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

W.sort(cmp)

while true:
  if W.len == 0:
    break
  elif L < W[0]:
    break
  else:
    cnt += 1
    L -= W[0]
    W.delete(0)

echo cnt