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Student A and his friends have to complete ‘N’ courses in order to complete their UG programme. The courses are numbered from 1, 2, 3, …, N. There are ‘M’ requirements for each test case. The requirements are in the form of course C1 is a prerequisite for course C2. Find an order for each test case in which student A and his friends can complete all the courses. Input The first line of input co

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solution.cppC++17

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