(E) Umang with XOR Friends

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Due to the worldwide pandemic exams are planned to be organized online. This thing was a life savior for many students as they haven't studied anything so far. Umang is one of such students. Now Umang starts to make a strategy as the exams are approaching. In this process he first asked the examination incharge to give a list of all the students in his slot of online exam, and the exam incharg

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solution.cppC++17

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