Subarray Sum Equals K | Leetcode 560 | Prefix Sum + HashMap | JavaScript | Brute-Better-Best

🎯 Leetcode 560 - Subarray Sum Equals K Maximum subarray sum: https://www.youtube.com/watch?v=M7TbXQK3uTw In this video, we break down one of the most common and important interview problems — **Subarray Sum Equals K** — from brute force to optimal solution. You’ll learn: ✅ Brute Force approach (O(n²)) ✅ Better approach ( O(n²)) ✅ Optimal solution using Prefix Sum + Hash Map (O(n)) ✅ Dry run explanation --- 🧠 Problem Summary: Given an array `nums` and an integer `k`, return the total number of **continuous subarrays** whose sum equals to `k`. --- 📌 Leetcode Problem Link: https://leetcode.com/problems/subarray-sum-equals-k/ --- 🧠 Great for FAANG, tech interviews, and DSA prep. 🔥 More DSA videos coming soon! Subscribe to stay updated! 💬 Got questions or suggestions? Drop a comment below! On this channel, you'll find: ✅ Beginner to Advanced DSA Tutorials (Arrays, Linked Lists, Trees, Graphs, Dynamic Programming & more!) ✅ Coding Interview Preparation (Google, Microsoft, Amazon, FAANG & top tech companies) ✅ LeetCode, CodeChef, HackerRank Solutions with in-depth explanations ✅ System Design & Competitive Programming Tips 🎯 Whether you're a beginner starting your DSA journey or a pro sharpening your problem-solving skills, this channel has something for you!🔔 Subscribe now & start your DSA mastery journey today! 📌 Follow us for updates & extra content: 📱Instagram: https://www.instagram.com/maheshrd999/ 🌐 LinkedIn: https://www.linkedin.com/in/mahesh-dharwad-b4839267/ --- Timestamp ⏱️ Timestamps: 00:00 - Intro 00:30 - Problem Explanation 03:50 - Brute Force Approach 09:45 - Better Solution 11:50 - Better solution execution on leetcode 13:25 - Optimal (Prefix Sum + HashMap) 30:00 - Optimal solution execution on leetcode #Leetcode560 #SubarraySumEqualsK #PrefixSum #JavaScriptDSA #JavaDSA #TwoPointer #HashMap #CodingInterview #LeetcodeJava #LeetcodeJavaScript #DSASeries #CodingWithMe