252. Meeting Rooms.cpp

/**
 * Definition for an interval.
 * struct Interval {
 *     int start;
 *     int end;
 *     Interval() : start(0), end(0) {}
 *     Interval(int s, int e) : start(s), end(e) {}
 * };
 */
class Solution {
public:
    bool canAttendMeetings(vector<Interval>& intervals) {

        if (intervals.empty())
            return true;

        sort(intervals.begin(), intervals.end(), [] (Interval &i1, Interval &i2 ) { return i1.start < i2.start;});

        for(int i = 0; i<intervals.size()-1; ++i) {

           if(intervals[i].end > intervals[i+1].start)
                return false;

        }

        return true;


    }
};