module Main
  ( main
  )
where

import           Control.Applicative
import           Control.Monad
import           Data.List
import           Data.Array
import           Data.Char
import           Data.Bits
import qualified Data.ByteString.Char8 as BS
import Data.Maybe

parseInt = fst . fromJust . BS.readInt
readInt = parseInt <$> BS.getLine
readIntList = map parseInt . BS.words <$> BS.getLine

main = do
  n <- readInt
  [s, t] <- words <$> getLine
  putStrLn $ merge s t

merge (x:xs) (y:ys) = x:y:merge xs ys
merge [] [] = []
