class Solution:
    def insert(self, intervals: list[list[int]], newInterval: list[int]) -> list[list[int]]:
        l = newInterval[0]
        r = newInterval[1]
        if r < intervals[0][0]:
            intervals.insert(0, newInterval)
            return intervals
        if l > intervals[-1][1]:
            intervals.append(newInterval)
            return intervals
        nl = 0
        nl_f = False
        nl_ff = False
        nr = len(intervals) 
        nr_f = False
        nr_ff = False
        for ind, interval in enumerate(intervals):
            left = interval[0]
            right = interval[1]
            if l >= left and l <= right:
                nl_f = True
                nl = ind
            if r >= left and r <= right:
                nr_f = True
                nr = ind + 1

        if nl_f == False:
            for i in range(1, len(intervals)):
                if l > intervals[i - 1][1] and l < intervals[i][0]:
                    nl = i
                    nl_ff = True
                    break

        if nr_f == False:
             for i in range(1, len(intervals)):
                if r > intervals[i - 1][1] and r < intervals[i][0]:
                    nr = i
                    nr_ff = True
                    break

        print(nl, nr, nl_f, nr_f)

        rlt = []
        for i in range(nl):
            rlt.append(intervals[i])
        nl_l = intervals[nl][0]
        if nl_f == False:
            nl_l = l
        if nr_ff == True or nr_f == True:
            nr = nr - 1
            nr_r = intervals[nr][1]
            nr = nr + 1

        if nr_f == False:
            nr_r = r
        
        rlt.append([nl_l, nr_r])

        print(rlt)
        for i in range(nr, len(intervals)):
            rlt.append(intervals[i])
        return rlt

intervals = [[1,3], [6,9]]
newInterval = [2,5]
sol = Solution()
print(sol.insert(intervals=intervals, newInterval=newInterval))
intervals = [[1,2], [3,5], [6,7], [8,10],[12, 16]]
newInterval = [4, 8]
print(sol.insert(intervals=intervals, newInterval=newInterval))

intervals = [[1,2], [3,5], [6,7], [8,10],[12, 16]]
newInterval = [0, 16]
print(sol.insert(intervals=intervals, newInterval=newInterval))
print()
intervals = [[1,5]]
newInterval = [6, 18]
print(sol.insert(intervals=intervals, newInterval=newInterval))