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Database System Concepts
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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class Node(): def __init__(self, val = self.val = val self.next = None def remove_dups (head): |||||| Time Complexity: O(N) Space Complexity: O(N) |||||| hashset = set() prev = Node() while head: if head.val in hashset: prev.next = head.next else: hashset.add(head.val) prev = head head head.next def remove_dups_wothout_set(head): I!!!! Time Complexity: 0(N^2) Space Complexity: 0(1) current head while current: None): runner = current while runner.next: if runner.next.val == current.val: runner.next = runner.next.next else: runner = runner.next current = current.next def print_linked_list(head): string = |||| while head.next: string += head.val + head head.next string += head.val print(string) # AABCD CFG a1 = Node("A") a2 = Node("A") = Node("B") c1 = Node("C") = Node("D") c2 = Node("C") f = - Node("F") g = Node("G")
Transcribed Image Text:class Node(): def __init__(self, val = self.val = val self.next = None def remove_dups (head): |||||| Time Complexity: O(N) Space Complexity: O(N) |||||| hashset = set() prev = Node() while head: if head.val in hashset: prev.next = head.next else: hashset.add(head.val) prev = head head head.next def remove_dups_wothout_set(head): I!!!! Time Complexity: 0(N^2) Space Complexity: 0(1) current head while current: None): runner = current while runner.next: if runner.next.val == current.val: runner.next = runner.next.next else: runner = runner.next current = current.next def print_linked_list(head): string = |||| while head.next: string += head.val + head head.next string += head.val print(string) # AABCD CFG a1 = Node("A") a2 = Node("A") = Node("B") c1 = Node("C") = Node("D") c2 = Node("C") f = - Node("F") g = Node("G")
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