Day 3: 294

d3golf.hs

@@ -1,13 +1,10 @@
 import Data.List
+e=transpose
+h=head
+m=map
+l=length
 d=foldr(\x y->2*y+x)0.reverse
-v=(\i->i*(4095-i)).d.m
+c q=h.q.sortBy((.l).compare.l).group.sort
-c q=read.pure.head.q.sortBy((.length).compare.length).group.sort
+f%xs|xs==[[]]=[]|i<-c f$h$e xs=i:f%m tail((filter.(.h).(==))i xs)
-m=map(c head).transpose
+t x=d(last%x)*d(h%x)
-startsWith d=filter((==d).pure.head)
+main=interact$show.((,).t<*>(\i->i*(4095-i)).d.m(c h).e).m(m((-48+).fromEnum)).lines
-mult f[[]]=[]
-mult f xs=do
-    let i=c f$head$transpose xs
-    let s=map tail$startsWith(show i)xs
-    i:mult f s
-t x=(d $ mult last x)*(d $ mult head x)
-main=interact$show.((,).t<*>v).lines