Prefix sum

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You are given an array of $N$ integer. You have to answer $Q$ queries. Each query contains two integers $L$ and $R$ For each query print the sum of integers in array from index $L$ to $R$ ###Input: - First line will contain $T$, number of testcases. Then the testcases follow. - $T$ blocks of line follows- - First line of each block contains an integer $N$ (number of array elements). -

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solution.cppC++17

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