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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5.  
  6.  
  7. int main()
  8. {
  9.     ios_base::sync_with_stdio(false);
  10.     int t;
  11.     cin>>t;
  12.     for(int i = 0; i < t; i++){
  13.         int n;
  14.         cin>>n;
  15.         if(n == 1){
  16.             cout<<-1<<endl;
  17.         }
  18.         else{
  19.             string res = "";
  20.             if(n % 3 == 1){
  21.  
  22.                 for(int j = 0; j < n - 2; j++){
  23.                     res += '2';
  24.                 }
  25.                 res += "33";
  26.             }
  27.             else{
  28.  
  29.                 for(int j = 0; j < n - 1; j++){
  30.                     res += '2';
  31.                 }
  32.                 res += '3';
  33.             }
  34.             cout<<res<<endl;
  35.         }
  36.     }
  37.     return 0;
  38. }
Success #stdin #stdout 0s 4372KB
comments (?)
stdin 
4
1
2
3
4
stdout 
-1
23
223
2233
https://ideone.com/UrrUSU
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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