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How to Solve Swap Adjacent in LR String Problem
Master the Swap Adjacent in LR String LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#777
LeetCode ProblemSwap Adjacent in LR String
In a string composed of 'L', 'R', and 'X' characters, like "RXXLRXRXL", a move consists of either replacing one occurrence of "XL" with "LX", or replacing one occurrence of "RX" with "XR". Given the starting string start and the ending string result, return True if and only if there exists a sequence of moves to transform start to result.
Two PointersString
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Problem Breakdown
Understanding the Swap Adjacent in LR String Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
In a string composed of 'L', 'R', and 'X' characters, like "RXXLRXRXL", a move consists of either replacing one occurrence of "XL" with "LX", or replacing one occurrence of "RX" with "XR". Given the starting string start and the ending string result, return True if and only if there exists a sequence of moves to transform start to result.
MediumProblem #777
LeetCodeSwap Adjacent in LR String
Related Topics
Two PointersString
How Phantom Code Helps
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Examples
# Example 1
Input
start = "RXXLRXRXL", result = "XRLXXRRLX"
Output
true
# Example 2
Input
start = "X", result = "L"
Output
false
Constraints
1 <= start.length <= 104
start.length == result.length
Both start and result will only consist of characters in 'L', 'R', and 'X'.
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Solve Swap Adjacent in LR String — In a string composed of 'L', 'R', and 'X' characters, like "RXXLRXRXL", a move c...
Here's the optimal approach using Two Pointers:
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 Swap Adjacent in LR String and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Swap Adjacent in LR String 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 Swap Adjacent in LR String?
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 Swap Adjacent in LR String?
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 Swap Adjacent in LR String 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 Swap Adjacent in LR String 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 Swap Adjacent in LR String during live interviews?
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How does Phantom Code help when I'm struggling with Swap Adjacent in LR String 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 Swap Adjacent in LR String 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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