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80 lines
1.5 KiB
80 lines
1.5 KiB
package class29;
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public class Problem_0073_SetMatrixZeroes {
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public static void setZeroes1(int[][] matrix) {
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boolean row0Zero = false;
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boolean col0Zero = false;
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int i = 0;
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int j = 0;
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for (i = 0; i < matrix[0].length; i++) {
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if (matrix[0][i] == 0) {
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row0Zero = true;
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break;
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}
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}
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for (i = 0; i < matrix.length; i++) {
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if (matrix[i][0] == 0) {
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col0Zero = true;
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break;
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}
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}
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for (i = 1; i < matrix.length; i++) {
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for (j = 1; j < matrix[0].length; j++) {
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if (matrix[i][j] == 0) {
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matrix[i][0] = 0;
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matrix[0][j] = 0;
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}
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}
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}
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for (i = 1; i < matrix.length; i++) {
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for (j = 1; j < matrix[0].length; j++) {
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if (matrix[i][0] == 0 || matrix[0][j] == 0) {
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matrix[i][j] = 0;
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}
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}
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}
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if (row0Zero) {
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for (i = 0; i < matrix[0].length; i++) {
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matrix[0][i] = 0;
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}
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}
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if (col0Zero) {
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for (i = 0; i < matrix.length; i++) {
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matrix[i][0] = 0;
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}
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}
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}
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public static void setZeroes2(int[][] matrix) {
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boolean col0 = false;
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int i = 0;
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int j = 0;
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for (i = 0; i < matrix.length; i++) {
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for (j = 0; j < matrix[0].length; j++) {
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if (matrix[i][j] == 0) {
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matrix[i][0] = 0;
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if (j == 0) {
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col0 = true;
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} else {
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matrix[0][j] = 0;
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}
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}
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}
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}
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for (i = matrix.length - 1; i >= 0; i--) {
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for (j = 1; j < matrix[0].length; j++) {
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if (matrix[i][0] == 0 || matrix[0][j] == 0) {
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matrix[i][j] = 0;
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}
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}
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}
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if (col0) {
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for (i = 0; i < matrix.length; i++) {
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matrix[i][0] = 0;
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}
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}
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}
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}
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