Solution: Greatest Common Divisor of Strings
Explore the method to determine the greatest common divisor of two strings by checking their concatenations and applying the Euclidean algorithm to find the shared repeating pattern. This lesson helps you understand how to identify if two strings share a common base pattern and efficiently extract it, preparing you for similar coding interview challenges.
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Statement
For two strings s and t, we say that t divides s if and only if s can be formed by concatenating one or more copies of t together (i.e., s = t + t + ... + t).
Given two strings str1 and str2, return the largest string x such that x divides both str1 and str2. If no such string exists, return an empty string.
Constraints:
str1.length,str2.lengthstr1andstr2consist of English uppercase letters. ...