Leetcode Problem 2816. Double a Number Represented as a Linked List

2816. Double a Number Represented as a Linked List

Leetcode Solutions

Reverse, Double, and Reverse Approach

  1. Reverse the input linked list.
  2. Initialize a variable carry to 0.
  3. Traverse the reversed list, doubling each node's value and adding the carry.
  4. Update the carry for the next node.
  5. If there is a carry after processing the last node, create a new node with the carry value.
  6. Reverse the list again to restore the original order with the updated values.
UML Thumbnail

Iterative In-Place Doubling with Carry

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