题解 | #蛇形矩阵#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int size = in.nextInt();
        int lineBeginNumber = 1;
        for (int i = 0; i < size; i++) {
            lineBeginNumber += i;
            int columnBeginNumber = lineBeginNumber;
            for (int j = 0; j < size - i; j++) {
                columnBeginNumber += (j == 0 ? 0 : (j + 1) + i);
                System.out.printf("%d ", columnBeginNumber);
            }
            System.out.println();
        }
    }
}