---
title: "Discussion on \"Prefix Sum - 4\" | Hashnode"
description: "Discussion on \"Prefix Sum - 4\". LeetCode 724: Find Pivot Index – A Mathematical Prefix Sum Problem\nWe’ve been solving prefix sum questions, and this one — Find Pivot Index — is actually more about mathematics than coding tricks.\nThe problem says:\n\nFind an index where the sum of all..."
url: "https://hashnode.com/posts/prefix-sum-4/68dfb54c4c6b22043021b649"
---

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# [Prefix Sum - 4](https://prefix-sum.hashnode.dev/prefix-sum-4?utm_source=hashnode&utm_medium=feed)

LeetCode 724: Find Pivot Index – A Mathematical Prefix Sum Problem We’ve been solving prefix sum questions, and this one — Find Pivot Index — is actually more about mathematics than coding tricks. The problem says: Find an index where the sum of all...

Oct 3, 2025 · 3 min read · prefix-sum.hashnode.dev  
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[Sakshi Sharma](https://hashnode.com/@SakshiSharma45)

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