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SetMatrixZeroes.java
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SetMatrixZeroes.java
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package leetcode;
public class SetMatrixZeroes {
public void setZeroes(int[][] matrix) {
int m = matrix.length;
int n = matrix[0].length;
boolean firstc = false;
boolean firstr = false;
for(int i = 0; i < m ;i++){
if(matrix[i][0] == 0){
firstc = true;
break;
}
}
for(int j = 0; j < n ;j++){
if(matrix[0][j] == 0){
firstr = true;
break;
}
}
for(int i = 1;i<m;i++)
for(int j = 1;j<n;j++){
if(matrix[i][j] == 0){
matrix[i][0] = 0;
matrix[0][j] = 0;
}
}
for(int i = 1; i < m ;i++){
if(matrix[i][0] == 0)
for(int j = 1;j<n;j++) matrix[i][j] = 0;
}
for(int j = 1; j < n ;j++){
if(matrix[0][j] == 0)
for(int i = 1;i<m;i++) matrix[i][j] = 0;
}
if(firstc)
for(int i = 0;i<m;i++) matrix[i][0] = 0;
if(firstr)
for(int j = 0;j<n;j++) matrix[0][j] = 0;
}
}