 10. - 题解

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题目信息
题号 P17687
标题 [AtCoder] An integer X is called a Harshad number if X is divisible by f(X), where f(X) is the sum of the digits in X when written in base 10.
难度 普及-
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