vector<vector<Node*>> Matrix::graphRepresentation()
{
	vector<vector<Node*>> graph;
	int k = 0;
	for (int i = 0; i < this->rows; i++)
	{
		for (int j = 0; j < this->cols; j++)
		{
			if (matrix[i][j] == '.')
			{
				graph.at(k).push_back(new Node(i, j, NULL));
			}
		}
	}

	return graph;
}