import java.util.*;
class main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        if(!sc.has.nextInt()){
            System.out.println("Invalid input");
            return;
        }
        if(n<0){
            System.out.println("Invalid input");
            return;
        }
        int sp=n-1;
        int st=1;
        for(int i=0;i<n;i++){
            for(int j=0;j<sp;j++){
                System.out.print(" ");
            }
            for(int k=0;k<st;k++){
                System.out.print("*");
            }
            System.out.println();
            sp--;
            st+=2;
        }
    }
}