container_size = int(input())
num_on_box = int(input())
wl = sorted(list(map(int, input().split()))) # each block's width
current_width = 0
for i, w in enumerate(wl, start=0):
  if current_width + w > container_size:
    print(i)
    exit()
  else:
    current_width += w

print(num_on_box)