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

for i in range(N):
    for j in range(N):
        if W[j] >= W[i]:
            tmp = W[j]
            W[j] = W[i]
            W[i] = tmp

sum_wide = 0
ans = 0
while True:
    if sum_wide + W[ans] > L:
        break
    sum_wide += W[ans]
    ans += 1
print(ans)