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American Computer Science League Junior Division 2012 - 2013 Contest #2

The document contains problems from the American Computer Science League Junior Division Contest #2 for 2012-2013. It includes tasks related to evaluating prefix expressions, converting infix to postfix expressions, and evaluating bit-string operations. Additionally, it features a programming problem that requires determining the output of a given code segment.

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34 views1 page

American Computer Science League Junior Division 2012 - 2013 Contest #2

The document contains problems from the American Computer Science League Junior Division Contest #2 for 2012-2013. It includes tasks related to evaluating prefix expressions, converting infix to postfix expressions, and evaluating bit-string operations. Additionally, it features a programming problem that requires determining the output of a given code segment.

Uploaded by

CK
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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ACSL

2012 - 2013 American Computer Science League Contest #2


Junior Division

1. Prefix/Infix/Postfix
Evaluate the following prefix expression if all numbers are single
digits:
+ /+ 2 4 3 / * 4 + / 6 2 1 8

2. Prefix/Infix/Postfix
Convert the infix expression to a postfix expression.

A + B + C*(A – B)
C B+C

3. Bit-String Flicking
Evaluate the following expression:

(NOT (01101 OR 01011)) AND ( 01101 OR 00101)

4. Bit-String Flicking
Evaluate the following expression:

(LCIRC-2 (RSHIFT – 1 (RCIRC – 1 (LSHIFT – 1 01101))))

5. What Does This Program Do?


What is printed when this program is executed?

Z=0
FOR N = 100 TO 200 STEP 2
IF (N/3) = INT(N/3) THEN Z = Z + 1
IF (N/5) = INT(N/5) THEN Z = Z + 1
IF N/3 = INT(N/3) AND N/5 = INT(N/5) THEN Z=Z-1
NEXT N
PRINT Z
END

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