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Diffstat (limited to '2017/1.hs')
-rw-r--r-- | 2017/1.hs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/2017/1.hs b/2017/1.hs new file mode 100644 index 0000000..884e00e --- /dev/null +++ b/2017/1.hs @@ -0,0 +1,12 @@ +import Control.Monad +import Data.Char + +main :: IO () +main = do + input <- liftM (filter isDigit) $ readFile "1.in" + + print $ sum $ map (\(a,b) -> read [a] * fromEnum (a == b)) $ + zip input (tail (cycle input)) + + print $ sum $ map (\(a,b) -> read [a] * fromEnum (a == b)) $ + zip input (drop (length input `div` 2) (cycle input)) |