Subarray Sum Equals K – Optimal O(n) Solution | LeetCode 560 скачать в хорошем качестве

Subarray Sum Equals K – Optimal O(n) Solution | LeetCode 560

Subarray Sum Equals K – Optimal O(n) Solution | LeetCode 560 In this video, we solve LeetCode 560 – Subarray Sum Equals K step by step using the powerful Prefix Sum + HashMap technique. This problem is frequently asked in product-based companies like Amazon, Google, and Microsoft, and it’s a must-know pattern for mastering subarray problems. 🚀 What You’ll Learn: Why the brute force solution is O(n²) How Prefix Sum works How HashMap helps reduce time complexity to O(n) Intuition behind the optimal approach Dry run with example JavaScript implementation Time & Space Complexity analysis If you’re preparing for coding interviews, this is an essential pattern to master! 🧠 Pattern Covered: Prefix Sum + HashMap (Important for subarray & cumulative sum problems) 📌 Don’t forget to like, share, and subscribe for more DSA & JavaScript interview content. #leetcode #dsa #codinginterview #prefixsum #hashmap #faang #faanginterviewprep