leetcode——73——Set Matrix Zeroes

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.

class Solution {
public:
    void setZeroes(vector<vector<int>>& matrix) {
        

        int row = matrix.size();  
        if(row == 0) return;  
        int col = matrix[0].size();  
        if(col == 0) return;  
          
        bool* record = new bool[row+col];  
        memset(record,false,row+col);  
        for(int i = 0; i < row; ++i)  
            for(int j = 0; j < col; ++j){  
                if(matrix[i][j] == 0) {  
                    record[i] = 1;  
                    record[row+j] = 1;  
                }  
            }  
              
        for(int i = 0; i < row; ++i)  
            if(record[i]){  
                for(int j = 0; j < col; ++j)  
                    matrix[i][j] = 0;  
            }  
        for(int j = row; j < row+col; ++j)  
            if(record[j]){  
                for(int i = 0; i < row; ++i)  
                    matrix[i][j-row] = 0;  
            }  
    
    }
};