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module Main where
import Data.Bits
newtype Input = Input { getInput :: Bool }
deriving (Show)
data Gate = And
| Or
| Xor
| Nand
| Nor
deriving (Show)
data Circuit = In Input
| Node Gate Circuit Circuit
deriving (Show)
eval :: Circuit -> Bool
eval (In val) = getInput val
eval (Node And c1 c2) = eval c1 .&. eval c2
eval (Node Or c1 c2) = eval c1 .|. eval c2
eval (Node Xor c1 c2) = eval c1 `xor` eval c2
eval (Node Nand c1 c2) = complement $ eval c1 .&. eval c2
eval (Node Nor c1 c2) = complement $ eval c1 .|. eval c2
main :: IO ()
main = print . eval $ Node And (In . Input $ True) (In . Input $ True)
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