L = int(input())
N = int(input())
W = list(map(int, input().split()))
W.sort()
goukei = 0
i = 0
while goukei <= L:
	try:
		if goukei + W[i] <= L:
			goukei += W[i]
			i += 1
		else:
			break
	except:
			break
print(i)