Sorted Linked List Insertion | Dataford Interview Questions

How do you insert an item into an already sorted linked list while keeping it sorted? Implement the operation for a singly linked list in ascending order, reusing existing nodes and returning the possibly updated head. The input is a Node head and integer value; output is the new Node head. Handle an empty list, insertion before the head, insertion between nodes, insertion after the tail, and duplicate values.

Constraints

The list is singly linked and sorted in nondecreasing order.
0 <= number of existing nodes <= 10^5
-10^9 <= node values, value <= 10^9
The function must reuse existing nodes and return the new head.

Function Signature

def insert_sorted(head, value):

Your question is Sorted Linked List Insertion. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Constraints

The list is singly linked and sorted in nondecreasing order.
0 <= number of existing nodes <= 10^5
-10^9 <= node values, value <= 10^9
The function must reuse existing nodes and return the new head.

Function Signature

def insert_sorted(head, value):

Your question is Sorted Linked List Insertion. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.