Attack of the aliens

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There is a country which recently got invaded by a fleet of aliens. They started living with the people there. Relations between the aliens and humans were generally bitter. The government at the center decided that they will divide the country into 2 states (initially there were none). There are N citizens in the country; the aliens are denoted by -1, while the humans are denoted by 1. You are a

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solution.cppC++17

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