Codeforces 1326A. Bad Ugly Numbers Solution

 Solution in c++:
     ///**********ALLAH IS ALMIGHTY************///
     ///AH Tonmoy
    ///Department of CSE,23rd batch
    ///Islamic University,Bangladesh

1. #include <bits/stdc++.h>
2. using namespace std;
3. int main()
4. {int t,n;
5. cin >> t;
6. while(t--)
7. { cin >> n;
8. if(n==1)
9. cout<<"-1"<<endl;
10. else
11. cout<<string(n-1,'9')<<8<<endl;
12. }
13. }