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  1. /* package whatever; // don't place package name! */
  2.  
  3. class MakeRowColumnAsOne {
  4.  
  5. 	/**
  6. 	 * @param args
  7. 	 */
  8. 	public static void main(String[] args) {
  9. 		    int [][] mat = new int[][] { {1, 0, 0, 1},{0, 0, 1, 0},{0, 0, 0, 0}};
  10.  
  11. 		    System.out.println("Input Matrix \n");
  12. 		    printMatrix(mat);
  13.  
  14. 		    modifyMatrix(mat);
  15.  
  16. 		    System.out.println("Matrix after modification \n");
  17. 		    printMatrix(mat);
  18.  
  19.  
  20. 	}
  21.  
  22. 	public static void printMatrix(int[][] mat)
  23. 	{
  24. 	    int i, j;
  25. 	    for (i = 0; i < mat.length; i++)
  26. 	    {
  27. 	        for (j = 0; j < mat[i].length; j++)
  28. 	        {
  29. 	            System.out.print(mat[i][j]);
  30. 	        }
  31. 	        System.out.println("\n");
  32. 	    }
  33. 	}
  34.  
  35.  
  36. 	public static void modifyMatrix(int[][] mat)	{
  37. 	    int i, j;
  38. 	    boolean paintRow1=false, paintCol1=false;
  39. 	    i = 0;j=0;
  40. 	    while(j<mat[0].length && !paintRow1){
  41. 	    	if(mat[0][j]==1){
  42. 	    		paintRow1=true;
  43. 	    	}
  44. 	    	j++;
  45. 	    }
  46. 	    i = 0;j=0;
  47. 	    while(i<mat.length && !paintCol1){
  48. 	    	if(mat[i][0]==1){
  49. 	    		paintCol1=true;
  50. 	    	}
  51. 	    	i++;
  52. 	    }
  53.  
  54. 	    for (i = 1; i < mat.length; i++)
  55. 	    	for (j = 1; j < mat[i].length; j++)
  56. 	        {
  57. 	            if(mat[i][j]==1){
  58. 	            	mat[i][0]=1;
  59. 	            	mat[0][j]=1;
  60. 	            }
  61. 	        }
  62. 	    for (i = 1; i < mat.length; i++)
  63. 	    	for (j = 1; j < mat[i].length; j++)
  64. 	        {
  65. 	            if(mat[0][j]==1 || mat[i][0]==1){
  66. 	            	mat[i][j]=1;
  67. 	            }
  68. 	        }
  69. 	    if(paintCol1 ){
  70. 	    	for(i=0;i<mat.length;i++) mat[i][0]=1;
  71. 	    }
  72. 	    if(paintRow1){
  73. 	    	for(j=0;j<mat[0].length;j++) mat[0][j]=1;
  74. 	    }
  75. 	}
  76. }
  77.  
Success #stdin #stdout 0.07s 380160KB
comments (?)
stdin
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Standard input is empty
stdout
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Input Matrix 

1001

0010

0000

Matrix after modification 

1111

1111

1011
https://ideone.com/v2Bec8
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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