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

W.sort()

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

print(result)