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  1. PO
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    <p><strong>Updated</strong> to return the indexes. Also, I imagine it's undesirable to change the original matrix in the course of this, so I wrote a test that confirmed my original implementation <em>did</em> change the matrix, then modified the code so it doesn't, anymore.</p> <pre><code>package playground.tests; import java.util.Arrays; import junit.framework.TestCase; public class BiggerTest extends TestCase { public void testBigger() throws Exception { int mat[][] = { { 3, 1, 2 }, { 4, 5, 6 }, { 7, 8, 9 } }; int[] result = bigger(0, 2, mat); assertEqualArrays(new int[] { 2, 3 }, result); } public void testBiggerDoesntChangeOriginalMatrix() throws Exception { int mat[][] = { { 3, 1, 2 }, { 4, 5, 6 }, { 7, 8, 9 } }; bigger(0, 2, mat); assertEqualArrays(new int[] { 3, 1, 2 }, mat[0]); } public void testBiggerIndex() throws Exception { int mat[][] = { { 3, 1, 2 }, { 4, 5, 6 }, { 7, 8, 9 } }; int[] result = biggerIndexes(0, 2, mat); assertEqualArrays(new int[] { 2, 0 }, result); } private int[] biggerIndexes(int rowIndex, int count, int[][] matrix) { int[] biggerValues = bigger(rowIndex, count, matrix); int[] row = matrix[rowIndex]; int[] result = new int[count]; for (int i = 0; i &lt; result.length; i++) result[i] = findIndex(biggerValues[i], row); return result; } private int findIndex(int value, int[] values) { for (int i = 0; i &lt; values.length; i++) if (values[i] == value) return i; return -1; } private int[] bigger(int rowIndex, int count, int[][] matrix) { int[] row = copy(matrix[rowIndex]); Arrays.sort(row); int[] result = new int[count]; for (int i = 0; i &lt; count; i++) result[i] = row[i + row.length - count]; return result; } private static int[] copy(int[] original) { int[] result = new int[original.length]; for (int i = 0; i &lt; result.length; i++) result[i] = original[i]; return result; } private static void assertEqualArrays(int[] a, int[] b) { assertEquals(a.length, b.length); for (int i = 0; i &lt; a.length; i++) assertEquals(a[i], b[i]); } } </code></pre>
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    1. POThe bigger value in a matrix row
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    1. USCarl Manaster
    1. USCarl Manaster
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    1. POThe bigger value in a matrix row
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    1. COHey @carl I guess he is looking for indexes of bigger values.
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    2. COHi @Carl. Your solution doesn't consider the indexes of the bigger values, isn't it? How can I obtain just the index of the bigger values?
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      1. USmarionmaiden
    3. CO@marionmaiden, I've updated the code to return the indexes; see above. Also, my original implementation was messing with the matrix and I imagine you don't want that.
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