text: #include <iostream>
  
  using namespace std;
  
  int main(){
      int n;
      cin>>n;
      for (int i = 0; i <n; i++)
      {
         for (int j  =0; j<n; j++)
         { if( i==0 || j==0 || i==n-1 || j==n-1)
            cout<<"* ";
            else cout<<"  ";
         }
         cout<<"\n";
      }
      
      return 0;
  }