It seems that some of you do not understand that you should make sure
your program will compile before submitting it. From the second week
we will enforce a "yellow card, red card" system. If you submit a program
that does not compile, you will be given a yellow card. If the same thing
happens again, you will be given a red card and you will not be able to
submit your program to that problem.
TAs please implement this "yellow card, red card" system before the next
meeting on 09/20.