周赛162：奇数值单元格的数目

class Solution
{
public:
    vector<vector<int>> reconstructMatrix(int upper, int lower, vector<int> &v)
    {
        vector<vector<int>> matrix;
        matrix.push_back(vector<int>());
        matrix.push_back(vector<int>());
        for (int i = 0; i < v.size(); i++)
        {
            if (v[i] == 2)
            {
                matrix[0].push_back(1);
                matrix[1].push_back(1);
                upper--;
                lower--;
            }
            else if (v[i] == 0)
            {
                matrix[0].push_back(0);
                matrix[1].push_back(0);
            }
            else
            {
                if (upper > lower)
                {
                    matrix[0].push_back(1);
                    matrix[1].push_back(0);
                    upper--;
                }
                else
                {
                    matrix[1].push_back(1);
                    matrix[0].push_back(0);
                    lower--;
                }
            }
        }
        if (upper == 0 && lower == 0)
        {
            return matrix;
        }
        matrix.clear();
        return matrix;
    }
};