252. Meeting Rooms

https://leetcode.com/problems/meeting-rooms/

Python

class Solution:
    def canAttendMeetings(self, intervals: List[List[int]]) -> bool:
        if not intervals:
            return True

        intervals.sort(key=lambda interval: interval[0])

        pre_end = intervals[0][1]

        for interval in intervals[1:]:
            if interval[0] < pre_end:
                return False
            pre_end = interval[1]

        return True