def main():
  WIDTH_BOX = int(input())
  N_BLOCK = int(input())
  width_blocks = list(map(int, input().split()))

  width_blocks.sort()
  width_blocks.append(99999)


  current_width = 0
  for target_idx, block in enumerate(width_blocks):
    current_width += block

    if current_width > WIDTH_BOX:
      print(target_idx)
      return

main()