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Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary).

You may assume that the intervals were initially sorted according to their start times.

Example 1:

Input: intervals = [[1,3],[6,9]], newInterval = [2,5] Output: [[1,5],[6,9]]

Example 2:

Input: intervals = [[1,2],[3,5],[6,7],[8,10],[12,16]], newInterval = [4,8] Output: [[1,2],[3,10],[12,16]] Explanation: Because the new interval [4,8] overlaps with [3,5],[6,7],[8,10].

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

class Solution:
    def insert(self, intervals, newInterval):
        """
        :type intervals: List[Interval]
        :type newInterval: Interval
        :rtype: List[Interval]
        """
        intervals.append(newInterval)
        intervals=sorted(intervals, key=lambda i: i.start)
        result=[]
        for item in intervals:
            if len(result)==0:
                result.append(item)
                continue
            if item.start<=result[-1].end:
                result[-1].end=max([item.end,result[-1].end])
            else:
                result.append(item)
        return result
                

Solution: https://leetcode.com/problems/insert-interval/