Crack The Logic

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One day Chef teacher gives him a problem to solve. The problem is as follows: Given a number N , print the number corresponding to input by observing following series 0 2 5 5 10 10 ... Chef took it as a challange but struggling a lot to find series help him carefully so that his teacher don't notice you!! ### Input - First line will contain $T$, number of testcases. Then the testcases follow.

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solution.cppC++17

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