Monica Loves Arrangements

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Monica gets gifts for the Christmas party, some of them are wrapped in red packing paper and some in blue. Being a perfectionist, she wants to arrange these gifts in a row such that no two adjacent gifts are the same in color. Given that there are $N$ gifts which are red in color and $M$ gifts which are blue in color. Help Monica to find out the total number of ways in which she can arrange t

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solution.cppC++17

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