Replace X with -X

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An array and sum of all elements of the array was stored in a hard disk. Unfortunately due to a bug some elements of the array got modified. Owner of the hard disk said that this issue happens with him often. He also claimed that the bug chooses any element present in the array and then multiplies all occurrences of that element in the array by -1. i.e bug chooses any element present in the array

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solution.cppC++17

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