Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Need help. Its in C++. Whats the main idea here

[画像:P3: Remove Duplicates from a Sorted Doubly Linked List (15 points) Problem Description: You are given a sorted doubly linked list. Your task is to implement a function removeDuplicates that removes all duplicate elements from the list, leaving only distinct elements. Input: Sorted Doubly Linked List: 1 <=> 2 <=> 2 <=> 3 <=> 4 <=> 4 <=> 4 <=> 5 Output: Doubly Linked List after Removing Duplicates: 1 <=> 2 <=> 3 <=> 4 <=> 5 Explanation: The provided input is a sorted doubly linked list with some duplicate elements. The removeDuplicates function is applied to remove duplicate elements, leaving only distinct values in the list. The duplicates are removed as follows: The second occurrence of 2 is removed. Two of the three occurrences of 4 is removed. The resulting doubly linked list contains only distinct values in ascending order: 1 <=> 2 <=> 3 <=> 4 <=> 5]
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Transcribed Image Text:P3: Remove Duplicates from a Sorted Doubly Linked List (15 points) Problem Description: You are given a sorted doubly linked list. Your task is to implement a function removeDuplicates that removes all duplicate elements from the list, leaving only distinct elements. Input: Sorted Doubly Linked List: 1 <=> 2 <=> 2 <=> 3 <=> 4 <=> 4 <=> 4 <=> 5 Output: Doubly Linked List after Removing Duplicates: 1 <=> 2 <=> 3 <=> 4 <=> 5 Explanation: The provided input is a sorted doubly linked list with some duplicate elements. The removeDuplicates function is applied to remove duplicate elements, leaving only distinct values in the list. The duplicates are removed as follows: The second occurrence of 2 is removed. Two of the three occurrences of 4 is removed. The resulting doubly linked list contains only distinct values in ascending order: 1 <=> 2 <=> 3 <=> 4 <=> 5
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