DOUBLE AND MISSING

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You are given a read-only array of n integers from 1 to n. Each integer appears exactly once except A which appears twice and B which is missing. Print A and B. ###Input: - First-line will contain $T$, the number of test cases. Then the test cases follow. - Second-line will contain $N$, the number of elements in the array. - The third line will contain the elements of the array.

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solution.cppC++17

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