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For each set of three distinct nonzero digits, consider the sum of all positive three-digit integers that can be formed by the digits. For example, for the three digits $$1$$, $$2$$, and $$3$$, the sum of all positive three-digit integers that can be formed by the digits is $$123 + 132 + 213 + 231 + 312 + 321 = 1,332$$. How many different integers are equal to such a sum?
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1.3.2 连续整数数个数
以上解析由 考满分老师提供。
