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

box = []

for i in range(len(W_n)+1):

    if sum(box) > L:
        box.pop()
        break

    if len(W_n) > i:
        box.append(W_n[i])

print(len(box))