Algorithm Design and Analysis

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Algorithm Design and Analysis 4th Semester Computer Engineering Spring 2018 Conf.dr.ing. Ioana Ṣora ioana.sora@cs.upt.ro http://staff.cs.upt.ro/~ioana/algo/

design algorithms that are correct and efficient Our goal: design algorithms that are correct and efficient

Designing Algorithms Where do algorithm solutions come from ? Clever people already designed a plethora of solutions (algorithms) for different problems and we find them in textbooks, internet, etc. But how will you design solutions for new problems which are not exactly the ones in the textbooks ?

How to learn algorithms ? http://www.neatorama.com/twaggies/2010/11/07/no-112-robcorddry/

Kruskal’s algorithm Prim’s algorithm Design methods: Backtracking = Forbidden  Greedy Design by Induction Divide and Conquer Dynamic Programming Floyd’s algorithm Dijkstra’s algorithm Tarjan’s algorithm

What about data structures ? Fundamental data structures: Model fundamental data Examples: lists, queues, stacks, hashtables, etc In this class you can make use of libraries providing implementations of these (such as: Java Collections, C++ STL Containers) Special data structures: Created to optimize a specific (set of) operation(s) for a specific context of a specific class of algorithms Examples: Search trees, balanced trees, optimal trees, disjoint sets, graphs, etc

Course Goals Learn to design algorithms that are correct and efficient How do we know that: an algorithm is correct ? -> correctness proofs an algorithm is efficient ? -> analysis of algorithms (time complexity) How to design solutions for new problems ? Learning general techniques for design Studying a set of well-known algorithms, to serve as examples of success stories for applying general design techniques Become aware that good algorithms are key parts of software engineering practice ! -> optional tool projects

Examination and Grading Final grade = 2/3 final written exam + 1/3 work during the semester Written exam: Short questions , Algorithm design problems, Algorithm implementation problems Work during the semester: Each lecture topic is followed (next week) by an associated lab session. Have to come prepared to the lab ! Lab class activity, including tests (on paper and on computer) Lab assignments, homeworks Tool projects – optional – weight: 10 % Optional award points: for exceptional activity = doing more than one optional tool project during the semester, you can gain extra-points to the grade of your final written exam

Textbooks [CLRS] [Unlocked] [Manber] [McCormick]

Course Webpage All official information related to the Algorithm Design and Analysis classes: http://staff.cs.upt.ro/~ioana/algo/