Answered: Note: Your solution should have O(n)…

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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Note: Your solution should have O(n) time complexity, where n is the number of elements in l, and O(1) additional space complexity, since this is what you would be asked to accomplish in an interview.

Given a linked list l, reverse its nodes k at a time and return the modified list. k is a positive integer that is less than or equal to the length of l. If the number of nodes in the linked list is not a multiple of k, then the nodes that are left out at the end should remain as-is.

You may not alter the values in the nodes - only the nodes themselves can be changed.

Note: Your solution should have o(n) time complexity, where n is the number of elements in 1, and o(1) additional space complexity, since this is what you would
be asked to accomplish in an interview.
Given a linked list 1, reverse its nodes k at a time and return the modified list. k is a positive integer that is less than or equal to the length of 1. lf the number of
nodes in the linked list is not a multiple of k , then the nodes that are left out at the end should remain as-is.
You may not alter the values in the nodes - only the nodes themselves can be changed.
Example
• For 1 = [1, 2, 3, 4, 5] and k = 2 , the output should be
solution(1, k) = [2, 1, 4, 3, 5] ;
• For 1 = [1, 2, 3, 4, 5] and k = 1 , the output should be
solution(1, k) = [1, 2, 3, 4, 5] ;
• For 1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11] and k = 3 , the output should be
solution(1, k) = [3, 2, 1, 6, 5, 4, 9, 8, 7, 10, 11] .
Input/Output
[execution time limit] 4 seconds (py3)
• [input] linkedlist.integer I
A singly linked list of integers.
Guaranteed constraints:

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