#include <cstdio>
#include <vector>

int main() {
    int T;
    scanf("%d", &T);
    while(T--) {
        int N;
        scanf("%d", &N);
        long long sum = (long long)N * (N + 1) / 2;
        if (sum % 2 != 0) {
            printf("-1\n");
            continue;
        }
        sum /= 2;
        std::vector<int> ans(N + 1);
        for (int i = N; i > 0; i--) {
            if (i <= sum) {
                sum -= i;
                ans[i] = 1;
            }
            if (sum == 0) break;
        }
        if (sum != 0) {
            printf("-1\n");
        } else {
            for (int i = 1; i <= N; i++) {
                printf("%d", ans[i]);
            }
            printf("\n");
        }
    }
    return 0;
}