#include <iostream>
#include <iomanip>
#include <vector>
#include <string>
#include <queue>
#include <map>
#include <set>
#include <string>
#include <algorithm>
#include <cmath>

using namespace std;
#define ll long long
#define nl endl
#define cy cout << "YES\n"
#define cn cout << "NO\n"
#define sz s.size()

void sherry()
{
    ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
#endif
}
int main()
{
    sherry();
    ll n;
    cin >> n;
    deque<ll> dq;
    vector<ll> v(n);
    for (ll i = 0; i < n; i++)
    {
        cin >> v[i];
    }
    sort(v.begin(), v.end(), greater<ll>());
    for (ll i = 0; i < n; i++)
    {
        if (v[i] != v[i - 1])
        {
            dq.push_front(v[i]);
        }
        else
        {
            dq.push_back(v[i]);
        }
    }
    for (auto &i : dq)
        cout << i << " ";
    return 0;
}