Prasad and Lens

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Prasad wants to capture N flowers located at different distances from his camera. The camera has X units of battery remaining. To focus on a flower at distance D, the focal length is: F = (2/3) × D Changing the focal length from F1 to F2 consumes |F1 − F2| units of energy. Initially, the focal length is 0. Find the minimum energy required to capture all flowers. If the required energy exceeds

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solution.cppC++17

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