open System

let L = Console.ReadLine() |> int
let N = Console.ReadLine() |> int
let Wn= Console.ReadLine().Split(' ')
        |> Array.map (fun i -> i |> int )
        |> Array.toList

let Wn2 = Wn |> List.sort
let mutable sum = 0
let mutable i = 0

for num in Wn2 do 
  sum <- sum + num
  if ( sum <= L ) then i <- i + 1

Console.WriteLine i