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#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;
}