module Main where

type Input  = [Int]

type Output = [String]

parse :: String -> Input
parse =
    map read
    . tail
    . lines

solve :: Input -> Output
solve =
    map conv

conv :: Int -> String
conv 1 = "10"

conv n =
    show (9 * 10 ^ (n - 1))

render :: Output -> String
render = unlines

main :: IO ()
main =
    interact
        ( render
        . solve
        . parse
        )