题解 | #合并区间#

# class Interval:
#     def __init__(self, a=0, b=0):
#         self.start = a
#         self.end = b

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)
        begin=intervals[0].start
        end=intervals[0].end
        ans=[]
        for  i in range(1,len(intervals)):
            if intervals[i].start>end:
                ans.append(Interval(begin,end))
                begin=intervals[i].start
                end=intervals[i].end
            else:
                if intervals[i].end>end:
                    end=intervals[i].end
        ans.append(Interval(begin,end))


        return ans