Poj Solution 1656

http://poj.org/problem?id=1656

import java.util.Scanner;


public class Main {
 public static void main(String[] args)
 {
  Scanner in = new Scanner(System.in);
  int num = in.nextInt();
  int[][] grids = new int[101][101];
  for(int i = 0; i< num; i++)
   {
    String color = in.next();
    int x = in.nextInt();
    int y = in.nextInt();
    int l = in.nextInt();
    if(color.equals("BLACK"))
    {
        for(int j = x; j< x+l; j++)
        {
        for(int k = y; k< y+l; k++)
        {
            grids[j][k] = 1;
        }
    }
    }
    if(color.equals("WHITE"))
    {
        for(int j = x; j< x+l; j++)
        {
          for(int k = y; k< y+l; k++)
          {
            grids[j][k] = 0;
          }
        }
    }
    if(color.equals("TEST"))
    {
        int count = 0;
        for(int j = x; j< x+l; j++)
        {
            for(int k = y; k< y+l; k++)
            {
                if(grids[j][k] == 1)
                    count++;
            }
        }
        System.out.println(count);
    }
   }
  }
}