---
title: "Discussion on \"LeetCode 647 Palindromic Substrings - Three  Solution from O(n³) to O(n) - (Med, Java)\" | Hashnode"
description: "Discussion on \"LeetCode 647 Palindromic Substrings - Three  Solution from O(n³) to O(n) - (Med, Java)\". 647. Palindromic Substrings\n\nWhen tackling LeetCode 647 (Palindromic Substrings), there are multiple ways to solve the problem. Today, I'll walk through three distinct approaches: the Brute Force method, the Expand Around Centers technique, and the a..."
url: "https://hashnode.com/posts/leetcode-647-palindromic-substrings-three-solution-from-on3-to-on-med-java/686cb7aeab964ccef469639a"
---

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# [LeetCode 647 Palindromic Substrings - Three Solution from O(n³) to O(n) - (Med, Java)](https://huanganni.hashnode.dev/leetcode-647-palindromic-substrings-three-solution-from-on3-to-on-med-java?utm_source=hashnode&utm_medium=feed)

647\. Palindromic Substrings When tackling LeetCode 647 (Palindromic Substrings), there are multiple ways to solve the problem. Today, I'll walk through three distinct approaches: the Brute Force method, the Expand Around Centers technique, and the a...

Jul 8, 2025 · 6 min read · huanganni.hashnode.dev  
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-   [#palindrome](https://hashnode.com/tag/palindrome)
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## Written by

[Anni Huang](https://hashnode.com/@HuangAnni)

@HuangAnni · Singapore

  
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LLM Training Operation Specialist @ ByteDance | Ex-Master of IT in Business (AI track) at SMU

I’m Anni Huang, an AI researcher-in-training currently at ByteDance, specializing in LLM training operations with a coding focus. I bridge the gap between engineering execution and model performance, ensuring the quality, reliability, and timely delivery of large-scale training projects.

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