import qualified Data.ByteString.Char8 as B
import qualified Data.Set as S

type Heap = S.Set (Integer,Int)

main = do
  [_,k] <- map read . words <$> getLine
  qs <- map readIntegers . B.lines <$> B.getContents
  let hmax = S.empty
  let hmin = S.empty
  let (_, _, ans) = foldl (query k) (hmax, hmin, []) (zip qs [0..])
  mapM_ print (reverse ans)

query :: Int -> (Heap, Heap, [Integer]) -> ([Integer], Int) -> (Heap, Heap, [Integer])
query k (hmax, hmin, acc) ([1,x],i)
  | S.size hmax < k = (S.insert (x,i) hmax, hmin, acc)
  | x < xmax = (S.insert (x,i) hmax', S.insert (xmax,j) hmin, acc)
  | otherwise = (hmax, S.insert (x,i) hmin, acc)
  where
    ((xmax,j), hmax') = S.deleteFindMax hmax
query k (hmax, hmin, acc) ([2],_)
  | S.size hmax < k = (hmax, hmin, (-1):acc)
  | S.null hmin = (hmax', hmin, xmax:acc)
  | otherwise = (S.insert (xmin,j) hmax', hmin', xmax:acc)
  where
    ((xmax,i), hmax') = S.deleteFindMax hmax
    ((xmin,j), hmin') = S.deleteFindMin hmin

readInteger :: B.ByteString -> Integer
readInteger = maybe undefined fst . B.readInteger

readIntegers :: B.ByteString -> [Integer]
readIntegers = map readInteger . B.words