Absolute difference

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Given an array of N numbers in increasing order. You have to answer the summation of the absolute difference of all pairs in the given array. For example, you have an array of 3 elements : 4 7 9 then all the pairs are : 4 7 4 9 7 9 Input The first line contains the number of test cases. Each test cases contains an integer . next line consists of N integers, the elements of the array in incr

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solution.cppC++17

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