Find Pivot Index | LeetCode 724 | Prefix Sum Trick | Interview Problem Explained скачать в хорошем качестве

Find Pivot Index | LeetCode 724 | Prefix Sum Trick | Interview Problem Explained

In this video, we solve LeetCode 724 – Find Pivot Index using a clean and optimal approach. You'll learn how to use the prefix sum technique to find the index where the sum of elements on the left equals the sum of elements on the right — all in O(n) time and O(1) space. This is a classic array + prefix sum + balance condition problem that frequently appears in coding interviews and online assessments. 🧠 What you'll learn: • Problem breakdown in simple terms • Brute force vs optimized approach • Prefix sum intuition • Left sum vs right sum logic • Step-by-step dry run • Interview-friendly explanation • Time & space complexity analysis • Clean implementation (C++) 🎯 Concepts Covered: Prefix Sum Array Traversal Running Sum Technique Balance Condition Logic Interview Problem Solving Patterns 🚀 Perfect for: Beginners in DSA Interview preparation Placement training Coding practice Students learning arrays and prefix sums