1 files changed, 19 insertions, 0 deletions

diff --git a/execs/Day06.hs b/execs/Day06.hs
new file mode 100644
index 0000000..c35fd21
--- /dev/null
+++ b/execs/Day06.hs
@@ -0,0 +1,19 @@
+
+module Main where
+
+import Data.Char (digitToInt)
+import Data.List (sort)
+import Data.Set (Set)
+import qualified Data.Set as Set
+import Control.Monad
+
+parseLines :: [String] -> [String]
+parseLines allLines = unwords first : next
+  where (first, rest) = break null allLines
+        next = if null rest then [] else parseLines (tail rest)
+
+main :: IO ()
+main = do
+    n <- parseLines . lines <$> readFile "input/06"
+    print $ sum $ map (Set.size . Set.fromList . filter (/= ' ')) n
+    print $ sum $ map (Set.size . foldl1 Set.intersection . map Set.fromList . words) n