#include <iostream>
#include <vector>
using namespace std;

int main()
{
    int n, a;
    vector <int> list;
    vector <int> shortList;
    cin >> n;
    for(int i = 0; i < n; i++)
    {
        cin >> a;
        list.push_back(a);
    }

    bool copy = false;
    for (auto it1 = list.begin(); it1 != list.end(); it1++)
    {
        copy = false;
        for (auto it2 = it1 + 1; it2 != list.end(); it2++)
        {
            if(*it1 != *it2)
            {
                copy = true;
            }
        }

        if(copy)
        {
            shortList.push_back(*it1);
        }
    }

    for(int i = 0; i < shortList.size(); i++)
    {
        cout << shortList[i] << " ";
    }
    return 0;
}