Leetcode-892 Surface Area of 3D Shapes(三维形体的表面积)

class Solution
{
public:
    int surfaceArea(vector<vector<int>> &grid)
    {
        int result = 0;
        for(auto v:grid)
            for(auto d:v)
            {
                if(d==1)
                    result += 6;
                else if(d==0)
                    continue;
                else
                    result += 6+4*(d-1);
                    
            }
    //    cout << result << endl;
        for(int i = 0;i < grid.size();i ++)
        {
            for(int j = 0;j < grid[i].size();j ++)
            {
                if(i==grid.size()-1)
                {
                    if(j==grid[i].size()-1)
                    {
                        continue;
                    }
                    else
                    {
                        if(grid[i][j]<grid[i][j+1])
                            result -= grid[i][j]*2;
                        else
                            result -= grid[i][j+1]*2;
                    }
                }
                else
                {
                    if(j==grid[i].size()-1)
                    {
                        if(grid[i][j]<grid[i+1][j])
                            result -= grid[i][j]*2;
                        else
                            result -= grid[i+1][j]*2;
                    }
                    else
                    {
                        if(grid[i][j]<grid[i][j+1])
                            result -= grid[i][j]*2;
                        else
                            result -= grid[i][j+1]*2;
                        if(grid[i][j]<grid[i+1][j])
                            result -= grid[i][j]*2;
                        else
                            result -= grid[i+1][j]*2;
                    }
                }
            }
        }
        return result;
    }
};