using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var a = NList.Select((ai, id) => (ai, id)).ToList();
        a.Sort((l, r) => l.ai.CompareTo(r.ai));
        var first = new List<int>();
        var second = new List<int>();
        for (var i = 0; i < n; ++i)
        {
            if (i % 2 == 0) first.Add(a[i].id + 1);
            else second.Add(a[i].id + 1);
        }
        second.Reverse();
        first.AddRange(second);
        first.Add(first[0]);
        WriteLine(string.Join(" ", first));
    }
}