#include <iostream>
#include <set>
using namespace std;

int main(){
    int n;
    set<int> s;
    cin >> n;
    
    for (int i = 0; i < n; i++) {
        int num;
        cin >> num;
        s.insert(num);
    }

    for (const auto& elem : s) {
        cout << elem << " ";
    }
    cout << endl;

    return 0;
}