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

W.sort(cmp)

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

echo cnt