Longest Repeating Character Replacement | LeetCode 424 | Python Solution

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In this video, we solve the LeetCode problem ‘Longest Repeating Character Replacement’ (Problem 424) using Python.

This problem is a great test of your algorithmic skills, and we’ll show you an efficient approach using the sliding window technique to solve it.

*Timestamps:*
00:00 - Introduction
00:32 - Problem Explanation
02:53 - Brute force Approach with visual explanation
05:18 - Optimised Approach with visual explanation
16:09 - Time and Space Complexity Analysis
17:22 - Coding the solution
21:41 - Conclusion

🔍 *What You’ll Learn:*
- Breakdown of the problem and its complexities.
- Efficient solution using the sliding window technique for an optimal O(N) time complexity.
- Key insights into time and space complexity.
- Step-by-step walkthrough of the code implementation.

*Problem Description:*
Given a string s that consists of only uppercase English letters, you can replace any character in the string with another character to get the longest repeating character substring. Return the length of this substring after performing at most k replacements.

This is a common problem in coding interviews that tests your understanding of sliding window techniques and character frequency management.

*Topics Covered:*
- Brute Force Approach
- Sliding Window Technique
- Character Frequency Management
- Time and Space Complexity Analysis
- Algorithm Optimization

*LeetCode Problem Link:*

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