#include <bits/stdc++.h>

using namespace std;

int a[20000] = {0};

int main() {
    int n;
    cin >> n;
    unordered_map<int, int> _map;
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }
    for (int i = 0; i < n; ++i) {
        if (_map.count(a[i]) == 0) {
            cout << a[i] << " ";
        }
        _map[a[i]]++;
    }
    cout << endl;
    return 0;
}