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);
        while (in.hasNextLine()) {
          int n = Integer.parseInt(in.nextLine());
            int[][]iArr = new int[n][];
            for (int i = 0; i < n; i++) {
                iArr[i]  = new int[n-i];
                for (int j = 0; j < n -i; j++) {
                    int res = (j+1+i)*(j+2+i)/2 - i;
                    iArr[i][j]= res;
                    System.out.print(iArr[i][j]);
                    if(j!=n - i - 1){
                        System.out.print(" ");
                    }
                }
                if(i!=n - 1){
                    System.out.println("");
                }
            }
        }
    }
}