def getlist():
	return list(map(int, input().split()))

L = int(input())
N = int(input())
W = getlist()
W = sorted(W)
ans = 0
v = 0
for i in range(N):
	if L >= W[i] + v:
		ans += 1
		v += W[i]
	else:
		break

print(ans)