#include<iostream>
using namespace std;
int main(){
//输出n图形
int n;
cin>>n;
for(int i=1;i<=n;i++){
for(int j=1;j<=n;j++){
if(j==1||j==i||j==n){
cout<<"*";
}else{
cout<<" ";
}
}
cout<<endl;
}
return 0;
}