2816. Double a Number Represented as a Linked List by Amit Yadav
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Leetcode problem link : https://leetcode.com/problems/double-...
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.
Example 1:
Input: head = [1,8,9]
Output: [3,7,8]
Explanation: 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.
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