Given a singly-linked list and an integer k. Define an operation named "Rotation", which means moving the tail of the list to the head position. For example, Linked List: [2] -> [4]-> [5] -> [1]. K=1 After "Rotation" for K times, we will have [1] -> [2] -> [4] -> [5]. If we change the K from 1 to 3. The linked list would become: [4]-> [5] -> [1] -> [2] The definition of List Node in C++ is as following: struct ListNode { int val; ListNode *next; I ListNode() : val(0), next(nullptr) {} ListNode(int x) : val(x), next(nullptr) } ListNode(int x, ListNode "next) : val(x), next(next) {} a. Please complete the following function named "rotate". It's okay to write pseudo code, but the pointers operations need to be correct. (Pointer operation is the core of linked list.) The return value and parameters are provided. (The function should return the head pointer after rotation.) Boundary conditions need to be considered and shown in your code. ListNode * rotate(ListNode" head, int k){ //Please write your code here.

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
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Given a singly-linked list and an integer k. Define an operation named "Rotation", which means moving the tail of the list to the head position. For example,
Linked List: [2]-> [4] -> [5] -> [1]. K=1
After "Rotation" for K times, we will have [1] -> [2] -> [4] -> [5].
If we change the K from 1 to 3. The linked list would become: [4] -> [5] -> [1] -> [2]
The definition of List Node in C++ is as following:
struct ListNode {
int val;
ListNode *next;
ListNode() : val(0), next(nullptr) {}
ListNode(int x) : val(x), next(nullptr) {}
ListNode(int x, ListNode *next) : val(x), next(next) {}
}3;
a. Please complete the following function named "rotate". It's okay to write pseudo code, but the pointers operations need to be correct. (Pointer operation is the
core of linked list.) The return value and parameters are provided. (The function should return the head pointer after rotation.) Boundary conditions need to be
considered and shown in your code.
ListNode * rotate(ListNode* head, int k){
//Please write your code here.
b. What is the complexity in the last question? Is it the lower bound of this function? If not, what's the lower bound?
Transcribed Image Text:Given a singly-linked list and an integer k. Define an operation named "Rotation", which means moving the tail of the list to the head position. For example, Linked List: [2]-> [4] -> [5] -> [1]. K=1 After "Rotation" for K times, we will have [1] -> [2] -> [4] -> [5]. If we change the K from 1 to 3. The linked list would become: [4] -> [5] -> [1] -> [2] The definition of List Node in C++ is as following: struct ListNode { int val; ListNode *next; ListNode() : val(0), next(nullptr) {} ListNode(int x) : val(x), next(nullptr) {} ListNode(int x, ListNode *next) : val(x), next(next) {} }3; a. Please complete the following function named "rotate". It's okay to write pseudo code, but the pointers operations need to be correct. (Pointer operation is the core of linked list.) The return value and parameters are provided. (The function should return the head pointer after rotation.) Boundary conditions need to be considered and shown in your code. ListNode * rotate(ListNode* head, int k){ //Please write your code here. b. What is the complexity in the last question? Is it the lower bound of this function? If not, what's the lower bound?
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