Leetcode 523 Continous Subarray Sum | Java | Pattern 4 : Prefix Sum
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YouTubeMr Surya Sir
Leetcode 523 Continous Subarray Sum | Java | Pattern 4 : Prefix Sum
In this video we break down LeetCode 523 – Continuous Subarray Sum using the powerful Prefix Sum pattern with remainders. You’ll learn: • The brute force approach • Why O(n²) is inefficient • The Prefix Sum remainder trick • How HashMap helps detect valid subarrays quickly This tutorial is beginner-friendly and perfect for: Data ...
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