if __name__ == "__main__":
	L = int(input())
	N = int(input())
	W = sorted(list(map(int, input().split())))
	
	sum = 0
	j = 1
	
	for i in W:
		sum += i
		if sum > L:
			j -= 1
			break
		elif sum == L:
			break
		else:
			j += 1
		
	print(j)