deletions | additions       diff --git a/a) As few classrooms as possible.tex b/a) As few classrooms as possible.tex  index 4f0300a..5ba31ab 100644  --- a/a) As few classrooms as possible.tex  +++ b/a) As few classrooms as possible.tex 
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maxcol <- 0  for i in courses:  while (size(collisions) (len(collisions)  > 0 and !collides(i, collisions.peekFirst())): collisions.removeFirst()    collisions.add(i)