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Grokking the Coding Interview Patterns in C#

Solution: Add Two Numbers

Explore how to add two numbers stored as reversed linked lists by simulating digit-by-digit addition with carry. Understand the algorithm for constructing a new linked list result efficiently, and analyze its time and space complexity.

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Statement

You are given two non-empty linked lists, where each list represents a non-negative integer.
The digits are stored in reverse order, and each node contains exactly one digit.

Your task is to add the two integers and return the result as a linked list, also stored in reverse order.

You may assume that neither number has leading zeros, except the number 00 itself.

Constraints:

  • The number of nodes in each linked list is in the range [1,100][1, 100].

  • 0≤0 \leq Node.val ≤9\leq 9 ...