TypeError, I know why but not how!?

[ssecorp]

ty I came to the same conckusion in bed :)

now it works.


however since there are 400 students and some are incompatible I
shouldnt be able to generate a 200room list right?

but it works sometimes the other times i get an error. might be
because of recursion depth i never let the error finish.


i saw i also generate student 0 which shouldnt exist.




and the actual problem is generating all possible combinations right?
i mean i can easily generate one list that is made randomly so problem
solved.

why does one need to generate all possible lists? i guess there are
other problems where that might be needed so is this just a bad
example or am i missing something?