#include<iostream>
#include<vector>
#include<algorithm>

using namespace std;

const int N = 1e6+9;

int n,x;

vector<int> v;

int main()
{
cin>>n;
for(int i=0;i<n;i++)
{
int x;
cin>>x;
v.push_back(x);
}

sort(v.begin(),v.end());

v.erase(unique(v.begin(),v.end()),v.end());

for(int i=0;i<v.size();i++)
    cout<<v[i]<<" ";
cout<<endl;

return 0;

}