1077: 空心菱形

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        int n=cin.nextInt();
        for(int i=1;i<=n;i++)
        {
            for(int j=1;j<=n+i-1;j++)
            {
                if(j==n+i-1||j==n+1-i) System.out.print("*");
                else System.out.print(" ");
            }
            System.out.println();
        }
        for(int i=1;i<n;i++)
        {
            for(int j=1;j<=2*n-i-1;j++)
            {
                if(j==2*n-i-1||j==i+1) System.out.print("*");
                else System.out.print(" ");
            }
            System.out.println();
        }
    }
}