noob and his mind

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Noob is very intelligent in his class , he always play many mind games there for he has sharp mind but now his teacher is given a challenge to him he is given a series and he has to find $Nth$ term in the series. 0, 0, 2, 1, 4, 2, 6, 3, 8, 4, 10, 5, 12 . . . ###Input: - First line will contain $T$ , number of testcases. - Each testcase contains a single line of input , integer $N$ . ###Output:

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solution.cppC++17

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