#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    int n, t, s;
    cin >> t;
    while(t--){
        cin >> n;
        s = n*(n+1)/2;
        if (s%2 != 0){
            cout << -1 << endl;
            continue;
        }
        s /= 2;
        string ans(n, '0');
        for (int i=n; i>=1; i--){
            if (s-i >= 0){
                ans[i-1] = '1';
                s -= i;
            }
        }
        cout << ans << endl;
    }

    return 0;
}