Interview Question


Country: United States




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Sort the intervals in order of increasing finish times.
If the current interval start time is >= previous interval finish time, include it,else leave it.
Do the above steps until no more intervals are left. Meanwhile keep incrementing number of classes.

- Aashish June 25, 2012 | Flag Reply
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Is it greedy algorithm?

- wzyflyleaf June 28, 2012 | Flag
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I don't understand the question. Minimum number of classes required for what?

- Anonymous June 25, 2012 | Flag Reply
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- Sort the two arrays.
- Now iterate over the two arrays doing +1 for every start time and -1 for every end time.
- Track the maximum.

e.g. start time 9:00 10:00 10:50 11:10 11:20
end time 9:30 12:00 11:00 11:30 12:00

sorted 9:00 10:00 10:50 11:10 11:20
9:30 11:00 11:30 12:00 12:00

1 0 1 2 1 2 3 2 1 0
so 3 classrooms are needed.

- anon.coder June 30, 2012 | Flag Reply


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