题解 | #菱形图案#

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while(scan.hasNextInt()) {
            int n = scan.nextInt();

            for(int i = 1; i <= n; i++) {
                for(int j = n; j >= i; j--) {
                    System.out.print(" ");
                }
                for(int j = 1; j <= i; j++) {
                    System.out.print("* ");
                }
                System.out.println();
            }
            
            for(int i = 1; i <= n + 1; i++) {
                System.out.print("* ");
            }
            System.out.println();
            
            for(int i = 1; i <= n; i++) {
                for(int j = 1; j <= i; j++) {
                    System.out.print(" ");
                }
                for(int j = n; j >= i; j--) {
                    System.out.print("* ");
                }
                System.out.println();
            }
        }
    }
}