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[int]) -> List[List[int]]:
        # write code here
        stack = []
        intervals.sort(key=lambda x:(x.start))
        for i in intervals:
            
            if not stack:
                stack.append(i)
            else:
                if stack[-1].end >= i.start:
                    if stack[-1].end < i.end:
                        stack[-1].end = i.end
                    else:
                        continue
                else:
                    stack.append(i)
        return stack