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 n = in.nextInt();
        int d = 1, c1 = 0;
        for (int i = 0; i < n; i++) {
            d += c1++;
            int c2 = i + 2, b = d;
            for (int j = i; j < n; j++) {
                System.out.print(b + " ");
                b += c2++;
            }
            System.out.println();
        }
    }
}