Add Two Integers Represented by Linked Lists
Explore how to add two integers represented by linked lists where each node stores a digit. Understand the process of summing these digits starting from the least significant one, managing carries, and handling varying lengths. This lesson prepares you to implement this common linked list algorithm efficiently.
Statement
We are given the head pointers of two linked lists, each linked list represents an integer number (each node is a digit). Add them and return the resulting linked list (i.e., sum).
Here, the first node in a list represents the least significant digit.
Example
Sample input
[1, 0, 9, 9]
[7, 3, 2]
Expected output
[8, 3, 1, 0, 1]
Constraints
Only one positive digit (between and ...