int[][] LerArquivo(String nome) throws Exception
	{
		String line, tokens[];
		BufferedReader file = null;
		int k = 0, i;

		file = new BufferedReader(new FileReader(nome));

		line = file.readLine();
		tokens = line.split(",");
		l = Integer.parseInt(tokens[0]);
		c = Integer.parseInt(tokens[1]);

		mundo = new int[l][c];

		i = 0;
		while(file.ready())
		{
			line = file.readLine();
			tokens = line.split(",");
			k = 0;
			for(int j = 0; j < c; j++)
			{
				mundo[i][j] = Integer.parseInt(new String(tokens[k++]));
			}
			i++;
		}
		return mundo;
	}