1. Lecture 2
CSE 331
Aug 30, 2017

2. Enroll on Piazza

3. Read the syllabus CAREFULLY!
No graded material will be handed back till you submit a signed form!

4. You can submit HW 0 + form now

5. Autolab FAQ

6. Allowed Sources

7. … even for programming Q

8. TA Office hours finalized today

9. Questions/Comments?

10. Let the fun begin!

11. Who is Algorithm named after?
Abū ‘Abd Allāh Muhammad ibn Mūsā al-Khwārizmī
9th century Persian astronomer/mathematician
825 AD: “On Calculation with Arabic Numerals”
Latin translation 12th century
“Algorithmi de numero Indorum”

12. What are Algorithms?

14. Don Knuth

15. Don Knuth Reward Checks

16. Knuth’s Definition An algorithm is a finite, definitive, effective
procedure with some input and some
output

17. Remember: Stick with your group

18. Broadband access

19. Erie county is reasonably good

20. One county over

21. Make broadband more available
Say you are tasked to come up with the infrastructure

22. Main Steps in Algorithm Design
Problem Statement
Real world problem
Problem Definition
Precise mathematical def
Algorithm
“Implementation”
Data Structures
Analysis
Correctness/Run time

23. Worst-case analysis Correctness should hold for every valid input
Why worst-case?
Resource usage by the worst-possible input
What resources?

24. Questions/Comments?

25. National Resident Matching

26. (Screen) Docs are coming to BUF
Buffalo General
Bailey (Grey’s Anatomy)
Millard Filmore (Gates Circle)
JD (Scrubs)
Millard Filmore (Suburban)

27. What can go wrong?

28. The situation is unstable!

29. What happens in real life
Preferences
Information
Preferences

30. NRMP plays matchmaker

31. Stable Matching Problem
David Gale
Lloyd Shapley