Different Colored Pens

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You are given a set of n pens, each of them can be red, blue, green, orange, and violet in color. Count a minimum number of pens that should be taken out from the set so that any two neighboring pens have different colors. Pens are considered to be neighboring if there are no other pens between them. ###Input: - The first line contains t denoting the number of test cases. - The first line

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solution.cppC++17

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