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Data Structures and Algorithms

by: Trent Dare

Data Structures and Algorithms CS 361L

Marketplace > University of New Mexico > ComputerScienence > CS 361L > Data Structures and Algorithms
Trent Dare
GPA 3.76


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Class Notes
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This 3 page Class Notes was uploaded by Trent Dare on Wednesday September 23, 2015. The Class Notes belongs to CS 361L at University of New Mexico taught by Staff in Fall. Since its upload, it has received 20 views. For similar materials see /class/212205/cs-361l-university-of-new-mexico in ComputerScienence at University of New Mexico.


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Date Created: 09/23/15
39 HW Difficulty I The HW in thiS class iS inherently difficult thiS iS a difficult class You need to be able to solve problems as hard as the prob lems in the book to be competitive with students from other schools Some of these problems require deep thinking However there are things we can do to make things easier CS 361 Lecture 21 Jared Saia University of New Mexico Things you can do 39 Outline Start the hws early You have three resources you can use to do well on the hws Other students a use emailclass list or phone Lab Sections 7 bring specific questions to lab section Office Hours 7 come to these Class Evaluation Binary Trees 39 Evaluatlon Results 39 Things I will do Answer any HW questions at the beginning of class Answer any HW questions emailed to the class mailing list Note You need to start hw early in order to be able to ask me questions about problems you are having Vast majority of students said class pace is just right so pace will stay the same as it is now Major other problem is hw is too difficult 39 HW Questions 39 Red Black Trees RedeBlack trees a kind of binary tree also implement the Dice tionary ADT namely Are there any questions on the current HW Insertx e 0log n time Lookupx e 0log n time Deletex e 0log n time 39 Binary Search Trees 39 Why BST c Q When would you use a Search Tree A1 When need a hard guarantee on the worst case run times eg mission critical code A2 When want something more dynamic than a hash table eg don t want to have to enlarge a hash table when the load factor gets too large c Q What is a search tree A1 It s yet another data structure for implementing the dictionary ADT Q Don t we already know enough of those A NO A3 Search trees can implement some other important op erations 7 10 l l 39 Hash Tables Search Tree Operations 39 Hash Tables implement the Dictionary ADT namely Insert Lookup Insertx 7 01 expected time n worst case I Delete Lookupx 7 01 expected time n worst case I MinimumMaximum Deletex 7 01 expected time n worst case 39 PreaecessorSUCCESSW 8 11


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