l=int(input())
n=int(input())
w=list(map(int,input().split(" ")))
w.sort()
ans = 0
test = 0
i=0
while True:
	if i >= len(w):
		break
	test += w[i]
	if test > l :
		break
	else:
		ans = i + 1 
		i += 1
print(ans)