How to Solve Reverse Nodes in Even Length Groups Problem
Master the Reverse Nodes in Even Length Groups LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
Interview Coder generates complete solutions and debugging hints that you can use while explaining your approach, so you stay calm and in control.
Reverse Nodes in Even Length Groups
You are given the head of a linked list. The nodes in the linked list are sequentially assigned to non-empty groups whose lengths form the sequence of the natural numbers (1, 2, 3, 4, ...). The length...
Interview Coder will help you solve this problem in real-time during your interview
✨ Get instant solutions, explanations, and code generation
Understanding the Reverse Nodes in Even Length Groups Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given the head of a linked list. The nodes in the linked list are sequentially assigned to non-empty groups whose lengths form the sequence of the natural numbers (1, 2, 3, 4, ...). The length of a group is the number of nodes assigned to it. In other words, The 1st node is assigned to the first group. The 2nd and the 3rd nodes are assigned to the second group. The 4th, 5th, and 6th nodes are assigned to the third group, and so on. Note that the length of the last group may be less than or equal to 1 + the length of the second to last group. Reverse the nodes in each group with an even length, and return the head of the modified linked list.
Reverse Nodes in Even Length Groups
Related Topics
How Interview Coder Helps
Get real-time assistance for Reverse Nodes in Even Length Groups problems during coding interviews. Interview Coder provides instant solutions and explanations.
Examples
head = [5,2,6,3,9,1,7,3,8,4][5,6,2,3,9,1,4,8,3,7]- The length of the first group is 1, which is odd, hence no reversal occurs. - The length of the second group is 2, which is even, hence the nodes are reversed. - The length of the third group is 3, which is odd, hence no reversal occurs. - The length of the last group is 4, which is even, hence the nodes are reversed.
head = [1,1,0,6][1,0,1,6]- The length of the first group is 1. No reversal occurs. - The length of the second group is 2. The nodes are reversed. - The length of the last group is 1. No reversal occurs.
head = [1,1,0,6,5][1,0,1,5,6]- The length of the first group is 1. No reversal occurs. - The length of the second group is 2. The nodes are reversed. - The length of the last group is 2. The nodes are reversed.
Constraints
The number of nodes in the list is in the range [1, 105].0 <= Node.val <= 105How Interview Coder Helps with Leetcode Problems
Trust anchors reduce friction for conversion. Reinforce undetectability claims, platform compatibility, user counts, and the free trial to remove perceived risk.
See Interview Coder in Action
Watch how Interview Coder helps solve LeetCode problems during live interviews
Undetectability Checklist
Platform Compatibility
User results and traction
More than 87,000 developers use Interview Coder and early launch metrics showed rapid adoption. Social proof signals that this approach helps real candidates land offers across a range of companies.
Undetectability and technical details
Our native desktop architecture avoids common detection vectors used by browser extensions. We provide a clear checklist so you can run basic checks and confirm the app will be invisible during live interviews.
Platform compatibility and limitations
We work with Zoom, HackerRank, CodeSignal, CoderPad and other web based platforms, with a known list of app version caveats. Check the compatibility note and request a browser link if a specific desktop app is unsupported.
Frequently Asked Questions
Common questions about solving Reverse Nodes in Even Length Groups and using Interview Coder during coding interviews.
Interview Coder generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.
Ready to Get Started?
Download Interview Coder now and join thousands of developers who have aced their coding interviews