LeetCode 14 | Longest Common Prefix | Python Vertical Scan + Horizontal Scan | AlgoYogi

Welcome to AlgoYogi! 🚀 Start Your Smart Coding Prep at 👉 https://algoyogi.io Today’s problem: **LeetCode 14: Longest Common Prefix** Given an array of strings, find the longest prefix that appears at the start of every string. Return an empty string if there is none. We explore two classic strategies: 1. **Vertical scan** – Compare characters by column position across all strings. 2. **Horizontal scan** – Use the first string as a reference and shrink the prefix as needed per other string. 👉 Problem Link: https://leetcode.com/problems/longest-common-prefix/ --- ### ⏱ Timestamps 0:00 Introduction 0:20 Problem Statement 0:30 Approach 6:30 Python Code Walkthrough 10:30 Time & Space Complexity --- ### Why Watch? - Master both scanning strategies used in interviews and competitive coding - Clean Python implementations with early exits on mismatch - Understand practical edge cases: empty arrays, single string, no common prefix --- 📢 Next Steps: - Practice string prefix tasks on AlgoYogi - Share your Trie or Divide & Conquer variants in the comments #LeetCode #LongestCommonPrefix #Python #StringAlgorithms #AlgoYogi