open System

let N, M = Console.ReadLine().Split() |> Array.map int |> fun a -> a.[0], a.[1]

let graph : (int list) array = Array.create N []
let marked = Array.create N false

for _ in 1 .. M do
    let u, v = Console.ReadLine().Split() |> Array.map int |> fun a -> a.[0], a.[1]
    graph.[u] <- v :: graph.[u]
    graph.[v] <- u :: graph.[v]

for i in N - 1 .. -1 .. 0 do
    if graph.[i] |> List.exists (fun j -> j > i && not marked.[j]) then
        marked.[i] <- true

marked
|> Array.rev
|> Array.skipWhile (fun x -> not x)
|> Array.map (fun x -> if x then "1" else "0")
|> System.String.Concat
|> Console.WriteLine