#include <iostream>
#include <algorithm>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
const int k=30000;
int tab[k];
int main(int argc, char *argv[]) {
	int n;
	cin>>n;
	for(int i=0;i<n;i++)cin>>tab[i];
	sort(tab,tab+n);
	for(int i=n;i>0;i--)cout<<tab[i];
	return 0;
}

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#include <iostream>
#include <algorithm>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
const int k=30000;
int tab[k];
int main(int argc, char *argv[]) {
	int n;
	cin>>n;
	for(int i=0;i<n;i++)cin>>tab[i];
	sort(tab,tab+n);
	for(int i=n;i>0;i--)cout<<tab[i];
	return 0;
}