420. Strong Password Checker

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A password is considered strong if the below conditions are all met: - It has at least 6 characters and at most 20 characters. - It contains at least one lowercase letter, at least one uppercase letter, and at least one digit. - It does not contain three repeating characters in a row (i.e., "Baaabb0" is weak, but "Baaba0" is strong). Given a string password, return the minimum number of steps

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solution.cppC++17

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