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SetMatrixZeroes.java
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SetMatrixZeroes.java
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package arrays;
public class SetMatrixZeroes {
public void setZeroes(int[][] matrix) {
boolean isFirstRowZero = false, isFirstColZero = false;
int m = matrix.length;
int n= matrix[0].length;
for (int i = 0; i < m; i ++) {
for (int j = 0; j < n; j ++) {
if (matrix[i][j] == 0) {
if (i == 0) {
isFirstRowZero = true;
}
matrix[i][0] = 0;
if (j == 0) {
isFirstColZero= true;
}
matrix[0][j] = 0;
}
}
}
for (int i = 1; i < m; i ++) {
for (int j = 1; j < n; j ++) {
if (matrix[i][0] == 0 || matrix[0][j] == 0)
matrix[i][j] = 0;
}
}
if (isFirstRowZero)
for (int j = 0; j < n; j ++)
matrix[0][j] = 0;
if (isFirstColZero)
for (int i = 0; i < m; i ++)
matrix[i][0] = 0;
}
}