Longest Repeating Character Replacement - Blind 75 | Python | Optimal Solution Explained 🚀

🔍 Problem: Given a string s and an integer k, return the length of the longest substring that can be obtained by replacing at most k characters. 🔥 In this video, we solve Longest Repeating Character Replacement using 3 approaches: ✅ Brute Force (O(n²)) – Try all substrings (inefficient 🚫). ✅ Sliding Window (O(n log n)) – Expand & shrink the window dynamically. ✅ Optimized Sliding Window (O(n)) – Use a frequency map for fast updates. 📌 Links 🔗 Problem: https://leetcode.com/problems/longest-repeating-character-replacement/ 🔗 Solution Submission: [Your LeetCode Submission Link] 📌 Timestamps: ⏳ 00:00 - Introduction 📖 00:30 - Problem Explanation 🔍 00:45 - Brute Force Approach (O(n²)) 🔍 04:45 - Sliding Window (O(n log n)) ⚡ 08:30 - Optimized Sliding Window (O(n)) 🚀 20:00 - Coding Implementation #Blind75 #Leetcode #Python #CodingInterview #DSA #Algorithms #LeetcodeSolutions #InterviewPrep #SoftwareEngineering #Tech