Illustration of string prefixes

Longest Common Prefix: Five Algorithms Compared

🔢 Problem Statement LeetCode 14 – Longest Common Prefix Given an array of strings, return the longest common prefix among them. If no common prefix exists, return an empty string (""). Example 1 Input: ["flower", "flow", "flight"] → Output: "fl" Example 2 Input: ["dog", "racecar", "car"] → Output: "" Constraints 1 ≤ strs.length ≤ 200 0 ≤ strs[i].length ≤ 200 strs[i] contains only lowercase English letters if non-empty. 👨‍💻 Solution Strategies We’ll explore and compare five distinct approaches, from brute force to divide & conquer: ...

August 3, 2025 · 3 min · Frederico Gago