View Code of Problem 57

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		for(int i = 1;i <= n;i++) {
			for(int j = 1;j <= n - i;j++) {
				System.out.print(" ");
			}
			for(int k = 1;k <= i;k++) {
				System.out.print(k);
			}
			for(int k = i - 1;k >= 1;k--) {
				System.out.print(k);
			}
			System.out.println();
		}
		for(int i = n - 1;i >= 1;i-- ) {
			for(int j = 1;j <= n - i;j++) {
				System.out.print(" ");
			}
			for(int k = 1;k <= i;k++) {
				System.out.print(k);
			}
			for(int k = i - 1;k >= 1;k--) {
				System.out.print(k);
			}
			System.out.println();
		}
	}
}