Question 4

You are given two objects, Student and Course, and there exist a many to many relation between them. One student can be enrolled for more than one course and there can be many students enrolled for a single course. Design an effective data structure to store such data keeping in mind that the time complexity for search should be optimum. A search can be for the list of students enrolled for a single course, or for the list of courses a single student is enrolled.

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