import strutils, sequtils, algorithm
var
  L, N = stdin.readLine.parseInt
  W = stdin.readLine.split.map(parseInt)
  cnt = 0

W.sort(cmp)

while W.len > 0:
  if L >= W[0]:
    cnt += 1
    L -= W[0]
    try:
      W.delete(0)
    except:
      discard
  else:
    break

echo cnt