... and it's one of those "days" that part 2 is ridiculously easy cf
part 1 !!!
Mike
On 15/01/2022 21:15, 'Michael Day' via Programming wrote:
Yes, that's my guess. I called them p q & r, and found that p = 1 or
26 as q is positive or negative.
So: having got one machine to run 14 times on different values of p q
r and the previous Z, I worked back
from Z = 0 output on the 14th machine, saving which W & Zs gave rise
to 0, then using those Zs on the
13th machine ....
But that gave me potentially a lot of Zs - I haven't counted - so I
then worked forward from the first machine
finding only 1452 14-ples giving rise to a final zero. Very messy - I
didn't really code it - but it worked!
Haven't got round to part 2 yet.
Mike
On 15/01/2022 18:12, Raul Miller wrote:
Actually, another caution here: it might be that other people's puzzle
inputs used a different block structure from my block structure.
Probably not -- it's probably the case that only my A, B and C values
differed for different people. But .. that's just "probably" because I
haven't looked at other people's puzzle input.
FYI,
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