头条就AC了一道，还是暴力的，不知道能不能给个面试机会啊

x=int(input())
y=input().strip()
l=list(map(int,y.split()))
n=0
for i in range(9):     k=i     if n<x:         for j in l:                          if k>=j:                 k+=k-j                 n+=1                                  if k<0:                     n=0                     break             elif 0<=k<j:                 k-=j-k                 n+=1                                  if k<0:                     n=0                     break             else:                 continue     elif n==x:         break
print(i-1)