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

W.sort()

bool = True
length = 0
count = 0
for count in range(N):
    if length + W[count] <= L:
        length += W[count]
    else:
        bool = False
        break

if bool:
    count += 1
print(count)