add x (Node y left right) | x == y    = Node y left right
                          | x < y     = Node y (add x left) right
                          | otherwise = Node y left (add x right)

module Main where
 
import System.Environment
 
womenCount :: [[Char]] -> Int
womenCount [] = 0
womenCount ([_,_,_,_,_,_,_,_,_,p,_]:xs)
  | elem p ['0','2','4','6','8'] = 1 + womenCount xs
  | otherwise = womenCount xs
 
main = do 
  [input] <- getArgs
  inText <- readFile input
  let counter = womenCount (lines inText)
  print(counter)

decCount :: [[Char]] -> [Int] -> [Int]
 
printResult :: [Int] -> String
printResult [d1,d2,d3,d4,d5,d6,d7,d8,d9,d10] =
  "1901 - 1910: " ++ (show d1) ++
  "\n1911 - 1920: " ++ (show d2) ++
  "\n1921 - 1930: " ++ (show d3) ++
  "\n1931 - 1940: " ++ (show d4) ++
  "\n1941 - 1950: " ++ (show d5) ++
  "\n1951 - 1960: " ++ (show d6) ++
  "\n1961 - 1970: " ++ (show d7) ++
  "\n1971 - 1980: " ++ (show d8) ++
  "\n1981 - 1990: " ++ (show d9) ++
  "\n1991 - 2000: " ++ (show d10)