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

sum = 0

for i in range(N):
	sum += W[i]
	if sum > L:
		print(i)
		break
	elif sum == L:
		print(i + 1)
		break

if sum <= L:
	print(N)