Problem F
Basic Programming 2

$t$

Action Needed

$1$

Print “Yes” if there are two integers $x \in A$ and $y \in A$ such that $x \neq y$ and $x+y = 7\, 777$,

or “No” otherwise (without the quotes)

$2$

Print “Unique” if all integers in $A$ are different;

or print “Contains duplicate” otherwise (without the quotes)

$3$

Find and print the integer that appears $> \frac{N}{2}$ times in $A$;

or print $-1$ if such integer cannot be found

$4$

Find and print the median integer of $A$ if $N$ is odd;

or print both median integers of $A$ if $N$ is even (separate them with a single space)

$5$

Print integers in $A$ that fall between a range [$100 \ldots 999$] in sorted order;

(print a single space between two integers)