DSA in Python - Longest Common Prefix | Vertical Scan + Alternatives (O(N·M)) | Part 220 [Hindi]

📘 Welcome to Part 220 of Code & Debug’s DSA in Python Course! In this video, the goal is to find the longest starting substring common to all strings in an array. The primary method demonstrated is the vertical scan: pick the first string as a base and compare characters column-by-column across all other strings, stopping at the first mismatch or when any string ends. We’ll also discuss alternative strategies like sorting + first/last comparison and horizontal scanning. 🔗 LeetCode – Longest Common Prefix: https://leetcode.com/problems/longest... 🔗 Companion Reading (Step-by-step with code): https://codeanddebug.in/blog/longest-... 📄 FULL Playlist Sheet (All Videos in Order): https://docs.google.com/spreadsheets/... 🎓 Enroll Free: Master Python DSA Course https://codeanddebug.in/course/master... 🚀 Advance Python DSA for FAANG (Zero to Hero Course) https://codeanddebug.in/course/zero-t... Stay focused and keep coding with Code & Debug. Like | Share | Subscribe | Hit the 🔔 #LongestCommonPrefix #LeetCode14 #Strings #VerticalScan #SortingTrick #HorizontalScan #PythonDSA #CodeAndDebug #Part220 #InterviewPrep