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How to Solve Swapping Nodes in a Linked List Problem
Master the Swapping Nodes in a Linked List LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#1721
LeetCode ProblemSwapping Nodes in a Linked List
You are given the head of a linked list, and an integer k. Return the head of the linked list after swapping the values of the kth node from the beginning and the kth node from the end (the list is 1-indexed).
Linked ListTwo Pointers
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Problem Breakdown
Understanding the Swapping Nodes in a Linked List 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, and an integer k. Return the head of the linked list after swapping the values of the kth node from the beginning and the kth node from the end (the list is 1-indexed).
MediumProblem #1721
LeetCodeSwapping Nodes in a Linked List
Related Topics
Linked ListTwo Pointers
How Phantom Code Helps
Get real-time assistance for Swapping Nodes in a Linked List problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
head = [1,2,3,4,5], k = 2
Output
[1,4,3,2,5]
# Example 2
Input
head = [7,9,6,6,7,8,3,0,9,5], k = 5
Output
[7,9,6,6,8,7,3,0,9,5]
Constraints
The number of nodes in the list is n.
1 <= k <= n <= 105
0 <= Node.val <= 100
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Solve Swapping Nodes in a Linked List — You are given the head of a linked list, and an integer k. Return the head of th...
Here's the optimal approach using Linked List:
def solve(input):
# Optimal O(n) solution
return result
Time: O(n) | Space: O(n)
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Frequently Asked Questions
Common questions about solving Swapping Nodes in a Linked List and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Swapping Nodes in a Linked List during interviews?
Phantom Code 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.
What if the interviewer asks follow-up questions or modifications to problems like Swapping Nodes in a Linked List?
Phantom Code adapts in real-time. Screenshot the modified problem or use audio mode to capture the interviewer's follow-up, and get an updated solution within seconds — including edge cases and optimizations.
Can Phantom Code help me communicate my solution for problems like Swapping Nodes in a Linked List?
Yes. Phantom Code provides step-by-step approach explanations with 3 progressive thoughts, so you can walk through your solution naturally. It also provides time and space complexity analysis to discuss trade-offs.
How does Phantom Code assist with different programming languages for Swapping Nodes in a Linked List type problems?
Phantom Code supports 11 programming languages including Python, Java, C++, JavaScript, TypeScript, Go, Rust, Ruby, Swift, Kotlin, and C#. Set your preferred language and get idiomatic solutions.
What coding mistakes does Phantom Code help me avoid during Swapping Nodes in a Linked List interviews?
Phantom Code catches common mistakes like off-by-one errors, missing edge cases, incorrect base conditions, and suboptimal approaches. It provides clean, well-structured code that handles all edge cases.
Is Phantom Code detectable when solving problems like Swapping Nodes in a Linked List during live interviews?
No. Phantom Code runs as an invisible desktop overlay that doesn't appear in screen shares, recordings, or proctoring software. It works with Zoom, HackerRank, CodeSignal, CoderPad, and all major platforms.
How does Phantom Code help when I'm struggling with Swapping Nodes in a Linked List style questions under pressure?
The AI provides structured guidance: first the approach (what algorithm/data structure to use and why), then the implementation with clean code, and finally complexity analysis. This helps you think clearly even under pressure.
Does Phantom Code work for the coding platforms used in Swapping Nodes in a Linked List interviews?
Yes. Phantom Code works with all major coding platforms including LeetCode, HackerRank, CodeSignal, CoderPad, HackerEarth, and any browser-based coding environment.
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