Someone

void GetBuildingCount(int marineCount,int int[,] marinePositions)    
{      
int i,x,y,rows=0,columns=0;

static int [] markx =new int[9];
                static int [] marky =new int[9]; 

               
  for(i = 0; i < marineCount;i++)
                {
                    x = marinePositions[i,0];
                    markx[x]++;
                   
                    y = marinePositions[i,1];
                    marky[y]++;
                }             
               
 
                       
               
                for(i=0;i<8;i++)
                {
                        if(marky[i]!=0)
                        columns++;
                        if(markx[i]!=0)
                        rows++;
                        }
                       
                        output1=(columns*8)+(8-columns)*rows  ;
}