#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	cin>>n;
	for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n-i;j++) cout<<" ";    
        for(int j=1;j<=i*2-1;j++)
		{
			if(i==1||i==n) cout<<"*";
			else if(j==1||j==i*2-1)	cout<<"*";
				else cout<<" ";
			}
		cout<<endl;	
		} 
		
        
   return 0;
}

/**************************************************************
	Problem: 1225
	User: lzc
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/