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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		Scanner sc = new Scanner(System.in);
  14.         int t = sc.nextInt(), curr = 1;
  15.         while(t-->0){
  16.             int n = sc.nextInt();
  17.             char [][] res = new char [n][n];
  18.             int top = 0 , left = 0,bottom = n-1,right = n-1;
  19.             System.out.println("Case #"+curr+":");
  20.             while(left<= right && top <= bottom){
  21.                 for(int i=left; i<= right;i++)
  22.                     res[top][i] = '*';
  23.                 top++;
  24.                 if(left != 0)
  25.                     left++;
  26.                 for(int i=top; i<= bottom;i++)
  27.                     res[i][right] = '*';
  28.                 right--;
  29.                 if(top < bottom){
  30.                     for(int i=right; i>= left;i--)
  31.                         res[bottom][i] = '*';
  32.                     bottom--;
  33.                 }
  34.                 top++;
  35.                 if(left <= right){
  36.                     for(int i= bottom; i >= top;i--)
  37.                         res[i][left] = '*';
  38.                     left++;
  39.                 }
  40.                 right--;
  41.                 bottom--;
  42.             }
  43.             for(int i=0;i<n;i++){
  44.                 for(int j=0;j<n;j++){
  45.                     System.out.print((res[i][j]=='*')?'*'+" ":"  ");
  46.                 }
  47.                 System.out.println();
  48.             }
  49.             curr++;
  50.         }
  51. 	}
  52. }
Success #stdin #stdout 0.18s 60852KB
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stdout
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Case #1:
* * * * * 
        * 
* * *   * 
*       * 
* * * * * 
Case #2:
* * * * * * * * * * 
                  * 
* * * * * * * *   * 
*             *   * 
*   * * * *   *   * 
*   *     *   *   * 
*   *         *   * 
*   * * * * * *   * 
*                 * 
* * * * * * * * * *
https://ideone.com/B5b9JL
language:
Java (HotSpot 12)
created:
3 days ago
visibility:
public

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