給出一個區間的集合，請合併所有重疊的區間。

示例 1:

輸入: [[1,3],[2,6],[8,10],[15,18]]
輸出: [[1,6],[8,10],[15,18]]
解釋: 區間 [1,3] 和 [2,6] 重疊, 將它們合併為 [1,6].

示例 2:

輸入: [[1,4],[4,5]]
輸出: [[1,5]]
解釋: 區間 [1,4] 和 [4,5] 可被視為重疊區間。

渣渣晴寫的太蠢了

# Definition for an interval.
# class Interval:
#     def __init__(self, s=0, e=0):
#         self.start = s
#         self.end = e

class Solution:
    def merge(self, intervals):
        """
        :type intervals: List[Interval]
        :rtype: List[Interval]
        """
        i=0
        while i<len(intervals)-1:
            j=i+1
            while j<len(intervals):
                if intervals[i].start<=intervals[j].start and intervals[i].end>=intervals[j].end:#i包括j
                    del intervals[j]
                elif intervals[j].start<=intervals[i].start and intervals[j].end>=intervals[i].end:#j包括i
                    intervals[i].end=intervals[j].end
                    intervals[i].start=intervals[j].start
                    del intervals[j]
                    j=i+1
                elif intervals[i].end>=intervals[j].start and intervals[i].start<=intervals[j].end and intervals[i].start<=intervals[j].start:#i尾j頭拼接
                    intervals[i].end=intervals[j].end
                    del intervals[j]
                    j=i+1
                elif intervals[j].end>=intervals[i].start and intervals[j].start<=intervals[i].end and intervals[j].start<=intervals[i].start:#j尾i頭拼接
                    intervals[i].start=intervals[j].start
                    del intervals[j]
                    j=i+1
                else:
                    j=j+1
            i=i+1
        return intervals
 

大佬的程式碼：

先按start排個序……再看看能不能合併……

class Solution:

    def merge(self, intervals):
        """
        :type intervals: List[Interval]
        :rtype: List[Interval]
        """
        intervals.sort(key=lambda x :x.start)
        result = []
        for item in intervals:
            if not result or result[-1].end < item.start:
                result.append(item)
            else:
                result[-1].end = max(item.end, result[-1].end)
        # print(result)
        return result