#include <fstream>
#include <algorithm>
#define IN "algsort.in"
#define OUT "algsort.out"

using namespace std;

const int MAX= 500014;

ifstream fin(IN);
ofstream fout(OUT);
int v[MAX];

int main()
{
    int n;
    fin>>n;
    for(register int i=1 ;i<=n;i++)
        fin>>v[i];
    sort(v+1,v+n+1);
    for(register int i=1;i<=n;i++)
        fout<<v[i];
    return 0;
}