#include <iostream>
#include <fstream>
#include <set>
#include <vector>

#define pb push_back
#define in insert

using namespace std;

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

set <int>s;
set <int>::iterator it;

int main()
{
    int i,j,n,x,p;
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>x;
        s.in(x);
    }
    for(it=s.begin();it!=s.end();it++)
    fout<<*it<<' ';
}