Day 21: Subarray With Zero Sum | HashMap Approach Explained + Visualization
7:12
YouTubeCode with Vinay
Day 21: Subarray With Zero Sum | HashMap Approach Explained + Visualization
Welcome to Day 21 of the DSA Challenge! In today’s video, we solve an important problem: Subarray With Zero Sum using the Prefix-Sum + HashMap technique and visualize every step clearly. 🔍 What you’ll learn in this video: When does a zero-sum subarray exist? Why prefix-sum helps detect repeated sums. How HashMap stores visited sums. Step ...
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