#1行目
width = int(input())

#2行目
blocknum = int(input())

#3行目
blocksize = input()
split_blocksize=map(int, blocksize.split()).sort()

sum = 0
ans = 0
for n in split_blocksize:
    if width - sum <= n:
        sum += n
        ans += 1
    else:
        break
        
print(ans)