1. Lynbrook Computer Science Monday, December 7 th, 2009

2. American Computer Science League (ACSL) Fun computer science contest Written portion ▫5 questions, 40 minutes Programming portion ▫Free response, take home, 72 hours

3. Divisions Senior division ▫APCS students ▫Advanced computer science concepts Intermediate division ▫JAVA students ▫Intermediate computer science concepts

4. Topics Covered LISP ▫(CDR ’((2 (3))(4 (5 6) 7))) Computer Number Systems ▫X 16 = 3676 8 Recursion ▫y = f (f (x-2))+1 if x > 1; y = 1 if x = 1 IF-THEN-ELSE ▫Programming Portion ▫if ( ) { } else { }

5. Scoring Written portion ▫5 questions, 5 points Programming portion ▫1 question, 5 test cases, 5 points Total score = out of ten ▫int totalScore = written.computeScore() + program.computeScore(); ▫0 <= totalScore <= 10

6. Team placement Team for each division 5 members per team Top 5 total scores from each division are sent

7. Extra Credit! APCS students ▫Only awarded for Senior Division JAVA students ▫Awarded for any division Both parts must be taken for extra credit No late submissions accepted!

8. Dates Programming portion ▫Prompt distributed on Friday, 12/11/09 ▫Program Due online by 10:00AM on Monday, 12/14/09 Written portion ▫Taken during lunch on Monday, 12/14/09, in Mr. Peck’s room