Reverse String | Leetcode 344(C++)
🚀 LeetCode 344 — Reverse String | C++ Solution Explained
In this video, we solve LeetCode Problem 344 – Reverse String in a simple and beginner-friendly way using C++.
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📌 TOPICS COVERED
✅ Strings
✅ Two Pointers
✅ In-Place Modification
✅ Swapping
✅ Array Traversal
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📌 PROBLEM OVERVIEW
Given a character array s, reverse the array in-place.
👉 You must modify the input array directly using O(1) extra memory.
Example:
Input:
s = ['h','e','l','l','o']
Output:
['o','l','l','e','h']
Explanation:
Swap characters from both ends of the array and move the pointers toward the center until the string is completely reversed.
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🛠️ APPROACH COVERED
✅ Initialize two pointers (left and right)
✅ Swap the characters at both pointers
✅ Move the pointers toward the center
✅ Continue until the pointers meet or cross
Method → Two Pointers
Language → C++
Time → O(n)
Space → O(1)
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🎯 WHAT YOU WILL LEARN
✔ Using the Two Pointers technique
✔ Reversing strings in-place efficiently
✔ Swapping elements in C++
✔ Writing clean and optimized C++ code
✔ Time & space complexity analysis
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