import itertools

L = int(input())
N = int(input())
W = list(map(int, input().split()))

all_combinations = []
for r in reversed(range(N)):
    combinations_object = itertools.combinations(W, r)
    combinations_list = list(combinations_object)
    all_combinations += combinations_list

for comb in all_combinations:
    if sum(comb) <= L:
        print(len(comb))
        break