leetcode - 1669. Merge In Between Linked Lists

Description

You are given two linked lists: list1 and list2 of sizes n and m respectively.

Remove list1's nodes from the ath node to the bth node, and put list2 in their place.

The blue edges and nodes in the following figure indicate the result:

Build the result list and return its head.

Example 1:

复制代码
Input: list1 = [10,1,13,6,9,5], a = 3, b = 4, list2 = [1000000,1000001,1000002]
Output: [10,1,13,1000000,1000001,1000002,5]
Explanation: We remove the nodes 3 and 4 and put the entire list2 in their place. The blue edges and nodes in the above figure indicate the result.

Example 2:

复制代码
Input: list1 = [0,1,2,3,4,5,6], a = 2, b = 5, list2 = [1000000,1000001,1000002,1000003,1000004]
Output: [0,1,1000000,1000001,1000002,1000003,1000004,6]
Explanation: The blue edges and nodes in the above figure indicate the result.

Constraints:

复制代码
3 <= list1.length <= 10^4
1 <= a <= b < list1.length - 1
1 <= list2.length <= 10^4

Solution

No other comments, just do simulation.

Time complexity: o ( n 1 + n 2 ) o(n1+n2) o(n1+n2)

Space complexity: o ( 1 ) o(1) o(1)

Code

python3 复制代码
# Definition for singly-linked list.
# class ListNode:
#     def __init__(self, val=0, next=None):
#         self.val = val
#         self.next = next
class Solution:
    def mergeInBetween(self, list1: ListNode, a: int, b: int, list2: ListNode) -> ListNode:
        a_node, b_node = list1, list1
        b -= a - 1
        while a > 1:
            a_node = a_node.next
            a -= 1
        b_node = a_node.next
        while b > 0:
            b_node = b_node.next
            b -= 1
        a_node.next = list2
        list2_end = list2
        while list2_end.next:
            list2_end = list2_end.next
        list2_end.next = b_node
        return list1
相关推荐
知来者逆27 分钟前
计算机视觉——速度与精度的完美结合的实时目标检测算法RF-DETR详解
图像处理·人工智能·深度学习·算法·目标检测·计算机视觉·rf-detr
阿让啊32 分钟前
C语言中操作字节的某一位
c语言·开发语言·数据结构·单片机·算法
এ᭄画画的北北33 分钟前
力扣-160.相交链表
算法·leetcode·链表
爱研究的小陈1 小时前
Day 3:数学基础回顾——线性代数与概率论在AI中的核心作用
算法
渭雨轻尘_学习计算机ing2 小时前
二叉树的最大宽度计算
算法·面试
BB_CC_DD2 小时前
四. 以Annoy算法建树的方式聚类清洗图像数据集,一次建树,无限次聚类搜索,提升聚类搜索效率。(附完整代码)
深度学习·算法·聚类
梁下轻语的秋缘3 小时前
每日c/c++题 备战蓝桥杯 ([洛谷 P1226] 快速幂求模题解)
c++·算法·蓝桥杯
CODE_RabbitV4 小时前
【深度强化学习 DRL 快速实践】逆向强化学习算法 (IRL)
算法
mit6.8244 小时前
[贪心_7] 最优除法 | 跳跃游戏 II | 加油站
数据结构·算法·leetcode
keep intensify4 小时前
通讯录完善版本(详细讲解+源码)
c语言·开发语言·数据结构·算法