Solution: Greatest Common Divisor of Strings
Discover how to determine the greatest common divisor of two strings by verifying repeated patterns through concatenation and applying the Euclidean algorithm. This lesson helps you understand the mathematical approach to solve string division problems efficiently in coding interviews, improving your skills in pattern recognition and algorithm design.
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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. ...