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

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


    return 0;
}