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

int main() {
    int n;
    vector <int> Num;
    cin>>n;
    for(int i = 0; i < n; ++i)
    {
        int temp;
        cin>>temp;
        Num.push_back(temp);
    }
    sort(Num.begin(), Num.end());
    for(int i = 0, last = -1; i < n; ++i)
    {
        if(last != Num[i])
            {
                cout<<Num[i]<<endl;
                last = Num[i];
            }
    }
}
// 64 位输出请用 printf("%lld")