#include<iostream>
using namespace std;
int main(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        if(i%2==0){
            cout<<" ";
        }
        cout<<"*";
        for(int j=0;j<n-1;j++){
            cout<<" *";
        }
        cout<<"\n";
    }
}