ol2_1

#include <iostream>
#include <vector>
#include <algorithm>


using namespace std;


int main()
{
    int n;
    cin>>n;
    vector<long long> v1;
    v1.resize(n);
    for(int i = 0; i < n; i++)
        cin>>v1[i];
    sort(v1.begin(), v1.end());
    auto last = unique(v1.begin(), v1.end());
    v1.erase(last, v1.end());
    for(auto i : v1)
        cout<<i<<' ';

    return 0;
}