#include <cstdio>
#include <algorithm>
#define nMax 500010

using namespace std;

int n;
int a[nMax];

int main()
{
    freopen ("algsort.in", "r", stdin);
    freopen ("algsort.out", "w", stdout);

    scanf ("%d", &n);
    for (int i = 0; i < n; ++ i){
        scanf ("%d", &a[i]);
    }
    sort (a, a + n);
    for (int i = 0; i < n; ++ i){
        printf ("%d", a[i]);
    }

    return 0;
}