Reverse Linked List II
Explore how to reverse nodes within a specified range in a singly linked list using in-place manipulation methods. Understand the problem constraints and develop an efficient solution to modify the list between two positions, enhancing your skills in linked list algorithms crucial for coding interviews.
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.value -
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 {// public:// int val;// ListNode* next;// // Constructor// ListNode(int val = 0, ListNode* next = nullptr);// };ListNode *ReverseBetween(ListNode *head, int left, int right){// Replace this placeholder return statement with your codereturn head;}