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How to Solve Find Longest Special Substring That Occurs Thrice I Problem
Master the Find Longest Special Substring That Occurs Thrice I LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#2981
LeetCode ProblemFind Longest Special Substring That Occurs Thrice I
You are given a string s that consists of lowercase English letters. A string is called special if it is made up of only a single character. For example, the string "abc" is not special, whereas the strings "ddd", "zz", and "f" are special. Return the length of the longest special substring of s which occurs at least thrice, or -1 if no special substring occurs at least thrice. A substring is a contiguous non-empty sequence of characters within a string.
Hash TableStringBinary SearchSliding WindowCounting
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Problem Breakdown
Understanding the Find Longest Special Substring That Occurs Thrice I Problem
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Problem Statement
You are given a string s that consists of lowercase English letters. A string is called special if it is made up of only a single character. For example, the string "abc" is not special, whereas the strings "ddd", "zz", and "f" are special. Return the length of the longest special substring of s which occurs at least thrice, or -1 if no special substring occurs at least thrice. A substring is a contiguous non-empty sequence of characters within a string.
MediumProblem #2981
LeetCodeFind Longest Special Substring That Occurs Thrice I
Related Topics
Hash TableStringBinary SearchSliding WindowCounting
How Phantom Code Helps
Get real-time assistance for Find Longest Special Substring That Occurs Thrice I problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
s = "aaaa"
Output
2
# Example 2
Input
s = "abcdef"
Output
-1
# Example 3
Input
s = "abcaba"
Output
1
Constraints
3 <= s.length <= 50
s consists of only lowercase English letters.
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Solve Find Longest Special Substring That Occurs Thrice I — You are given a string s that consists of lowercase English letters. A string is...
Here's the optimal approach using Hash Table:
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 Find Longest Special Substring That Occurs Thrice I and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Find Longest Special Substring That Occurs Thrice I 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 Find Longest Special Substring That Occurs Thrice I?
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 Find Longest Special Substring That Occurs Thrice I?
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 Find Longest Special Substring That Occurs Thrice I 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 Find Longest Special Substring That Occurs Thrice I 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 Find Longest Special Substring That Occurs Thrice I 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 Find Longest Special Substring That Occurs Thrice I 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 Find Longest Special Substring That Occurs Thrice I 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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