Maintain Mean

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Chef has an array $a$ of $n$ integers. Mathematic mean of array elements is $k$ (may or may not be an integer). Mathematic mean of an array of $n$ elements is the sum of elements divided by the number of elements ($n$). Chef wants to reduce the array by deleting exactly two elements from array such that mathematic mean of remaining $(n-2)$ elements is still equal to $k$. Your task is to find nu

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solution.cppC++17

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