Lucky string

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Problem description. Lets call a string which is composed of only 5 and 8 a Lucky String. For example, 58, 555, 55855 are all Lucky Strings of length 2, 3 and 5 respectively, while 33, 474 are not Lucky Strings. Now, consider a sorted list of all the Lucky Strings that can be formed where the sorting is done by the following rule: A string a comes before string b if either length(a) Input Inp

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solution.cppC++17

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