Two Pointer Pattern Explained with 3 Problems in C++ | DSA Interview Prep | Code With Bhupi Hindi

🚀 *Master the Two Pointer Pattern in DSA with C++!* Struggling with array and string problems in Data Structures and Algorithms? In this video, you'll learn the *Two Pointer Pattern* from scratch and understand how to use it to solve coding interview problems efficiently. On **Code with Bhupi**, we focus on understanding the logic behind DSA patterns—not just memorizing code. In this tutorial, we'll cover 3 important problems step by step, with examples, dry runs, and C++ implementations. 📌 *WHAT YOU WILL LEARN* ✅ What is the Two Pointer Pattern? ✅ When and why should you use two pointers? ✅ How to move pointers intelligently ✅ How to optimize solutions and analyze time complexity ✅ Common mistakes to avoid while solving two-pointer problems 💻 *PROBLEMS COVERED* *1. Reverse an Array* Learn how to reverse an array in place using left and right pointers. Pattern: Opposite-direction pointers Time Complexity: O(n) Auxiliary Space: O(1) *2. Valid Palindrome* Learn how to compare characters from both ends of a string to check whether it is a palindrome. Pattern: Opposite-direction pointers Time Complexity: O(n) Auxiliary Space: O(1) *3. Two Sum II — Input Array Is Sorted* Learn how to find two numbers that add up to a target using a sorted array and two pointers. Pattern: Sorted array + two pointers Time Complexity: O(n) Auxiliary Space: O(1) 🎯 *WHO SHOULD WATCH THIS VIDEO?* Beginners learning DSA in C++ Students preparing for coding interviews Programmers practising LeetCode problems Candidates preparing for product-based companies and FAANG interviews 🔥 *YOUR PRACTICE CHALLENGE* Try solving the *3Sum problem* next. Sort the array, fix one element, and use two pointers to find triplets. 💬 Comment below: Which of these three problems did you find most challenging? 👍 Like the video if it helped you. 🔔 Subscribe to *Code with Bhupi* for more DSA tutorials, C++ coding techniques, interview patterns, and problem-solving tips. 📚 *Learn DSA systematically with Code with Bhupi* Understand the pattern. Build the logic. Crack the interview. #TwoPointer #DSA #Cpp #CodingInterviews #LeetCode