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 scanner = new Scanner(System.in);
        int numLine = scanner.nextInt();
        for (int i = 0; i < numLine; i++) {
            int begin = 1+i*(i+1)/2;
            System.out.print(begin + " ");
            for (int j = 0; j < numLine-i-1; j++) {
                System.out.print((begin+=(j+i+2)) + " ");
            }
            System.out.print("\n");
        }
    }
}