using System.Collections;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

internal class Program
{
    private const long mod = 998244353;
    

    public static void Main(string[] args)
    {
        var t = int.Parse(Console.ReadLine());
        while (t-->0)
        {
            int n = int.Parse(Console.ReadLine());
            int sum = n * (n + 1) / 2;
            if (sum % 2!=0)
            {
                Console.WriteLine(-1);
            }
            else
            {
                string ans = "";
                int rest = sum / 2;
                for (int i = n; i >= 1; i--)
                {
                    if (rest >= i)
                    {
                        rest -= i;
                        ans += '1';
                    }
                    else
                    {
                        ans += '0';
                    }
                }

                ans = String.Join("", ans.Reverse());
                Console.WriteLine(ans);
            }
        }
    }

    public static List<int> mkar(int n, int val)
    {
        List<int> res = new List<int>(n);
        for(int i=0;i<n;i++)res.Add(val);
        return res;
    }
}