content: import Numeric.Natural
  
  
  logistic :: Num a => a -> a -> Natural -> a
  logistic rate start = f
    where
      f 0 = start
      f n = rate * f (n - 1) * (1 - f (n - 1))
  
  
  
  
  logistic0 :: Fractional a => Natural -> a
  logistic0 = logistic 3.741 0.00079
  ex1 :: Natural
  ex1 = undefined
  
  
  ex20 :: Fractional a => [a]
  ex20 = [1, logistic0 ex1, 3]
  
  ex21 :: Fractional a => a
  ex21 = head ex20
  
  ex22 :: Fractional a => a
  ex22 = ex20 !! 2
  
  ex23 :: Fractional a => [a]
  ex23 = drop 2 ex20
  
  ex24 :: Fractional a => [a]
  ex24 = tail ex20
  
  
  ex31 :: Natural -> Bool
  ex31 x = x < 7 || logistic0 (ex1 + x) > 2
  
  ex32 :: Natural -> Bool
  ex32 x = logistic0 (ex1 + x) > 2 || x < 7
  ex33 :: Bool
  ex33 = ex31 5
  
  ex34 :: Bool
  ex34 = ex31 7
  
  ex35 :: Bool
  ex35 = ex32 5
  
  ex36 :: Bool
  ex36 = ex32 7
  
  
  semn :: [Integer] -> String
  semn = undefined
  
  
  semnFold :: [Integer] -> String
  semnFold = foldr op unit
     where
       unit = undefined
       op = undefined
       
       
       
  matrice :: Num a => [[a]]
  matrice = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]     
  
  
  corect :: [[a]] -> Bool 
  corect = undefined 
  
  el :: [[a]] -> Int -> Int -> a 
  el = undefined 
  
  transforma :: [[a]] -> [(a, Int, Int)]
  transforma = undefined