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

long M[500005];

int main(void)
{
 long N,i;
 fstream fin("algsort.in",ios::in);
 fstream fout("algsort.out",ios::out);
 fin >> N;
 for (i = 0;i < N;i += 1)
  {
   fin >> M[i];
  }
 sort(M + 0,M + N);
 for (i = 0;i < N;i += 1)
  {
   fout << M[i];
  }
 fin.close();
 fout.close();
 return 0;
}