Maximum Value

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Given an array $A$ of size $N$. Find the maximum value of the expression $a * b + a - b$ where $a$ and $b$ are $2$ distinct elements of the array. ###Input: - First line will contain $T$, number of testcases. Then the testcases follow. - Each testcase contains of two lines of input. - First line will contain $N$, number of elements of the array. - Second line contains $N$ space separate

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solution.cppC++17

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