import strutils, sequtils, algorithm
let
  l = stdin.readline.parseInt
  n = stdin.readline.parseInt
  w = stdin.readline.split.map(parseInt).sorted(system.cmp[int])
var
  (ans,acc) = (0,0)
for v in w:
  acc += v
  if acc <= l:
    ans += 1
  else:
    break
echo(ans)