Day 39/200: The Power of Prefix Sum | Interview Prep #dsa #leetcode #algorithms #coding #viral

Welcome to Day 39 of the 200 Days DSA Challenge 🚀 with CodeWithGovind!
Today’s session is all about understanding Prefix Sum — one of the most powerful techniques in arrays and subarray problems that drastically simplifies complex calculations.

🔑 What you’ll learn in this video:

The core concept of Prefix Sum with real-world intuition

How to compute prefix sums efficiently in O(n) time

Difference between prefix sum and cumulative sum

Solving range sum queries and subarray problems using prefix sums

Common interview patterns and traps

Step-by-step dry run and visual explanation

💡 Once you master Prefix Sum, problems like Subarray Sum Equals K, Pivot Index, and Equilibrium Point will become much easier to solve!
Keep learning consistently — every concept you understand builds a stronger problem-solving foundation for your interviews 🚀

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Видео Day 39/200: The Power of Prefix Sum | Interview Prep #dsa #leetcode #algorithms #coding #viral канала Code With Govind