Ways to Increase LCS by One – GFG POTD | Full Dynamic Programming Explanation

Ways to Increase LCS by One – GeeksforGeeks Problem of the Day (POTD) 🔥 In this video, I break down the "Ways to Increase LCS by One" problem step-by-step using Dynamic Programming. We calculate the LCS from both prefix and suffix directions, then count how many valid single-character insertions increase the LCS length by exactly 1. 📌 Problem: Given two strings s1 and s2, find the number of ways to insert exactly one character into s1 such that the LCS length increases by exactly 1. ✅ Topics covered: Longest Common Subsequence (LCS) recap Prefix DP table & Suffix DP table How insertion at each position affects LCS Counting valid characters using frequency arrays Time & Space Complexity Analysis Full dry run with examples 💻 Code walkthrough included with clean explanation for beginners and interview prep. 🔔 Subscribe for daily GFG POTD solutions, DSA concepts, and coding interview prep! #gfgpotd #dsa #dynamicprogramming #lcs #geeksforgeeks #codinginterview #placement #dsasheet 📚 Practice this problem: (add your GFG link here) If this helped you, drop a like 👍, comment your doubts 💬, and share with friends preparing for coding interviews!