Harry: 6, yacc/lex: 3

Well, these two exercises just required modifying Borja's code (from which he had, of course, removed all comments save for one about a certain section having some memory leaks), not writing it from scratch... but I'll count them. I got the lab in *just* on time. The yacc file generated 2 shift/reduce conflicts, IIRC - oh wow, on checking, that's actually 2 reduce/reduce conflicts, that's really bad - but the code works, so yay.