- Practice
- Interview Preparation Kit
- Linked Lists
- Inserting a Node Into a Sorted Doubly Linked List

# 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:

*head*: A reference to the head of a doubly-linked list of*DoublyLinkedListNode*objects.*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: