题解 | #蛇形矩阵#

找规律：

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 circle = n;
        int k = 0;
        while (circle > 0) {
            int c = n - circle + 1;
            for (int i = n - circle + 1; i <= n; i++) {
                int cur = (1 + i) * c / 2;
                c++;
                System.out.print(cur - k);
                System.out.print(" ");
            }
            System.out.println();
            k++;
            circle--;
        }
    }
}