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🎯 LeetCode Problem 2 – Add Two Numbers | Linked List Explained with Code

In this video, we solve LeetCode 2: Add Two Numbers, a Medium-level Linked List problem.
We’ll break down the logic step by step — from problem statement to dry run and coding in Java / C++ / Python.

💡 Problem Description
You are given two non-empty linked lists representing two non-negative integers.
The digits are stored in reverse order, and each of their nodes contains a single digit.
Add the two numbers and return the sum as a linked list.

You may assume the two numbers do not contain any leading zero, except the number 0 itself.

📘 Example 1
Input: l1 = [2,4,3], l2 = [5,6,4]
Output: [7,0,8]
Explanation: 342 + 465 = 807

📘 Example 2
Input: l1 = [0], l2 = [0]
Output: [0]

📘 Example 3
Input: l1 = [9,9,9,9,9,9,9], l2 = [9,9,9,9]
Output: [8,9,9,9,0,0,0,1]

⚙️ Constraints

Number of nodes in each linked list: [1, 100]

Node value range: 0 ≤ Node.val ≤ 9

No leading zeros except for the number 0 itself

📚 Topics Covered:
Linked List | Addition | Carry Propagation | Data Structures | LeetCode Medium Problems

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#LeetCode #LeetCodeSolutions #AddTwoNumbers #LinkedList #DataStructures #CodingInterview #Java #CPlusPlus #Python #DSA #CodingTutorial #Algorithms #LeetCodeProblem2

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