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0073.cpp
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class Solution {
public:
void setZeroes(vector<vector<int>>& matrix) {
bool row = false, col = false;
for(int i = 0; i < matrix.size(); i++){
for(int j = 0; j < matrix[0].size(); j++){
if(matrix[i][j] == 0) {
if(i == 0) row = true;
if(j == 0) col = true;
matrix[0][j] = matrix[i][0] = 0;
}
}
}
for(int i = 1; i < matrix.size(); i++){
for(int j = 1; j < matrix[0].size(); j++){
if(matrix[i][0] == 0 || matrix[0][j] == 0) matrix[i][j] = 0;
}
}
if(col){
for(int i = 0; i < matrix.size(); i++) matrix[i][0] = 0;
}
if(row){
for(int j = 0; j < matrix[0].size(); j++) matrix[0][j] = 0;
}
}
};