Solution: Greatest Common Divisor of Strings
Explore how to solve the Greatest Common Divisor of Strings problem by checking string concatenations and using the Euclidean algorithm. Understand how to identify the largest string that divides two input strings and apply this to coding interviews involving string and math patterns. This lesson helps you grasp efficient solutions with clear time and space complexity considerations.
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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. ...