My apologies. I misunderstood the question from the image. Thank you for clarifying. Here are five main types of infrastructure provided by the National Port Authority in Cameroon for managing the port: 1. Docks and Berths: These are the physical structures where ships moor to load and unload cargo and passengers. The port authority ensures these are maintained and sufficient in number and size to accommodate various types of vessels. 2. Warehouses and Storage Facilities: These include sheds, open storage areas, and specialized facilities (like cold storage or grain silos) for temporarily holding cargo before it is transported inland or loaded onto ships. 3. Cranes and Material Handling Equipment: The port provides various types of cranes (e.g., gantry cranes, mobile harbor cranes) and other equipment like forklifts and conveyors to efficiently move cargo between ships, storage areas, and land transport. 4. Access Roads and Rail Links: Essential for connecting the port to the national transportation network, allowing for the smooth flow of goods to and from the hinterland. This infrastructure ensures efficient multimodal transport. 5. Navigation Aids and Channels: This includes lighthouses, buoys, and Vessel Traffic Service (VTS) systems to guide ships safely into and out of the port. The port authority also manages the dredging of channels to maintain adequate depth for large vessels.

This computer science problem involves algorithmic thinking and programming concepts. The solution below explains the approach, logic, and implementation step by step.