Question $20(3$ points$)$

Q$20.$ Suppose a computer program has been initialized such that the following sets have been stored for use in any algorithm:

$A=\{1,2,3,$dots,$47\}$

$B=\{-7,-6,-5,$dots,$20\}$

Consider the following algorithm, which represents one part of the whole computer program $($comments may occur after the # symbol on any line and are not used in computations$)$:

#Part $1$: computes A $-$ B and its cardinality

AminusB $)$

for element in $A$ : # this line runs through every element in $A$

if not$($element in B$)$: #A $-$ B is the set of elements that are in A and are not in B

AminusB.add$($element$)$ # Add to AminusB every element in A if the element is also not in $B$

$)$ #len$()$ returns the number of elements in the array print$($n$)$

What value is printed as a result of executing this algorithm?

Your Answer: