christofsteel/aoc2021
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Day 4: rearranged

Browse source
This commit is contained in:
Christoph Stahl 2021-12-04 17:35:37 +01:00
parent 22f2d0cfcb
commit 355609ae28
1 changed files with 10 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
d4golf.hs
View file

@ -1,21 +1,20 @@
import Data.Either import Data.Either
m=map m=map
z=zipWith e=[]:e
r=pure r=pure
l=Left l=Left
i=isRight
c=isLeft c=isLeft
e=[]:e z=zipWith
s(v:t)|'.'>v=[]:s t|(x:u)<-s t=(v:x):u i=isRight
v[]=[]
v s=tail(take 6 s):v(drop 6 s)
k d i|i==l d=r d|let=i
a=m.m.m.k a=m.m.m.k
h=any$all i h=any$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 a?b|c a,i b=b|let=l 0
q i=(\(b,h:_)->z(?)(last b)h)$span(any c)i k d i|i==l d=r d|let=i
w p(n,t)=head$rights$p(n#t) w p(n,t)=head$rights$p(n#t)
(x:y)#f=m(x!)(a x f):y#a x f
v[]=[];v s=tail(take 6 s):v(drop 6 s)
s(v:t)|'.'>v=[]:s t|(x:u)<-s t=(v:x):u
p(x:y)=(m read$s x,v$m(m(l.read).words)y) p(x:y)=(m read$s x,v$m(m(l.read).words)y)
q i=(\(b,h:_)->z(?)(last b)h)$span(any c)i
main=interact$show.((,).w q<*>w(filter i=<<)).p.lines 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