Cardinality

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You have a set of unique numbers. You are trying to find a subset of this set such that no two numbers in the subset have a common digit. There will of course be several such subsets. You are interested in the subset with the maximum sum. The sum of a subset is defined as the sum of the numbers in the subset. In fact, you are most interested in the cardinality - that is, the number of elements -

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solution.cppC++17

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