Method setZeroes1

73. Set Matrix Zeroes/Solution.cpp:11–29

straight forward version

public:
    // straight forward version
    void setZeroes1(vector<vector<int>>& matrix) {
        int m = matrix.size();
        if (m == 0) return;
        int n = matrix[0].size();
        vector<vector<int>> mx = matrix;
        for (int i=0; i<m; i++) {
            for (int j=0; j<n; j++) {
                if (mx[i][j] == 0) {
                    for (int i=0; i<m; i++) {
                        matrix[i][j] = 0;
                    }
                    for (int j=0; j<n; j++) {
                        matrix[i][j] = 0;
                    }
                }
            }
        }
        
    }

    // straight forward version
    void setZeroes2(vector<vector<int>>& matrix) {