#include<fstream>
#include<algorithm>
using namespace std;
int n,i,v[500001];
int main()
{	ifstream in("algsort.in");
	ofstream out("algsort.out");
	in>>n;
	for(i=1;i<=n;i++)
		in>>v[i];
	sort(v+1,v+n+1);
	for(i=1;i<=n;i++)
		out<<v[i];
	out<<'\n';
	return 0;
}