Rajeev and Beautiful Row

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There are N students in a row, some Student are facing right and some left. Rajeev thinks the row will look good if all the students will face in the same direction. In one step you can move any one segment of consecutive Students. After moving a segment, all students facing right will face toward left and vice versa In how many minimum number of steps students will face in the same direction?

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solution.cppC++17

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