LeetCode 24 🔥 Swap Nodes in Pairs | Linked List C++ | Step-by-Step Explanation

In this video, we solve LeetCode Problem 24: Swap Nodes in Pairs using an efficient Linked List approach in C++.

You will learn:
- How to swap nodes in pairs without changing values
- Proper pointer manipulation in Linked List
- Use of dummy node to simplify edge cases
- Step-by-step line-by-line explanation
- Time and Space Complexity analysis

Problem Summary:
Given a linked list, swap every two adjacent nodes and return its head. You must solve the problem without modifying the values in the list nodes.

Example:
Input: head = [1,2,3,4]
Output: [2,1,4,3]

Approach Used:
We use a dummy node and pointer manipulation to swap nodes in pairs while maintaining the correct links in the list.

Time Complexity: O(n)
Space Complexity: O(1)

This is an important Linked List problem frequently asked in coding interviews.

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Видео LeetCode 24 🔥 Swap Nodes in Pairs | Linked List C++ | Step-by-Step Explanation канала KREYA PANCHAL