#include <fstream>

using namespace std ;

ifstream fin("date.in")
ofstream fout("date.out")

int a[100], i, j, aux, sw;

int main()
{
    fin>>n;
        for(i=1; i<=n-1;i++) fin>>a[i]
        do
        {
            sw=1;
            for(i=1;i<=n-1;i++)
                if(a[i]>a[j])
                {
                    aux=a[i];
                    a[i]=a[i+1];
                    a[1+i]=aux;
                    sw=o;
                }
        }
        while(sw=0);
        for(i=1; i<=n; i++) fout<<a[i];
        fin.close(); fout.close();
        return 0;
}