#include <iostream>
using namespace std;

int main()
{
    int T;
    cin >> T;

    while (T--)
    {

        int N;
        cin >> N;
        int n = 0;
        for (int i = 1; i <= N; i++)
        {
            n += i;
        }
        if (n % 2 == 0)
        {
            if (n / 2 <= N)
            {
                for (int i = 0; i < n / 2; i++)
                {
                    cout << 0;
                }
                for (int i = 0; i < N - n / 2; i++)
                {
                    cout << 1;
                }
                cout << endl;
            }
            else
            {
                for (int i = 0; i < N; i++)
                {
                    cout << 0;
                }
                cout << endl;
            }
        }
        else
        {
            cout << -1 << endl;
        }
    }
}