Reverse Linked List II
Understand how to reverse nodes within a singly linked list between specified left and right positions. This lesson guides you through the problem constraints and implementation steps, helping you manipulate linked lists efficiently without extra space.
We'll cover the following...
Statement
Given a singly linked list with nodes and two positions, left and right, the objective is to reverse the nodes of the list from left to right. Return the modified list.
Constraints:
-
n -
node.val -
leftrightn
Examples
Understand the problem
Let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:
Reverse Linked List II
What is the output if the following linked list and left and right values are given as input?
linked list = 8 → 0 → 6 → 1 → 0 → 7 → 8 → 2
left = 1, right = 5
2 → 8 → 7 → 0 → 1 → 6 → 0 → 8
8 → 0 → 6 → 2 → 8 → 7 → 0 → 1
0 → 1 → 6 → 0 → 8 → 7 → 8 → 2
0 → 8 → 6 → 1 → 0 → 7 → 8 → 2
Figure it out!
We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.
Try it yourself
Implement your solution in the following coding playground.
// Definition for a Linked List node// class ListNode {// constructor(val = 0, next = null) {// this.val = val;// this.next = next;// }// }import {LinkedList,ListNode} from './ds_v1/LinkedList.js';function reverseBetween(head, left, right) {// Replace this placeholder return statement with your codereturn head}export {reverseBetween};