Connecting Soldiers

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To protect people from evil, a long and tall wall was constructed a few years ago. But just a wall is not safe, there should also be soldiers on it, always keeping vigil. The wall is very long and connects the left and the right towers. There are exactly N spots (numbered 1 to N) on the wall for soldiers. The Kth spot is K miles far from the left tower and (N+1-K) miles from the right tower. Give

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solution.cppC++17

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