#include <iostream>
#include<algorithm>
#include<string>
#include<stack>
#include<iomanip>
#include<cmath>
#include<set>
#include<unordered_set>
#include<iterator>
#include<cstring>
#include<vector>
using namespace std;
int main()
{
	int n;
	cin >> n;
	unordered_set<int>st;
	int* a = new int[n];
	for (int i = 0; i < n; ++i)
	{
		cin >> a[i];
		st.insert(a[i]);
	}
	unordered_set<int>::iterator i;
	for (i = st.begin(); i != st.end(); ++i)
	{
		cout << *i << " ";
	}cout << endl;

	return 0;
}