John Snow and his army

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Problem Description : John Snow wants to solve a problem.(Spoiler Alert :- He didn't die in GOT Season 3... XD). There is an army of N soldiers for which he wants to find all the soldiers having positive energy only. Here, positive energy signifies the positive(non-negative) integer in the array and negative energy signifies the negative integer in the array(array denotes the energy of N soldiers

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solution.cppC++17

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