#include<bits/stdc++.h>
using namespace std;
int main(){
    int i,j,n;
    cin>>n;
    for(i=1;i<=n;i++) {
        for(j=1;j<=n-i;j++){
            cout<<" ";
        }
        for(j=1;j<=2*i-1;j++){
            if(j==1||j==2*i-1||i==n){
                cout<<"*";
            } 
            else{
                cout<<" ";
            }
            }
        cout<<endl;
    }
}
/**************************************************************
	Problem: 1225
	User: hongjiaming
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/