n=gets.to_i
a=gets.chomp.split(" ").map(&:to_i)
n_=2*n-3
n_.times do|i|
	n.times do|p_|
		q=i-p_
		if !(q>p_&&n-1>=q)
			next
		elsif a[p_]>a[q]
			w=a[p_]
			a[p_]=a[q]
			a[q]=w
		end
	end
end
print a.join(" ")