题解 | #蛇形矩阵#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while (scan.hasNext()) {
            int n = scan.nextInt();
            int[][] arr = new int[n][n];
            arr[0][0] = 1;
            for (int i = 0; i < n; i++) {
                StringBuffer sb = new StringBuffer();
                if (i > 0) {
                    arr[i][0] = arr[i - 1][0] + i;
                }
                sb.append(arr[i][0]).append(" ");
                for (int j = 1; j < n - i; j++) {
                    arr[i][j] = arr[i][j - 1] + i + j + 1;
                    sb.append(arr[i][j]).append(" ");
                }
                System.out.println(sb);
            }
        }
    }
}