252-Meeting-Rooms.cs

public class Solution {
    public bool CanAttendMeetings(int[][] intervals) {
        
            Array.Sort(intervals, (a, b) => a[0] < b[0] ? -1 : 1);
            for (int i = 1; i < intervals.Length; i++)
            {
                if (intervals[i][0] < intervals[i - 1][1])
                {
                    return false;
                }
            }
            return true;
    }
}