In this video, we solve LeetCode Problem 3 - Longest Substring Without Repeating Characters (Medium level) using Java with the Sliding Window technique, explained in Hindi.
🔍 Problem: Longest Substring Without Repeating Characters
📌 LeetCode #3 | Difficulty: Medium | Blind 75 ⭐
💻 Language: Java
🧠 Approach: Sliding Window + HashSet
⏱️ Timestamps:
0:00 - Problem Explanation
2:00 - Brute Force Approach
5:00 - Sliding Window Intuition
8:00 - Java Code Walkthrough
13:00 - Complexity Analysis
✅ Key Concepts Covered:
- Sliding Window technique
- HashSet for O(1) lookups
- Two pointer approach
- Time: O(n), Space: O(min(m,n))
📚 Complete Playlists:
🔗 Blind 75 Series: https://www.youtube.com/@technoBlogger14o3/playlists
🔗 LeetCode Medium Series: https://www.youtube.com/@technoBlogger14o3/playlists
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