open System

[<EntryPoint>]
let main argv =
    let L = int <| Console.ReadLine()
    let N = int <| Console.ReadLine()
    let Win = Console.ReadLine().Split(' ')
    let W = Array.create N 0

    for x in 0 .. N-1 do
        W.[x] <- (Int32.Parse Win.[x])
    done
    let W = Array.sort W

    let mutable c = 0
    let mutable size = 0
    for x in 0 .. N-1 do
        size <- size + W.[x]
        if size <= L then
            c <- c + 1
    done
    printfn "%d" c
    0