L = int(raw_input())
N = int(raw_input())
W = raw_input()
W_array = W.split()
W_array.sort()

flag = 0
i = 0
box_num =0
W_sum = 0
while flag == 0:
	W_sum +=int(W_array[i])
	if W_sum > L:
		break
	else:
		box_num +=1
		i +=1
print  box_num