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day6: add haskell solution

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Xiretza 2020-12-06 07:38:48 +01:00
parent 8a359603d5
commit d6f5591e66
2 changed files with 10 additions and 0 deletions
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2020/README.md
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@ -11,3 +11,4 @@ https://adventofcode.com/2020/
| 3 | `**` | `**` | |
| 4 | `**` | `**` | |
| 5 | | `**` | |
| 6 | | `**` | |

9
2020/day6/day6.hs Normal file
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@ -0,0 +1,9 @@
import AoC
import qualified Data.Set as S
import Data.Set (Set)
main = runAoC ((fmap . fmap) S.fromList . splitOnEmptyLines) part1 part2
where part1 = countSetsFolded S.union
part2 = countSetsFolded S.intersection
countSetsFolded f = sum . map (S.size . foldr1 f)