LeetCode POTD 3302 | Find the Lexicographically Smallest Valid Sequence | Explained

🚀 LeetCode POTD 3302: Find the Lexicographically Smallest Valid Sequence In this video, we solve one of the most interesting Hard LeetCode Problems and learn how to optimize the solution from brute force thinking to an efficient greedy approach. 📂 Source Code: https://github.com/Krishnkantm/DSA-Co... ✅ Approaches Covered 🔥 Approach 1: Brute Force Intuition 🔥 Approach 2: Optimal Greedy Solution ✅ Lexicographical Order Explained ✅ One Mismatch Observation ✅ Suffix Matching Optimization ✅ Right Array Precomputation ✅ Step-by-Step Dry Run ✅ Optimal C++ Implementation ✅ Time & Space Complexity Analysis 📌 Topics Covered Greedy Algorithms Strings Lexicographical Order Precomputation Suffix Matching Arrays Competitive Programming 💡 Key Insight Instead of checking all possible sequences, we precompute how many characters of word2 can still be matched on the right side. This allows us to greedily choose the smallest possible index while ensuring the remaining characters can still form a valid sequence. The result is an efficient solution that constructs the lexicographically smallest valid sequence. 🎯 This Video is Helpful For ✔ LeetCode POTD Preparation ✔ String Problems ✔ Greedy Algorithms ✔ Coding Interviews ✔ Competitive Programming This problem is a great example of logic building, where brute force intuition leads to an elegant greedy optimization. 🔔 Subscribe to Logic Mode for daily LeetCode POTD, GFG POTD, DSA, Competitive Programming, and Interview Preparation content. #LeetCode3302 #LexicographicallySmallestValidSequence #Greedy #Strings #CPP #DSA #CodingInterview #CompetitiveProgramming #LogicMode