1096. Brace Expansion II
Under the grammar given below, strings can represent a set of lowercase words. Let R(expr) denote the set of words the expression represents. The grammar can best be understood through simple examples: - Single letters represent a singleton set containing that word. - R("a") = {"a"} - R("w") = {"w"} - When we take a comma-delimited list of two or more expressions, we take the union of poss
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solution.cppC++17
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