#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<=2*i-1;j++)  {
            if(i==1||i==n||j==1||j==2*i-1)  cout<<"*";
            else  cout<<" ";
        }
        cout<<endl;
    } 
       
    return 0;
}
/**************************************************************
	Problem: 1225
	User: lidongbo
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/