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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. 		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  13.  
  14. 		String str = br.readLine();
  15.  
  16. 		int n = str.length();
  17.  
  18. 		char[][] matrix = new char[n][2*n+1];
  19.  
  20. 		char[] chrArr = str.toCharArray();
  21.  
  22. 		// initializes the matrix with blank spaces
  23. 		for (int i = 0; i < n; i++) {
  24. 			for (int j = 0; j < 2*n+1; j++) {
  25. 				matrix[i][j] = ' ';
  26. 			}
  27. 		}
  28.  
  29. 		// build the two sides of the triangle
  30. 		for (int i = 0; i < n - 1; i++) {
  31. 			matrix[i][n-i] = chrArr[i];
  32. 			matrix[i][n+i] = chrArr[i];
  33. 		}
  34.  
  35. 		// last line, build the base of the triangle
  36. 		for (int i = 0; i < n; i++) {
  37. 			matrix[n-1][n-i] = chrArr[i];
  38. 			matrix[n-1][n+i] = chrArr[i];
  39. 		}
  40.  
  41. 		// print
  42. 		for (int i = 0; i < n; i++) {
  43. 			for (int j = 0; j < 2*n+1; j++) {
  44. 				System.out.print(matrix[i][j]);
  45. 			}
  46. 			System.out.print("\n");
  47. 		}
  48. 	}
  49. }
Success #stdin #stdout 0.11s 320512KB
comments (?)
stdin
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STACKOVERFLOW
stdout
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             S             
            T T            
           A   A           
          C     C          
         K       K         
        O         O        
       V           V       
      E             E      
     R               R     
    F                 F    
   L                   L   
  O                     O  
 WOLFREVOKCATSTACKOVERFLOW
https://ideone.com/NlMHjf
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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