Java解答

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner n = new Scanner(System.in);
		int a = n.nextInt();
		int i = 1, k = 0, y = 1;
		while (i <= a) {
			k = (a - i) * 4;
			while (k > 0) {
				System.out.print(" ");
				k--;
			}
			int z = 1;
			while (z <= y) {
				System.out.printf("%4d", z);
				z = z * 2;
			}
			z = z / 4;
			while (z >= 1) {
				System.out.printf("%4d", z);
				z = z / 2;
			}
			i++;
			y = y * 2;
			System.out.print("\n");
		}
	}
}