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Technical2026-08-12

Solve a linked list problem involving adding two numbers represented as linked lists.

AI-Expanded — inferred from the question title, not from the original candidate report

You are given two non-empty linked lists representing two non-negative integers, where each node contains a single digit and the digits are stored in reverse order. Write a function to add the two numbers and return the sum as a new linked list in the same reverse-order format.

Context & Summary

A 1-hour technical interview focusing on two DSA questions: one involving linked lists (adding two numbers) and another tree-based problem (finding the root node and constructing the tree from given parent-child relationships).

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Code editors are too cramped on mobile screens.