#include <bits/stdc++.h>
using namespace std;

using ll = long long;
#define rep(i, n) for(int i = 0; i < n; i++)

int main() {
	int T;
	cin >> T;
	rep(i, T) {
		int N;
		cin >> N;
		int sum = N * (N + 1) / 2;
		if( sum % 2 ) cout << -1 << endl;
		else {
			sum /= 2;
			string s(N, '0');
			for(int j = N - 1; j >= 0; j--) {
				int n = j + 1;
				if(n <= sum) {
					s[j] = '1';
					sum -= n;
					if( sum == 0) break;
				}
			}
			cout << s << endl;
		}
	}
}