Package g2801_2900.s2816_double_a_number_represented_as_a_linked_list

Class Solution

java.lang.Object
g2801_2900.s2816_double_a_number_represented_as_a_linked_list.Solution
public class Solution extends java.lang.Object
2816 - Double a Number Represented as a Linked List.

Medium

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.

Example 2:

Input: head = [9,9,9]

Output: [1,9,9,8]

Explanation: 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 <= 9
  • The input is generated such that the list represents a number that does not have leading zeros, except the number 0 itself.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    ListNode
    doubleIt(ListNode head)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details