java: add solution for year 2016, day 25 #118
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This should have been done when the `tgl` instruction was introduced, but I forgot it...
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That concludes year 2016!
This final assembunny problem could of course be solved by reverse engineering, but I did a more "soft reverse engineering" this time. Instead of trying to study the code in detail, I just ran the program for a couple of inputs (i.e. values of
a), and noted the values of the registers as well as what was output. From there I solved the problem -- read more in the comments of thepart1function.I think it is a little bit sad that all of these assembunny problems did not really require you to implement and use your VM -- you could just reverse engineer everything instead. I liked year 2019 better that way: you really had to implement the intcode VM there, since several of the problems more heavily relied on actually running intcode programs, not simply reverse engineer them.
Anyway, rant over. I am happy that I am done with year 2016 now! Now there is only a few days each left in years 2017 and 2018 before I have completed all of the puzzles.