#include <bits/stdc++.h>
using namespace std;

int main() {
    int n; cin >> n;
    vector<bool> frq(300001);
    for (int i = 0; i < n; i++) {
        int x; cin >> x;
        frq[x] = true;
    }

    for (int i = 1; i <= 300000; i++)
        if (frq[i])
            cout << i << ' ';
    cout << '\n';
    return 0;
}