LeetCode 344: Reverse String 🚀 | Best C++ Solution
Welcome back to another LeetCode problem-solving session! In this video, we'll solve LeetCode 344: Reverse String using an efficient Two Pointer approach in C++ and understand how to reverse a character array in-place.
This problem is a classic interview question that helps build intuition for Two Pointers, array manipulation, and in-place algorithms. We'll learn how to reverse a string efficiently without using extra memory.
🎯 In This Video, You'll Learn:
✔️ Complete Problem Explanation
✔️ Understanding the Input and Output
✔️ Brute Force Approach
✔️ Why Extra Space Can Be Avoided
✔️ Two Pointer Technique Explained
✔️ In-Place Swapping
✔️ Step-by-Step Dry Run
✔️ Optimized C++ Solution
✔️ Time Complexity Analysis
✔️ Space Complexity Analysis
✔️ Interview Tips and Common Mistakes
📚 Problem Statement
Write a function that reverses a string.
The input string is given as an array of characters s.
You must modify the input array in-place with O(1) extra memory.
Example:
Input: s = ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]
Explanation:
We swap characters from both ends and move toward the center until the entire string is reversed.
This is a commonly asked interview question because it tests your understanding of:
Two Pointers
Strings
Arrays
In-Place Algorithms
Optimization Techniques
Problem-Solving Skills
💻 Source Code
🔗 GitHub Repository: https://github.com/harshitpandya-cg/
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📌 Recommended LeetCode Playlist
If you're preparing for coding interviews or improving your DSA skills, check out my LeetCode solutions playlist where I explain every problem in a beginner-friendly and interview-focused manner.
🚀 Who Should Watch This Video?
Students learning Data Structures & Algorithms
Beginners practicing LeetCode
Software Engineering Interview Candidates
Competitive Programmers
Anyone learning Strings and Two Pointers
Anyone looking to improve problem-solving skills
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