ol_5_11

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


using namespace std;

int main()
{
    ifstream cin("input.txt");

    int n;
    cin>>n;

    vector <int> v(n);
    for (int i = 0; i < n; i++)
        cin>>v[i];

    vector <int> t(n+1, 0);
    for (int i = 0; i <= n; i++)
        t[v[i]]++;

    for (int i = 0; i < n; i++)
        if (t[v[i]]!=0)
        {
            cout<<v[i]<<" ";
            t[v[i]]=0;
        }
}