---
title: "#expand-around-centers articles | Hashnode"
description: "Explore 1 articles tagged #expand-around-centers on Hashnode. Tutorials, guides, and how-tos from the community."
url: "https://hashnode.com/tag/expand-around-centers"
---

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# #expand-around-centers

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[Anni Huang](https://hashnode.com/@HuangAnni) · [Jul 8, 2025](https://hashnode.com/posts/leetcode-647-palindromic-substrings-three-solution-from-on3-to-on-med-java/686cb7aeab964ccef469639a)

### [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...

6 min read · [huanganni.hashnode.dev](https://huanganni.hashnode.dev/leetcode-647-palindromic-substrings-three-solution-from-on3-to-on-med-java?utm_source=hashnode&utm_medium=feed)