From 22f2d0cfcb9729300a4768a8592d77a12b1c2eeb Mon Sep 17 00:00:00 2001
From: Christoph Stahl <christoph.stahl@tu-dortmund.de>
Date: Sat, 4 Dec 2021 17:26:34 +0100
Subject: [PATCH] Day 4: 470

---
 d4golf.hs | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/d4golf.hs b/d4golf.hs
index 6446431..872edc6 100644
--- a/d4golf.hs
+++ b/d4golf.hs
@@ -6,17 +6,16 @@ l=Left
 i=isRight
 c=isLeft
 e=[]:e
-s[]=[]
-s(v:t)|'.'>v=' ':s t|let=v:s t
+s(v:t)|'.'>v=[]:s t|(x:u)<-s t=(v:x):u
 v[]=[]
 v s=tail(take 6 s):v(drop 6 s)
-d%i|i==l d=r d|let=i
-a=m.m.m.(%)
+k d i|i==l d=r d|let=i
+a=m.m.m.k
 h=any$all i
 x!d|h d||h(foldr(z(:))e d)=r$(x*)$sum$lefts=<<d|let=l 0
 (x:y)#f=m(x!)(a x f):y#a x f
 a?b|c a,i b=b|let=l 0
-q i=(\(a:b:_)->z(?)a b)$drop(length(takeWhile(any c)i)-1)i
+q i=(\(b,h:_)->z(?)(last b)h)$span(any c)i
 w p(n,t)=head$rights$p(n#t)
-p(x:y)=(m read$words$s x,v$m(m(l.read).words)y)
+p(x:y)=(m read$s x,v$m(m(l.read).words)y)
 main=interact$show.((,).w q<*>w(filter i=<<)).p.lines
\ No newline at end of file