DIY: Course Schedule

Solve the interview question "Course Schedule" in this lesson.

Problem statement

You will be given an integer numCourses representing the number of courses. The courses are labeled from 0 to numCourses - 1. You will also be given an array prerequisites where prerequisites[i] = [ai, bi] indicates that you must take course bi first if you want to take the course ai. For example, the pair [1, 0], indicates that to take course 1 you have to first take course 0.

You will have to return true if all of the courses can be finished, otherwise false.

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