Meeting Rooms

edit  Updated by Benjo

Given an array of meeting time intervals consisting of start and end times [[s1,e1],[s2,e2],...] (si < ei), determine if a person could attend all meetings.

For example,
Given [[0, 30],[5, 10],[15, 20]],
return false.

Meeting Rooms Solution

/**
 * Definition for an interval.
 * public class Interval {
 *     int start;
 *     int end;
 *     Interval() { start = 0; end = 0; }
 *     Interval(int s, int e) { start = s; end = e; }
 * }
 */
public class MeetingRooms {
    public boolean canAttendMeetings(Interval[] intervals) {
        if(intervals == null) {
            return false;
        }

        // Sort the intervals by start time
        Arrays.sort(intervals, new Comparator<Interval>() {
            public int compare(Interval a, Interval b) { return a.start - b.start; }
        });

        for(int i = 1; i < intervals.length; i++) {
            if(intervals[i].start < intervals[i - 1].end) {
                return false;
            }
        }

        return true;
    }
}

See Also