Ivan 1c

ex = '''
1.c) Let's pretend we have a new list representing an extended version of the l_schedule, 
such that it embeds information about the date, time and the duration (in hours) of the each lesson. 
We call the new list l_schedule_extended. Each element is represented 
as a tuple: 
([HOURS],[DATE],[TIME],[TITLE]). 
For instance, the third lesson "Algorithms" will have the corresponding 
tuple: (2,"15/10/21","12:30-14:30","Algorithms"). Here we have the entire l_schedule_extended:'''

l_schedule_extended = [(2,"11/10/21","09:30-11:30","Introduction to the course"),
                       (2,"13/10/21","09:30-11:30","Introduction to Computational Thinking"),
                       (2,"15/10/21","12:30-14:30","Algorithms"),
                       (2,"18/10/21","09:30-11:30","Laboratory"),
                       (2,"20/10/21","09:30-11:30","Computability"),
                       (2,"22/10/21","12:30-14:30","Programming languages"),
                       (2,"25/10/21","09:30-11:30","Organising information: ordered structures"),
                       (2,"27/10/21","09:30-11:30","Laboratory"),
                       (2,"29/10/21","12:30-14:30","Brute-force algorithms"),
                       (2,"08/11/21","09:30-11:30","Laboratory"),
                       (2,"10/11/21","09:30-11:30","Organising information: unordered structures"),
                       (2,"15/11/21","09:30-11:30","Laboratory"),
                       (2,"17/11/21","09:30-11:30","Recursion"),
                       (2,"22/11/21","09:30-11:30","Laboratory"),
                       (2,"24/11/21","09:30-11:30","Divide and conquer algorithms"),
                       (2,"29/11/21","09:30-11:30","Laboratory"),
                       (2,"01/12/21","09:30-11:30","Dynamic programming algorithms"),
                       (2,"06/12/21","09:30-11:30","Organising information: trees"),
                       (2,"13/12/21","09:30-11:30","Backtracking algorithms"),
                       (2,"15/12/21","09:30-11:30","Organising information: graphs"),
                       (2,"20/12/21","09:30-11:30","Greedy algorithms")]

'''
Define a function max_lessons_hours() which takes l_schedule_extended and a number max_hours as parameters, 
and returns a list containing only the titles of all the lessons which could be attended with a maximum number 
of hours = max_hours, starting from the first lesson of the year.'''