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 num = in.nextInt();

        for(int i = 0; i<num; i++){
            int init = 1+i*(i+1)/2;
            System.out.print(init);
            for (int j = 1; j<num-i;j++){
                System.out.print(" ");
                System.out.print(init+ (2*i+j+3)*j/2);
                
            }
            System.out.println();
        }
    }
}