
    Given a collection of delivery routes where each route contains a sequence of delivery stop IDs, find the route that requires the most number of stops. This route will help identify the most demanding delivery path that requires the most attention for resource allocation and optimization.
    

    
def max_length(list1):
    """
    Given a collection of delivery routes where each route contains a sequence of delivery stop IDs, find the route that requires the most number of stops. This route will help identify the most demanding delivery path that requires the most attention for resource allocation and optimization.
    

    """
def max_length(list1):
    """
    Given a collection of delivery routes where each route contains a sequence of delivery stop IDs, find the route that requires the most number of stops. This route will help identify the most demanding delivery path that requires the most attention for resource allocation and optimization.
    

    """
    max_length = max((len(x) for x in list1))
    max_list = max((x for x in list1))
    return (max_length, max_list)