During iteration, say I want to add the current course, currentTotalTime being total time of all courses taken till now, but adding the current course might exceed my deadline or it doesn’t.</br></br> 1. If it doesn’t, then I have added one new course. Increment the currentTotalTime with duration of current course.

2. If it exceeds deadline, I can swap current course with current courses that has biggest duration.</br> * No harm done and I might have just reduced the currentTotalTime, right? </br> * What preprocessing do I need to do on my course processing order so that this swap is always legal?