Make XOR zero

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Olya has written N binary integers (i.e. either zero or one) on a blackboard. She recently learned about XOR operation. Now she wants to erase exactly one integer in the array so that the XOR of the remaining N - 1 numbers is zero. Please help her to calculate the number of ways of doing so. Input The first line of the input contains an integer T denoting the number of test cases. The descripti

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solution.cppC++17

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