import Data.List
import Data.Ord
import System.IO

replace i xs = xs1 ++ (x':x:xs2)
 where (xs1,(x:x':xs2)) = splitAt i xs

main = do
 getLine
 as <- map read . words <$> getLine
 let output = nmk as
 print (length output)
 mapM_ (putStrLn . unwords . map show) output
 hFlush stdout
 getLine

nmk :: [Int] -> [[Int]]
nmk = reverse . nmk' []
 where
  nmk' acc xs'
   | sort xs' == xs' = acc
   | otherwise = let i = ikado (zip [0..] xs') in nmk' ([i,i+1]:acc) (replace i xs')
  ikado ixs = fst $ fst $ head $ filter (\(ix1,ix2) -> snd ix1 > snd ix2) $ zip ixs (tail ixs)