import           Control.Monad
import qualified Data.ByteString.Char8       as BSC8
import           Data.IORef
import           Data.Maybe
import qualified Data.Vector.Unboxed.Mutable as VUM

main :: IO ()
main = do
  getLine
  ax <- getIntList
  -- ans = 0 p = 1 f = 2
  dp <- VUM.replicate 3 (0 :: Int)
  forM_ ax $ \a -> do
    p   <- VUM.unsafeRead dp 1
    f   <- VUM.unsafeRead dp 2
    if a == p
      then do
        VUM.unsafeModify dp succ 0
        VUM.unsafeWrite dp 2 1
      else if f /= 0
        then do
          VUM.unsafeWrite dp 1 0
          VUM.unsafeWrite dp 2 0
        else do
          VUM.unsafeModify dp succ 0
          VUM.unsafeWrite dp 2 1
    VUM.unsafeWrite dp 1 a
  print =<< VUM.unsafeRead dp 0

readInt :: BSC8.ByteString -> Int
readInt = fst . fromJust . BSC8.readInt
{-# INLINE readInt #-}
getInt :: IO Int
getInt = readInt <$> BSC8.getLine
{-# INLINE getInt #-}
readIntList :: BSC8.ByteString -> [Int]
readIntList = map readInt . BSC8.words
{-# INLINE readIntList #-}
getIntList :: IO [Int]
getIntList = readIntList <$> BSC8.getLine
{-# INLINE getIntList #-}