Consider the following pseudo code. Assume that IntQueue is an integer queue. What does the function fun do$?$

void fun$($int $n)$

$\{$

IntQueue $q=$ new IntQueue$()$;

q$.$enqueue $()$;

q$.$enqueue $(1)$;

for $($int $i=0$; $a=q*b=q(a+b)i$

$\{$

int $a=q*$ dequeue $()$ ;

int $b=q.$dequeue $()$ ;

$q.$enqueue $(b)$;

$q.$enqueue $(a+b)$;

print$(a)$;

$\}$