/*
 * File:   main.cpp
 * Author: petru
 *
 * Created on 2010-09-25
 */


#include <cstdio>
#include <algorithm>
#define deb(n) fprintf(stderr,"%d ",(n));
#define DN 500001
using namespace std;

int n,v[DN];

int main()
{
	int i;
	freopen("algsort.in","r",stdin);
	freopen("algsort.out","w",stdout);
	scanf("%d",&n);
	for(i=1; i<=n; ++i) scanf("%d",&v[i]);
	sort(v+1,v+n+1);
	for(i=1; i<=n; ++i) printf("%d",v[i]);
	return 0;
}