No Odds Please

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#Problem Statement: Mr Walter White is trying to make a new chemical compound. He figured out that all the elements in his compound should occur even number of times. But there is one element (with atomic number x) that has occurred odd number of times. Mr. White wants to remove that element from his compound but he is too busy dealing with other problems so he asks you for help. Help Mr. White.

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solution.cppC++17

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