Pattern making

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You have 3 characters {'a','b','c'}. You want to construct string of length of $n$ such that strings should follow below 2 property. - Each character of string must be either 'a' or 'b' or 'c'. - Consecutive characters of string should not be same. For example, If n = 1, then possible strings are {"a","b","c"} If n = 2, then possible strings are {"ab","bc","ac","ba","ca","cb"} N

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solution.cppC++17

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