func main()
	var n: int :: cui@inputInt()
	var a: []int :: #[n]int
	for i(0, n - 1)
		do a[i] :: cui@inputInt()
	end for
	do a.sort()
	
	if(n % 2 = 1)
		do cui@print("\{a[n / 2]}\n")
	else
		var ans: float :: (a[n / 2] + a[n / 2 - 1]) $ float / 2.0
		do cui@print("\{ans}\n")
	end if
	
end func