倒蛇陣

輸入 

包括一系列的測試用例，每個包含一個整數n，0<=n<=9，n=0時退出程式

輸出

對應的倒蛇陣

樣例輸入

2

3

0

樣例輸出

4 1

3 2

7 8 1

6 9 2

5 4 3

import java.util.Scanner;
public class H {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
        int num;
		while((num=Integer.parseInt(in.nextLine()))!=0)
		{    
			int[][] arr = new int[100][100];
			int i=0, j=num-1, max=num*num,ans=1;
			arr[i][j]=1;
			while(ans < max)
			{
			        while(i+1 < num&& arr[i+1][j] == 0)
			            arr[i++][j] = ans++;
			        while(j-1 >= 0 && arr[i][j-1] == 0)
			            arr[i][j--] = ans++;
			        while(i-1 >= 0 && arr[i-1][j] == 0)
			            arr[i--][j] = ans++;
			        while(j+1 < num && arr[i][j+1] == 0)
			            arr[i][j++] = ans++;
			 }
			for(i=0;i<num;i++)
		    {
		        for(j=0;j<num;j++)
		        {
		            if(arr[i][j]==0)
		                System.out.print(num*num+" ");
		            else
		            {
		            	if(j!=num-1)
		            	   System.out.print(arr[i][j]+" ");
		            	else
		            		 System.out.print(arr[i][j]);
		            }
		        }
		        System.out.println();
		    }
		}
	}
}