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type Vertex = Intможно написать
type Edge = (Int, Int)
type Graph = (Int, [Edge])
type FCFunctor = (Graph, Vertex -> Vertex , Edge -> [Edge])
type FCTrans = (FCFunctor, FCFunctor, Vertex -> [Edge])
isNatTrans: FCTrans -> Bool
IsNatTrans (f, g, t) =