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();
        StringBuilder[] sr = new StringBuilder[n];
        int jl = 0, mb = ((n + 1) * n) / 2;
        int tmp = 1;
        // 初始化StringBuilder数组的每个元素
        for (int k = 0; k < n; k++) {
            sr[k] = new StringBuilder();
        }
        for (int i = 0; i < n; i++) {
            for (int j = i; j >= 0; j--) {
                sr[(j % n)].append(tmp++);
                sr[(j % n)].append(" ");
            }
        }


        for (int j = 0; j < n; j++) {
            System.out.println(sr[j]);
        }

    }
}