[Hdu5538] [5acm/ICPC Changchun station in Asia] House Building Question & code

[Hdu5538] [5acm/ICPC Changchun station in Asia] House Building Question & code

Question:
In the top view of the building block chart, input data indicates that (I, j) is placed with a building block with the height of h [I] [j, calculate the surface area (not the lower surface !!!).
Question:
A question, such as me, can quickly think of a question... See the code implementation for details.
Code:

#include
  
   #include#include
   
    #include
    
     using namespace std;int T,n,m,h[55][55];int main(){    scanf("%d",&T);    while(T--)    {        scanf("%d%d",&n,&m);        memset(h,0,sizeof(h));        for (int i=1;i<=n;i++)        for (int j=1;j<=m;j++)        scanf("%d",&h[i][j]);        int ans=0;        for (int i=1;i<=n;i++)        for (int j=1;j<=m;j++)        {            if (h[i][j]!=0) ans++;            if (h[i][j]>h[i-1][j]) ans+=h[i][j]-h[i-1][j];            if (h[i][j]>h[i+1][j]) ans+=h[i][j]-h[i+1][j];            if (h[i][j]>h[i][j-1]) ans+=h[i][j]-h[i][j-1];            if (h[i][j]>h[i][j+1]) ans+=h[i][j]-h[i][j+1];            //cout<