Captain and his Shield

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Captain America has requested Tony for a new shield with a different shape to experiment with. Tony decided that he will build a triangular shield for Captain. He first decided to build the traingular frame of the shield. To do so, he has n segments of Vibranium steel alloy, the i-th of them has a length Ai. Since Vibranium is a rare substance, Tony can use exactly 3 segments out of n, such that t

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solution.cppC++17

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