L = int(input())
N = int(input())

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

W.sort()

res = 0
count = 0

for i in range(N):
    if res > L:
        break
    else:
        res += W[i]
        count += 1

if res>L:
    print(count-1)
else:
    print(count)