algorithms_and_data_structures | various algorithms data-structures | Learning library

If you open the computer science category in wikipedia (https://en.wikipedia.org/wiki/Category:Computer_science), it displays a total of 19 subcategories (https://en.wikipedia.org/wiki/Category:Computer_science). Now, for all these 19 subcategories, if I want to extract only the page names (the titles of pages). For example Pages in category Computer science has 45 pages which is displayed as bullets just below the wikipedia subcategories list. Now for all the other associated subcategories, for example the Areas of computer science is a subcategory with 3 pages (https://en.wikipedia.org/wiki/Category:Areas_of_computer_science). But, again it has 17 sub-categories (i.e. depth 1, considering the traversal, i.e. depth = 1 means, we are 1 deep). Again, algorithm and data structures (https://en.wikipedia.org/wiki/Category:Algorithms_and_data_structures) having 5 pages, and artificial intelligence (https://en.wikipedia.org/wiki/Category:Artificial_intelligence) having 333 pages with some additional categories and subcategories spanned in multiple pages (see Pages in category "Artificial intelligence") with 37 categories and 333 pages, like this the list goes on more deeper. We are now in depth 2. What I need is to extract all the pages (titles) for the traversal with depth 1 and depth 2. Does there exist any algorithm to achieve the same?

For Example: the subcategory area of computer science is again having some (17) subcategories with a total number of pages 5+333+127+79+216+315+37+47+95+37+246+103+21+2+55+113+94 pages considering all the (17) subcategories. This is depth 2 because, I toggled twice the list. Similarly, same thing needs to be incorporated for the rest 18 subcategories (https://en.wikipedia.org/wiki/Category:Computer_science) with a depth of 2 for the base root Computer science?

Does there exist any way to achieve this? Displaying and extracting that many number of pages is difficult because it will be huge. Thus, maximum threshold of 10,000 pages would be absolutely okay.

Does there exist any way to do this? Any small help is deeply appreciated!