#include <iostream>
using namespace std;
int main()
{
    int n;
    cin >> n;
    int arr[n];

    for ( int i = 0 ; i < n ; i ++ )
    {
        cin >> arr[i];
    }

    for ( int y = 0 ; y < n - 1 ; y ++ )
    {
        for ( int i = n ; 1 < i ; i -- )
        {
            if ( arr[i - 1] < arr[i - 2])
            {
                swap ( arr[i - 1] , arr[i - 2] );
            }
        }

    }

    for ( int i = 0 ; i < n ; i ++ )
    {
        cout << arr[i];
    }

    return 0;
}