#1行目
width = int(input())

#2行目
blocknum = int(input())

#3行目
blocksize = input().split()
blocksize.sort()

sum = 0
ans = 0
for n in range(blocknum):
    if width - sum <= blocksize[n]:
        sum += blocksize[n]
        ans += 1
    else:
        break
        
print(ans)