How to Solve Double a Number Represented as a Linked List Problem
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Double a Number Represented as a Linked List
You are given the head of a non-empty linked list representing a non-negative integer without leading zeroes. Return the head of the linked list after doubling it.
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Understanding the Double a Number Represented as a Linked List Problem
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Problem Statement
You are given the head of a non-empty linked list representing a non-negative integer without leading zeroes. Return the head of the linked list after doubling it.
Double a Number Represented as a Linked List
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Examples
head = [1,8,9][3,7,8]The figure above corresponds to the given linked list which represents the number 189. Hence, the returned linked list represents the number 189 * 2 = 378.
head = [9,9,9][1,9,9,8]The figure above corresponds to the given linked list which represents the number 999. Hence, the returned linked list reprersents the number 999 * 2 = 1998.
Constraints
The number of nodes in the list is in the range [1, 104]0 <= Node.val <= 9The input is generated such that the list represents a number that does not have leading zeros, except the number 0 itself.How Interview Coder Helps with Leetcode Problems
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