Modify Boolean Matrix

//Methodd 1:TC = O(N*M) and space complexity O(N+M)
//LOGIC:we sill store all the rows in map which have 1 atleast one and same for col.
//after that traverse the matrix,make the (i,j) box=1 if i is in row map,or j is in col map.
  void booleanMatrix(vector<vector<int> > &matrix)
     {
         unordered_map<int,int> row,col;
         for(int i=0;i<matrix.size();i++){
             for(int j=0;j<matrix[i].size();j++){
                 if(matrix[i][j]==1){row[i]=1;col[j]=1;}
             }
         }
         for(int i=0;i<matrix.size();i++){
             for(int j=0;j<matrix[i].size();j++){
                 if(matrix[i][j]==0 && (row[i] || col[j])) matrix[i][j]=1;
             }
         }
     }

//Method 2:
//TC O(N*M) space O(1)
//we did same as the method 1 ,we wanted to store the row and col having one at some place,so we will store at
//oth row and oth col and one more thing to find,if 0th row and oth col will be all 1 or not that we did using
//row and col variable and after that traverse the full array and made those (i,j) box 1 whose i is present in
//0th row and whose j is present in 0th col.
//and finally if first row should be 1 then put 1 and same for col.
class Solution
{
    public:
    //Function to modify the matrix such that if a matrix cell matrix[i][j]
    //is 1 then all the cells in its ith row and jth column will become 1.
    void booleanMatrix(vector<vector<int> > &matrix){
        int row=false,col=false;
        for(int i=0;i<matrix.size();i++){
            for(int j=0;j<matrix[i].size();j++){
                if(matrix[i][j]==1 && i==0) row=true;  //if i==0,means 1st full row should be 1
                if(matrix[i][j]==1 && j==0) col=true;  //if j==1,means 1st full col should be 1
                if(matrix[i][j]==1){
                    matrix[0][j]=1;                     //marked the column which should be 1
                    matrix[i][0]=1;                     //marked the row which should be 1
                }
            }
        }

        for(int i=1;i<matrix.size();i++){
            for(int j=1;j<matrix[i].size();j++){
                if(matrix[i][j]==0 && (matrix[0][j]==1 || matrix[i][0]==1) ) matrix[i][j]=1;
            }
        }

        for(int i=0;i<matrix.size();i++){
            for(int j=0;j<matrix[i].size();j++){
                if(row){
                    matrix[0][j]=1;
                }
                if(col){
                    matrix[i][0]=1;
                }
            }
        }

    }
};