#include <bits/stdc++.h>

using namespace std;
void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}
int main() {
    fast_io();
    int n;
    cin >> n;
    vector<int> p(n);
    vector<int> pinv(n);
    set<pair<int, int>> pi, ip;
    for (int i = 0; i < n; i++) {
        cin >> p[i];
        p[i]--;
        pinv[p[i]] = i;
        pi.insert({p[i], i});
        ip.insert({i, p[i]});
    }
    vector<int> ans;
    for (int i = 0; i < n / 2; i++) {
        auto it = pi.begin();
        if (*ip.rbegin() == make_pair(it->second, it->first)) {
            it++;
        }
        auto [p1, i1] = *it;
        auto it_ip = ip.find({i1, p1});
        it_ip++;
        auto [i2, p2] = *it_ip;
        ans.push_back(p1 + 1);
        ans.push_back(p2 + 1);
        pi.erase({p1, i1});
        pi.erase({p2, i2});
        ip.erase({i1, p1});
        ip.erase({i2, p2});
    }
    for (int i = 0; i < n; i++) {
        cout << ans[i] << " \n"[i == n - 1];
    }
}