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
        intervals.sort(key=lambda x: x.start)
        n=len(intervals)
        if n==0:return intervals
        cur=intervals[0]
        i=1
        ans=[]
        while i<n:
            nxt=intervals[i]
            if nxt.start<=cur.end:
                cur.end=max(nxt.end,cur.end)
            else:
                ans.append(cur)
                cur=nxt
            i+=1
        ans.append(cur)
        return ans