Day 35/200: Longest Repeating Character Replacement | Interview Prep

Описание: Welcome to Day 35 of the 200 Days DSA Challenge 🚀 with CodeWithGovind!
Today’s problem — LeetCode 424: Longest Repeating Character Replacement — is a brilliant Sliding Window problem that teaches how to handle character frequency and window validity dynamically in string problems.

🔑 What you’ll learn in this video:

The intuition behind the character replacement logic

Step-by-step understanding of the Sliding Window approach

How to track max frequency characters efficiently

Managing window resizing and valid window conditions

Optimizing for O(n) time complexity using HashMap

Real interview patterns where this logic frequently appears

💡 This problem strengthens your understanding of dynamic window logic — a powerful technique for solving many string-based optimization problems.
Stay consistent and curious — every single day of effort compounds into mastery 🚀

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