// Learn more about F# at http://fsharp.org open System [] let main _ = let n = stdin.ReadLine() |> int for _ in 1 .. n do let d = stdin.ReadLine() |> int if d = 1 then "10" else let suf = String.concat "" (Seq.init (d - 1) (fun _ -> "0")) "9" + suf |> printfn "%s" 0 // return an integer exit code