Package g2801_2900.s2816_double_a_number_represented_as_a_linked_list

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    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 <code>1, 10<sup>4</sup></code>

    • 0 &lt;= Node.val &lt;= 9

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

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final ListNode doubleIt(ListNode head)

      • Methods inherited from class java.lang.Object

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