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How to Solve Minimum Swaps to Make Strings Equal Problem
Master the Minimum Swaps to Make Strings Equal LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#1247
LeetCode ProblemMinimum Swaps to Make Strings Equal
You are given two strings s1 and s2 of equal length consisting of letters "x" and "y" only. Your task is to make these two strings equal to each other. You can swap any two characters that belong to different strings, which means: swap s1[i] and s2[j]. Return the minimum number of swaps required to make s1 and s2 equal, or return -1 if it is impossible to do so.
MathStringGreedy
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Problem Breakdown
Understanding the Minimum Swaps to Make Strings Equal Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given two strings s1 and s2 of equal length consisting of letters "x" and "y" only. Your task is to make these two strings equal to each other. You can swap any two characters that belong to different strings, which means: swap s1[i] and s2[j]. Return the minimum number of swaps required to make s1 and s2 equal, or return -1 if it is impossible to do so.
MediumProblem #1247
LeetCodeMinimum Swaps to Make Strings Equal
Related Topics
MathStringGreedy
How Phantom Code Helps
Get real-time assistance for Minimum Swaps to Make Strings Equal problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
s1 = "xx", s2 = "yy"
Output
1
# Example 2
Input
s1 = "xy", s2 = "yx"
Output
2
# Example 3
Input
s1 = "xx", s2 = "xy"
Output
-1
Constraints
1 <= s1.length, s2.length <= 1000
s1.length == s2.length
s1, s2 only contain 'x' or 'y'.
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Solve Minimum Swaps to Make Strings Equal — You are given two strings s1 and s2 of equal length consisting of letters "x" an...
Here's the optimal approach using Math:
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 Minimum Swaps to Make Strings Equal and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Minimum Swaps to Make Strings Equal 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 Minimum Swaps to Make Strings Equal?
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 Minimum Swaps to Make Strings Equal?
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 Minimum Swaps to Make Strings Equal 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 Minimum Swaps to Make Strings Equal 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 Minimum Swaps to Make Strings Equal 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 Minimum Swaps to Make Strings Equal 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 Minimum Swaps to Make Strings Equal 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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