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How to Solve Longest Substring of One Repeating Character Problem
Master the Longest Substring of One Repeating Character LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsHard#2213
LeetCode ProblemLongest Substring of One Repeating Character
You are given a 0-indexed string s. You are also given a 0-indexed string queryCharacters of length k and a 0-indexed array of integer indices queryIndices of length k, both of which are used to describe k queries. The ith query updates the character in s at index queryIndices[i] to the character queryCharacters[i]. Return an array lengths of length k where lengths[i] is the length of the longest substring of s consisting of only one repeating character after the ith query is performed.
ArrayStringSegment TreeOrdered Set
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Problem Breakdown
Understanding the Longest Substring of One Repeating Character Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a 0-indexed string s. You are also given a 0-indexed string queryCharacters of length k and a 0-indexed array of integer indices queryIndices of length k, both of which are used to describe k queries. The ith query updates the character in s at index queryIndices[i] to the character queryCharacters[i]. Return an array lengths of length k where lengths[i] is the length of the longest substring of s consisting of only one repeating character after the ith query is performed.
HardProblem #2213
LeetCodeLongest Substring of One Repeating Character
Related Topics
ArrayStringSegment TreeOrdered Set
How Phantom Code Helps
Get real-time assistance for Longest Substring of One Repeating Character problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
s = "babacc", queryCharacters = "bcb", queryIndices = [1,3,3]
Output
[3,3,4]
# Example 2
Input
s = "abyzz", queryCharacters = "aa", queryIndices = [2,1]
Output
[2,3]
Constraints
1 <= s.length <= 105
s consists of lowercase English letters.
k == queryCharacters.length == queryIndices.length
1 <= k <= 105
queryCharacters consists of lowercase English letters.
0 <= queryIndices[i] < s.length
How Phantom Code Helps with LeetCode Problems
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Solve Longest Substring of One Repeating Character — You are given a 0-indexed string s. You are also given a 0-indexed string queryC...
Here's the optimal approach using Array:
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 Longest Substring of One Repeating Character and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Longest Substring of One Repeating Character 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 Longest Substring of One Repeating Character?
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 Longest Substring of One Repeating Character?
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 Longest Substring of One Repeating Character 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 Longest Substring of One Repeating Character 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 Longest Substring of One Repeating Character 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 Longest Substring of One Repeating Character 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 Longest Substring of One Repeating Character 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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