XOR Pair

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Pranav is given an array of length $N$ and an integer $x$. He wanted to make the given array good. An array is called good if he can divide the array into pairs such that the bitwise xor of each pair is $x$. Find the minimum number of element Pranav have to add to a given array so that it becomes good. ### Input - First line will contain $T$, number of testcases. Then the testcases follow. -

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solution.cppC++17

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