use strict;
use warnings;

my $n = <>;
my $line = <>;
chomp $line;
my @array = split / /, $line;

@array = sort {$a <=> $b} @array;
my $ans;

if($n % 2 == 0) {
	$ans = $array[$n / 2];
	$ans += $array[($n / 2) - 1];
	$ans /= 2;
} else {
	$ans = $array[($n - 1) / 2];
}

print "$ans\n";

exit;