import Control.Applicative
import Control.Monad
import Control.Monad.ST
import Data.Functor
import Data.Function
import Data.Monoid
import Data.Maybe
import Data.List
import qualified Data.Foldable as Foldable
import qualified Data.Set as Set
--import qualified Data.Sequence as Sequence
import Data.List.Split
import Data.Bits
import Data.Char
import Data.Ix
import Data.Ratio
import Data.Ord
import Data.Tuple
--import Data.Array
--import Data.Array.Unboxed
import Data.Array.IArray
import Data.Array.MArray
import Data.Array.IO
import Data.Array.ST
import Data.IORef
import Data.STRef
-- import System.IO.Unsafe

dist i j = sum $ drop f $ take t $ [0,6,7,5,5,20,15]
  where
    f = min i j
    t = max i j

toll i j = x f t
  where
    f = min i j
    t = max i j
    x n 2 = [0,300]!!n
    x n 3 = [0,500,350]!!n
    x n 4 = [0,600,450,250]!!n
    x n 5 = [0,700,600,400,250]!!n
    x n 6 = [0,1350,1150,1000,850,600]!!n
    x n 7 = [0,1650,1500,1350,1300,1150,500]!!n
    

time h m = 60*h + m
lt = time 17 30
rt = time 19 30
off t = lt<=t && t<=rt

main = do
    d <- getInt
    when (d/=0) $ do
        td <- apply2 time <$> getInts
        a <- getInt
        ta <- apply2 time <$> getInts
        print $ if xor (off td) (off ta) && (dist d a <= 40) then toll d a `div` 2 `divCeil` 50 * 50 else toll d a
        main

-- templete
readInt = read :: String -> Int
readInteger = read :: String -> Integer
readDouble = read :: String -> Double
getInt = readLn :: IO Int
getInts = map readInt . words <$> getLine
getInteger = readLn :: IO Integer
getIntegers = map readInteger . words <$> getLine
getDouble = readLn :: IO Double
sjoin :: (Show a) => [a] -> String
sjoin = unwords . map show
cond :: a -> a -> Bool -> a
cond t f c = if c then t else f
apply2 :: (a -> a -> b) -> [a] -> b
apply2 f [x,y] = f x y
apply3 :: (a -> a -> a -> b) -> [a] -> b
apply3 f [x,y,z] = f x y z
apply4 :: (a -> a -> a -> a -> b) -> [a] -> b
apply4 f [x,y,z,w] = f x y z w
fnBin :: (b -> c -> d) -> (a -> b) -> (a -> c) -> a -> d
fnBin op f g x = op (f x) $ g x
fnTuple :: (a -> b, a -> c) -> a -> (b, c)
fnTuple (f,g) a = (f a, g a)
replace :: (Eq a) => a -> a -> [a] -> [a]
replace x y = map (\z -> if z==x then y else z)
modifyArray :: (Ix i, MArray a e m) => a i e -> i -> (e -> e) -> m ()
modifyArray arr ix f = readArray arr ix >>= writeArray arr ix . f
dictCompare :: [a -> a -> Ordering] -> a -> a -> Ordering
dictCompare [] _ _ = EQ
dictCompare (f:fs) x y = let c = f x y in if c==EQ then dictCompare fs x y else c
binMap :: (a -> a -> b) -> [a] -> [b]
binMap f (x:xs@(y:_)) = f x y : binMap f xs
binMap _ _ = []
splitRec :: Int -> [a] -> [[a]]
splitRec _ [] = []
splitRec n xs = let (y,ys) = splitAt n xs in y : splitRec n ys
infixl 7 `divCeil`
divCeil :: Integral a => a -> a -> a
x `divCeil` y = (x+y-1) `div` y
-- templete

