Diamond.java

import java.util.Scanner;

public class Diamond {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < (n - i - 1); j++)
                System.out.print(" ");
            for (int k = 0; k < (2 * i + 1); k++)
                System.out.print("*");
            System.out.println();
        }
        int m = n - 2;
        for (int i = 1; i < n; i++) {
            for (int j = 1; j <= i; j++)
                System.out.print(" ");
            for (int k = 1; k <= 2 * m + 1; k++)
                System.out.print("*");
            m = m - 1;
            System.out.println();
        }
    }
}