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  1. Practice
  2. Data Structures
  3. Linked Lists
  4. Inserting a Node Into a Sorted Doubly Linked List

Inserting a Node Into a Sorted Doubly Linked List

Given a reference to the head of a doubly-linked list and an integer, , create a new DoublyLinkedListNode object having data value and insert it into a sorted linked list while maintaining the sort.

Function Description

Complete the sortedInsert function in the editor below. It must return a reference to the head of your modified DoublyLinkedList.

sortedInsert has two parameters:

  1. head: A reference to the head of a doubly-linked list of DoublyLinkedListNode objects.
  2. data: An integer denoting the value of the field for the DoublyLinkedListNode you must insert into the list.

Note: Recall that an empty list (i.e., where ) and a list with one element are sorted lists.

Input Format

The first line contains an integer , the number of test cases.

Each of the test case is in the following format:

  • The first line contains an integer , the number of elements in the linked list.
  • Each of the next lines contains an integer, the data for each node of the linked list.
  • The last line contains an integer which needs to be inserted into the sorted doubly-linked list.

Constraints

Output Format

Do not print anything to stdout. Your method must return a reference to the of the same list that was passed to it as a parameter.

The ouput is handled by the code in the editor and is as follows:
For each test case, print the elements of the sorted doubly-linked list separated by spaces on a new line.

Sample Input

1
4
1
3
4
10
5

Sample Output

1 3 4 5 10

Explanation

The initial doubly linked list is: .

The doubly linked list after insertion is: