//https://infoarena.ro/problema/algsort

#include <iostream>
#include <fstream>
#include <algorithm>

using namespace std;

ifstream fin ("algsort.in");
ofstream fout ("algsort.out");

const int NRMAX = 500000;

int v[NRMAX];
int main()
{
    int n, i;

    fin >> n;
    for (i = 0; i < n; ++i)
    {
        fin >> v[i];
    }

    sort (v, v + n);

    for (i = 0; i < n; ++i)
    {
        fout << v[i];
    }

    return 0;
}