题解 | #蛇形矩阵#

import java.util.Scanner;

import java.util.*;

public class Main {
    public static void main(String[] args) {
         Scanner in = new Scanner(System.in);
        int num = in.nextInt();

        int firstNum = 1;

        for(int i = 1; i<=num; i++){

            int output = firstNum;
            int plus = i+1;
            for(int j = num-i; j >= 0; j--){
                System.out.print(output +" ");
                output+= plus;
                plus++;
            }
            firstNum+= i;
            System.out.println();

        }

    }



}