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

for i in range(N):
    minj = i
    for j in range(i,N):
        if W[j] < W[minj]:
            minj = j
    if i != minj:
        W[i], W[minj] = W[minj], W[i]

s = 0
count = 0
for i in range(N):
    if s + W[i] <= L:
        s += W[i]
        count += 1
    else:
        break

print(count)