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

int tmp;
set<int> a;

int main() {
    int n;
    cin >> n;
    for(int i = 0; i < n; ++i){
        cin >> tmp;
        a.insert(tmp);
    }
 
    
    for(auto x : a){
        cout << x << endl;
    }
 

}