Greatest Common Divisor of Strings | Leetcode 1071 | Python | Explained | Easy

Welcome back, everyone! In today's video, we're diving into the "Greatest Common Divisor of Strings" problem from LeetCode (Problem 1071). This problem is a great way to explore string manipulation and the concept of the greatest common divisor in a new context. We'll walk through the problem step-by-step and cover two effective solutions that will help you master this concept.

📝 Problem Description:
You are given two strings, str1 and str2. You need to find the greatest common divisor of these strings, which is the largest string x such that x divides both str1 and str2 exactly.

🔍 Example:
Input:

makefile
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str1 = "ABCABC"
str2 = "ABC"
Output:

arduino
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"ABC"
🚀 Solution Overview:
We'll cover two approaches to solve this problem:

Mathematical Approach: This method involves using the properties of string concatenation and the Euclidean algorithm to find the greatest common divisor of the lengths of the two strings.

Iterative Approach: We’ll manually explore the possible substrings to find the largest common divisor string.

💡 Key Concepts:

String manipulation
Greatest Common Divisor (GCD)
Euclidean Algorithm
📚 What You'll Learn:
By the end of this video, you'll understand:

How to efficiently find the greatest common divisor of two strings.
How to apply mathematical concepts to solve string problems in Python.
Two different methods to solve the problem, giving you a deeper understanding of string operations.
🔧 Code Implementation:
I'll provide the full Python code for both approaches, and we’ll go through each line together to ensure you understand the logic and flow.

💬 Join the Discussion:
If you have any questions or need further clarifications, feel free to leave a comment below. I'm always happy to interact with you and help out where I can.

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