: In function 'int main()':
:15:24: error: expected ';' before ')' token
   15 |         for(int i=0;i<n){
      |                        ^
      |                        ;
:16:20: error: 'cnt' was not declared in this scope; did you mean 'int'?
   16 |                 if(cnt++)cout<<endl;
      |                    ^~~
      |                    int