N-digit Numbers

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Given an integer $N$, print the sum of all $N$ digit numbers whose sum of the digits at even indices is equal to the sum of the digits at odd indices. ###Input: - The first line of the input contains a single integer $T$ denoting the number of test cases. Then the test cases follow. - Each test case consists of a single integer $N$. ###Output: For each test case, output in a single line the

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solution.cppC++17

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