🎯 LeetCode Problem 10 – Regular Expression Matching | Dynamic Programming Explained | DSA with Java

In this video, we solve LeetCode 10: Regular Expression Matching, one of the most challenging pattern matching problems using Dynamic Programming and Recursion. You’ll understand how . and * work in regex matching and how to build a DP-based solution from scratch. 💡 Problem Description Given an input string s and a pattern p, implement regular expression matching with support for . and * where: . → Matches any single character * → Matches zero or more of the preceding element The matching must cover the entire input string (not partial). 📘 Example 1 Input: s = "aa", p = "a" Output: false Explanation: "a" does not match the entire string "aa". 📘 Example 2 Input: s = "aa", p = "a*" Output: true Explanation: '*' means zero or more of the preceding element 'a'. Repeating 'a' once makes it "aa". 📘 Example 3 Input: s = "ab", p = ".*" Output: true Explanation: ".*" means "zero or more of any character". ⚙️ Constraints 1 ≤ s.length ≤ 20 1 ≤ p.length ≤ 20 s contains only lowercase English letters p contains only lowercase English letters, . and * Every * in p has a valid preceding character 📚 Topics Covered: Regular Expressions | Dynamic Programming | Recursion | Pattern Matching | Backtracking | String Manipulation | LeetCode Hard Problems 🔥 Tags / Hashtags: #LeetCode #LeetCodeSolutions #RegularExpressionMatching #DynamicProgramming #Regex #StringMatching #CodingInterview #Java #CPlusPlus #Python #DSA #Algorithms #LeetCodeHard #codingtutorial ✨ What You’ll Learn Here DSA & Coding Concepts (from basics to advanced) Programming Languages (Java, C++, Python, Kotlin, Dart, JS, TS) Development Skills (Web Apps, Flutter, Next.js, React.js) Interview & Placement Preparation Trading & Finance Tools for smart investing 🎓 Who is this for? Beginners in CSE, IT, BCA, MCA Students preparing for placements & coding interviews Developers building skills in Java, C++, Python, Kotlin, Dart, JavaScript, TypeScript Enthusiasts exploring Stock Markets & Trading Tools Anyone who wants to code smarter & trade smarter 💡 Tip for Success: 👉 “The more you practice, the better you become.” Keep coding, solving problems, and building your foundation strong! 📌 Resources & My Work 🔗 GitHub Codes: https://github.com/farhaddubey 🌐 Connect With Me LinkedIn: linkedin.com/in/farhaddubey Instagram: instagram.com/farhaddubey GitHub: github.com/farhaddubey X (Twitter): x.com/farhaddubey 📌 Tags DSA in Java, C++, Python, Kotlin, Dart, JavaScript, TypeScript Coding interview preparation Crack tech interviews Learn coding from scratch Software engineering interviews Placement prep Web & App Development React.js, Next.js, Flutter apps Trading tools explained Stock market basics Tech + Finance + Coding DSA crash course Competitive programming Code smarter, trade smarter