1. Lecture 4
CSE 331
Sep 8, 2010

2. Deadline to form your group passed

3. New tougher deadline If you do not form a group by Sep 14
You will get a ZERO on group leader scribe

4. Only 62 signed forms
I’ll need confirmation in writing. No graded material will be handed back till
I get this signed form from you!

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

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

7. Hence, Brad Pitt is a goat.
The language of proofs
Brad Pitt had a beard
waleg.com
Every goat has a beard
animaldiversity.org
Hence, Brad Pitt is a goat.

8. Questions/Comments?

9. National Resident Matching

10. (Screen) Docs are coming to BUF
Buffalo General
Hawkeye (M*A*S*H)
Millard Filmore (Gates Circle)
JD (Scrubs)
Millard Filmore (Suburban)

11. What can go wrong?

12. The situation is unstable!

13. What happens in real life
Preferences
Information
Preferences

14. NRMP plays matchmaker

15. Stable Marriage Problem
David Gale
Lloyd Shapley