from collections import *
from itertools import *
from functools import *
import sys,math
input = sys.stdin.readline

N = int(input())
D = list(map(int,input().split()))
msk0 = 0
msk1 = 0
for i,d in enumerate(D):
    if d<0:
        msk0 += (1<<i)
    else:
        msk1 += (1<<i)
    
INF = (1<<60)

dp = [-1]*(1<<N)
dp[0] = 100

for i in range(1<<N):
    
    if dp[i]<=0:
        continue
    
    cnd = []
    for j in range(N):
        if (i>>j)&1:
            continue
        cnd.append(j)
    
    for c in cnd:
        
        if (1<<c)&msk0:
            
            dp[i|(1<<c)] = max(dp[i|(1<<c)],dp[i] + D[c])
            
        else:
            
            dp[i|(1<<c)] = max(dp[i|(1<<c)],min(dp[i]+D[c],100*(bin(i&msk0).count('1') + 1)))
print(max(dp[-1],0))