Unique Elements

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Given an array of size n. Find the number of unique(non-repeating) elements in the array. ###Input: - First line will contain $T$, number of testcases. Then the testcases follow. - The first line of each test case contains a number $N$,size of the array. - The second line of each test case contains $N$ space separated integers of the array. ###Output: - For each test, print the number

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solution.cppC++17

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