Answered: Write a function that takes in the head…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Transcribed Image Text:Write a function that takes in the head of a Singly Linked List and an integer k, shifts the list in place (i.e., doesn't create a brand new list) by k positions, and returns its new head. Shifting a Linked List means moving its nodes forward or backward and wrapping them around the list where appropriate. For example, shifting a Linked List forward by one position would make its tail become the new head of the linked list. Whether nodes are moved forward or backward is determined by whether k is positive or negative. Each LinkedList node has an integer value as well as a next node pointing to the next node in the list or to None / null if it's the tail of the list. You can assume that the input Linked List will always have at least one node; in other words, the head will never be None / null.

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