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Author SHA1 Message Date
09327d5a35 d20p2 2023-12-20 03:55:55 -08:00
3475d23962 cleanup d20p1 2023-12-20 02:49:53 -08:00
5 changed files with 1171 additions and 43 deletions

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hb -> mj
mx -> mt, NANDxz
xh -> qc
tg -> cq
kp -> NANDxz, nj
mj -> NANDjj, lv
cq -> jm
mt -> sj, NANDxz
NANDjj -> hb, lz, NANDrk, xv, vj, vh, lv
rm -> NANDbz, xq
hx -> NANDbz
xv -> lz
xx -> kp, NANDxz
pt -> vx
NANDxz -> bq, gr, sj, rv, NANDzf
vx -> NANDgf, cv
xb -> NANDxz, bq
xk -> NANDgf, rd
lv -> zk
NANDrk -> NANDgh
kn -> NANDgf, tz
NANDgh -> rx
sj -> vp
jm -> vm, NANDbz
rr -> rv, NANDxz
tz -> rz
gg -> kn
NANDcd -> NANDgh
qc -> kh, NANDbz
kb -> NANDgf
vp -> NANDxz, xx
fb -> NANDbz, tg
rd -> cp
qn -> vh, NANDjj
xr -> NANDjj
tp -> rm, NANDbz
cp -> gg
NANDbz -> NANDqx, cq, xh, fb, tg
qq -> pt, NANDgf
xq -> NANDbz, hx
gx -> NANDjj, qv
bq -> rr
cv -> NANDgf, kb
zk -> NANDjj, xv
NANDzf -> NANDgh
NANDqx -> NANDgh
vh -> gx
qv -> xr, NANDjj
lz -> qn
broadcaster -> fb, xk, gr, vj
nj -> NANDxz
gr -> NANDxz, xb
kh -> tp, NANDbz
vm -> NANDbz, xh
rz -> qq, NANDgf
NANDgf -> tz, NANDcd, rd, xk, pt, cp, gg
rv -> mx
vj -> hb, NANDjj

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:- use_module(library(dcg/basics)).
:- initialization(main, main).
% ================================ begin stupid ===============================
main([FileName|_]) :-
input(FileName, Circuit),
cycle(Circuit, 0, [], [], First-Cycle-_, Counts),
NCycles is 1000 div Cycle, Leftovers is 1000 mod Cycle,
CycleEnd1 is First + Cycle,
slice(Counts, 0, First, FirstCounts),
sumpairs(FirstCounts, FirstL-FirstH),
slice(Counts, First, CycleEnd1, CycleCounts),
sumpairs(CycleCounts, CycleL-CycleH),
slice(Counts, First, Leftovers, LeftoverCounts),
sumpairs(LeftoverCounts, LeftoverL-LeftoverH),
Answer is (FirstL + NCycles*CycleL + LeftoverL)*
(FirstH + NCycles*CycleH + LeftoverH),
write("answer="), write(Answer), nl.
sumpairs([], 0-0).
sumpairs([A-B|List], SumA-SumB) :-
sumpairs(List, A1-B1), SumA is A + A1, SumB is B + B1.
cycle(Circuit, N, Hist, Counts, First-Cycle-Hist, Counts) :-
match(Circuit, Hist, Cycle),
write("match. N="), write(N), write(", cycle="), write(Cycle), nl,
First is N - Cycle,
!.
cycle(Circuit, N, Hist, Counts, X, Y) :-
% \+ match(Circuit, Hist, _), % remove this for performance.
run([button-l-broadcaster], Circuit, NewCircuit, Ls-Hs),
NewN is N + 1,
NewHist = [Circuit|Hist],
% write(NewN), write(": "), write(Ls-Hs), write(" - "), write(NewCircuit), nl,
cycle(NewCircuit, NewN, NewHist, [Ls-Hs|Counts], X, Y).
match(Map, [Map|_], 1) :- !.
match(Map, [_|Entries], N) :-
match(Map, Entries, NextN),
N is NextN + 1.
slice(L, From, To, R):-
ToX is To + 1,
length(LFrom, From), length([_|LTo], ToX),
append(LTo, _, L), append(LFrom, R, LTo).
% ================================ end stupid ===============================
run1000(Circuit, Answer),
write(Answer), nl.
% part1
run1000(Circuit, Answer) :-

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:- use_module(library(pio)).
:- use_module(library(dcg/basics)).
:- initialization(main, main).
% This code was only used to confirm the theory. Don't run it. Look at part2.txt.
run_until(Circuit, _, Node, State, N) :- member(_-Node-State-_, Circuit), write(N), nl, !.
run_until(Circuit, Init, Node, State, N) :-
maplist(extract(Circuit), [xr, qv, gx, vh, qn, lz, xv, zk, lv, mj, hb, vj], S1),
maplist(extract(Circuit), [nj, kp, xx, vp, sj, mt, mx, rv, rr, bq, xb, gr], S2),
maplist(extract(Circuit), [hx, xq, rm, tp, kh, qc, xh, vm, jm, cq, tg, fb], S3),
maplist(extract(Circuit), [kb, cv, vx, pt, qq, rz, tz, kn, gg, cp, rd, xk], S4),
write(N), write(": "),
string_codes(Str1, S1), string_codes(Str2, S2), string_codes(Str3, S3), string_codes(Str4, S4),
write(Str1), write(" "), write(Str2), write(" "), write(Str3), write(" "), write(Str4), nl,
run([Init], Circuit, CircuitNext),
NextN is N + 1,
run_until(CircuitNext, Init, Node, State, NextN).
extract(Circuit, Cell, AsciiState) :-
member(_-Cell-StateX-_, Circuit),
AsciiState is StateX + 48.
% code to run one circuit
run([], Circuit, Circuit) :- !.
run([Src-Level-Target|Pulses], CircuitIn, CircuitOut) :-
( member(Type-Target-State-Dests, CircuitIn)
-> /*write([Src, Level, Target]), write(" -> "),
write([Type, Target, State, Dests]), write(" = "),*/
call(Type, Src, Level, State, NewState, Out),
send(Target, Out, Dests, AdditionalPulses),
% write(NewState-AdditionalPulses), nl,
select(Type-Target-State-Dests, CircuitIn,
Type-Target-NewState-Dests, Circuit1),
append(Pulses, AdditionalPulses, NewPulses),
run(NewPulses, Circuit1, CircuitOut)
; run(Pulses, CircuitIn, CircuitOut)
).
broadcaster(_, l, x, x, l).
ff(_, h, State, State, none).
ff(_, l, 0, 1, h).
ff(_, l, 1, 0, l).
nand(Src, Level, State, NewState, OutLevel) :-
select(Src-_, State, Src-Level, NewState),
(maplist([_-h]>>(true), NewState) -> OutLevel = l; OutLevel = h).
send(_, none, _, []).
send(From, Level, Dests, Pulses) :-
\+ Level = none,
maplist({Level}/[Dest, From-Level-Dest]>>(true), Dests, Pulses).
% input initialization
prefill_nands([], Circuit, Circuit).
prefill_nands([_-Src-_-Dests|Nodes], CircuitIn, CircuitOut) :-
convlist(
{CircuitIn}/[Dest, Dest]>>(member(nand-Dest-_-_, CircuitIn)),
Dests, NandDests),
foldl(fill_one_nand(Src), NandDests, CircuitIn, Circuit1),
prefill_nands(Nodes, Circuit1, CircuitOut).
fill_one_nand(Src, Nand, CIn, COut) :-
select(nand-Nand-State-Dests, CIn, nand-Nand-[Src-l|State]-Dests, COut).
% input parsing stuff below
input(FileName, Circuit) :-
phrase_from_file(modules(EmptyCircuit), FileName),
prefill_nands(EmptyCircuit, EmptyCircuit, Circuit).
modules([]) --> eos, !.
modules([Module|Modules]) --> module(Module), "\n", modules(Modules).
module(broadcaster-broadcaster-x-Dests) --> "broadcaster -> ", dests(Dests).
module(ff-Name-0-Dests) --> "%", node(Name), " -> ", dests(Dests).
module(nand-Name-[]-Dests) --> "&", node(Name), " -> ", dests(Dests).
dests([Dest]) --> node(Dest).
dests([Dest|Dests]) --> node(Dest), ", ", dests(Dests).
node(Name) --> string_without(", \n", NameStr), {atom_codes(Name, NameStr)}.

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gh <- [qx, zf, cd, rk]
xr, qv, gx, vh, qn, lz, xv, zk, lv, mj, hb, vj (jj) <- (111010010101) vj, qv, zk, gx, xr, qn, mj
nj, kp, xx, vp, sj, mt, mx, rv, rr, bq, xb, gr (xz) <- (111101101011) gr, nj, vp, rr, xb, xx, mt, kp, mx
hx, xq, rm, tp, kh, qc, xh, vm, jm, cq, tg, fb (bz) <- (111111011001) vm, kh, xq, tp, fb, qc, jm, hx, rm
kb, cv, vx, pt, qq, rz, tz, kn, gg, cp, rd, xk (gf) <- (111011010001) rz, cv, qq, kb, kn, xk, vx
111010010101 = 3733
111101101011 = 3947
111111011001 = 4057
111011010001 = 3793
All 4 are primes.
LCD = 226732077152351