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module Y2018.M11.D26.Exercise where
An IQ puzzler:
Four (A, B, C and D) suspects were interrogated:
A said: C won't cheat unless B cheated.
B said: Either A or B cheated.
C said: B didn't cheat, I cheated.
D said: B cheated.
Only one person is lying. Who is lying and who(st(s)) cheated?
data Suspect = A | B | C | D
deriving (Eq, Ord, Enum, Show)
type Cheated = Bool
type Liar = Bool
data Statement = AsYouDeclare
statements :: [Statement]
statements = undefined
data Answer = Ans { liar :: Suspect, cheaters :: [Suspect] }
deriving (Eq, Ord, Show)
solver :: [Statement] -> [Answer]
solver statements = undefined