main :: IO ()
main = do
  [a, b, c] <- fmap words getLine
  let inta = read a :: Int
  let intb = read b :: Int
  let intc = read c :: Int
  putStrLn $ range inta intb intc

range :: Int -> Int -> Int -> String
range a b c| a < b && b < c = "Yes"
            | otherwise = "No"