I am a little embarrassed to say this but I have come back to this challenge every day for a week and still can’t remember the solution the next day. I think my problem is that I don’t understand why in:
sum = lst[int(len(lst)/2)] + lst[int(len(lst)/2) -1]
this line of code, the int() is not only for the len(lst). Why do I also have to include the “/2” in the int… and even further, why NOT include the “-1”? Maybe if I understood the reason, I would be able to rationalize it and remember.