diff --git a/20/part1.pl b/20/part1.pl
index 7c3fee8..6669678 100644
--- a/20/part1.pl
+++ b/20/part1.pl
@@ -2,51 +2,10 @@
 :- 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) :-