题解 | #合并区间#

# class Interval:
#     def __init__(self, a=0, b=0):
#         self.start = a
#         self.end = b
#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param intervals Interval类一维数组 
# @return Interval类一维数组
#
class Solution:
    def merge(self , intervals: List[Interval]) -> List[Interval]:
        # write code here
        if len(intervals) == 0:
            return []
            
        intervals.sort(key=lambda x: x.start)
        ans = []
        left, maxR = intervals[0].start, intervals[0].end
        for i in range(1, len(intervals)):
            if intervals[i].start > maxR:
                ans.append(Interval(left, maxR))
                left = intervals[i].start
            maxR = max(maxR, intervals[i].end)
        ans.append(Interval(left, maxR))
        return ans