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How to Solve Greatest Common Divisor of Strings Problem
Master the Greatest Common Divisor of Strings LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsEasy#1071
LeetCode ProblemGreatest Common Divisor of Strings
For two strings s and t, we say "t divides s" if and only if s = t + t + t + ... + t + t (i.e., t is concatenated with itself one or more times). Given two strings str1 and str2, return the largest string x such that x divides both str1 and str2.
MathString
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Problem Breakdown
Understanding the Greatest Common Divisor of Strings Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
For two strings s and t, we say "t divides s" if and only if s = t + t + t + ... + t + t (i.e., t is concatenated with itself one or more times). Given two strings str1 and str2, return the largest string x such that x divides both str1 and str2.
EasyProblem #1071
LeetCodeGreatest Common Divisor of Strings
Related Topics
MathString
How Phantom Code Helps
Get real-time assistance for Greatest Common Divisor of Strings problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
str1 = "ABCABC", str2 = "ABC"
Output
"ABC"
# Example 2
Input
str1 = "ABABAB", str2 = "ABAB"
Output
"AB"
# Example 3
Input
str1 = "LEET", str2 = "CODE"
Output
""
Constraints
1 <= str1.length, str2.length <= 1000
str1 and str2 consist of English uppercase letters.
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Solve Greatest Common Divisor of Strings — For two strings s and t, we say "t divides s" if and only if s = t + t + t + ......
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 Greatest Common Divisor of Strings and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Greatest Common Divisor of Strings 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 Greatest Common Divisor of Strings?
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 Greatest Common Divisor of Strings?
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 Greatest Common Divisor of Strings 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 Greatest Common Divisor of Strings 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 Greatest Common Divisor of Strings 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 Greatest Common Divisor of Strings 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 Greatest Common Divisor of Strings 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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