int n;
	cin>>n;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
		if(i==1||i==n||j==1||j==n){
			cout<<"*";
		}
		else cout<<" ";
		}
cout<<endl;
}	
return 0;

}

/**************************************************************
	Problem: 1239
	User: lidongbo
	Language: C++
	Result: Compile Error
****************************************************************/