#include <cstdio>
#include <algorithm>
using namespace std;

const int MAX_N = 500010;

int n;
int a[MAX_N];

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

	return 0;
}