Rahul and Puzzle

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Rahul is good at mathematics. So one day Tarun decided to test his skills and gives him a puzzle to solve. and Puzzle is that There is a rope of length $N$ centimeter. You have to cut the segments of rope but only in integer units. At least one cut is necessary. You have to find out the total way in which the rope can be cut. Since Rahul is unable to solve that puzzle, so Help Rahul to solve that

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solution.cppC++17

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