11. 숫자사각형2

package _11;

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int num = sc.nextInt();
		
		for (int i = 0; i < num; i++) {
			for (int j = 0; j < num; j++) {
				System.out.printf("%3d", j*num + i + 1);
			}
			System.out.println();
		}				
	}
}

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5
  1  6 11 16 21
  2  7 12 17 22
  3  8 13 18 23
  4  9 14 19 24
  5 10 15 20 25