def read_int(): return int(input())
def read_int_list(): return list(map(int, input().split()))


L = read_int()
N = read_int()
Ws = read_int_list()
cnt = 0
for w in sorted(Ws):
    if L - w >= 0:
        cnt += 1
        L -= w
    else:
        break
print(cnt)