#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;
int main(){
int n;
cin>>n;
int current;
vector<int> nums;
for(int i = 0; i < n; i++){
cin >> current;
nums.push_back(current);
}
sort(nums.begin(), nums.end());
auto newlist = unique(nums.begin(), nums.end());
nums.erase(newlist, nums.end());
for(auto nu: nums){
cout<<nu<<endl;
}
return 0;
}