Acsl contest #4 2014 2015



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ACSL

Contest #4


2014 - 2015
American Computer Science League

Senior Division



1. Digital Electronics
Translate the circuit

into a simplified

Boolean expression.



3. Data Structures
Create a binary search tree from the string WALTDISNEY and another
binary search tree for DISNEYWORLD. What is the positive difference
between the internal path lengths of each tree?

5. LISP Programming
Evaluate the following LISP expression:
(REVERSE (CAR (CDR (CDR (CAR ‘((a b (c d)) (e (f g)) (h (j k))))))))

4. Data Structures

Create a binary search tree from the string CINDERELLA. Then add,

one at a time, the strings ARIEL, MULAN and BELLE to the original

tree. Which one increases the depth of the tree by the most?



2. Digital Electronics
Which ordered

triples make the circuit


TRUE?


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