L = int(input()) # L:箱の幅
N = int(input()) # N:ブロックの数
*W_list,=map(int,input().split())
W_list.sort()
wsum = 0
count = 0
while wsum + W_list[0] <= L:
   wsum += W_list[0]
   del W_list[0]
   count += 1
print(count)