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Day 4: 454

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Christoph Stahl 2021-12-04 17:45:19 +01:00
parent fd70c7b371
commit a49b79d432
1 changed files with 4 additions and 5 deletions
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9
d4golf.hs
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@ -4,12 +4,11 @@ a=m.m.m.k
h=any$all i
a?b|c a,i b=b|let=l 0
k d i|i==l d=r d|let=i
w p(n,t)=head$rights$p(n#t)
w p=head.rights.p
(x:y)#f=m(x!)(a x f):y#a x f
v[]=[];v s=tail(take 6 s):v(drop 6 s)
s(v:t)|'.'>v=[]:s t|(x:u)<-s t=(v:x):u
p(x:y)=(m read$s x,v$m(m(l.read).words)y)
q i=(\(b,h:_)->z(?)(last b)h)$span(any c)i
p(x:y)=m read(s x)#v(m(m(l.read).words)y)
m=map;r=pure;l=Left;c=isLeft;z=zipWith;i=isRight
main=interact$show.((,).w q<*>w(filter i=<<)).p.lines
x!d|h d||h(foldr(z(:))e d)=r$(x*)$sum$lefts=<<d|let=l 0
x!d|h d||h(foldr(z(:))e d)=r$(x*)$sum$lefts=<<d|let=l 0
main=interact$show.((,).w((\(b,h:_)->z(?)(last b)h).span(any c))<*>w(filter i=<<)).p.lines