Pair Find

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You are given an array $A$ of positive numbers of size $N$ and an positive integer $k$. Find the number of all possible pairs in the array so that the sum of pairs is equal to $k$. ###Input : - The first line of the input contains a single integer $T$ denoting the number of test cases. - The first line of each test case contains two space-separated integers $N$ and $k$. - The second line contain

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solution.cppC++17

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