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Double a Number Represented as a Linked List

medium Solve on LeetCode

Last edited: August 2, 2025

Problem
Examples
Solution
Method 1 - Reverse the linked list
Algorithm
Dry Run
Code
Complexity
Method 2 - Iteratively using next val
Algorithm
Code
Complexity

Related Tags

arithmetic array binary-search bit-manipulation combinatorics counting database dynamic-programming enumeration graph greedy hash-table leetcode linkedlist math monotonic-stack number-theory ordered-set prefix-sum sliding-window sorting string strongly-connected-component tree two-pointers

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