use strict;
use warnings;

my $m_num = <>;
my @mons = split ' ', <>;
my %point = (pres => 100, max => 100);

my @dp;
for(my $i = 0; $i < 1<<$m_num; $i++){
  $dp[$i] = [0, 0];
}
$dp[0] = [100, 100];

my $ni = 0;
for(my $i = 0; $i < 1<<$m_num; $i++){
  next if($dp[$i][0] < 1);
  for my $j (0..$m_num-1){
    next if(($i>>$j) % 2);

    my @np = @{$dp[$i]};
    if(0 < $mons[$j]){
      $np[0] += $mons[$j];
      $np[0] = $np[1] < $np[0] ? $np[1]: $np[0];
    }else{
      if($np[0] + $mons[$j] > 0){
        $np[0] += $mons[$j];
        $np[1] += 100;
      }else{
        $np[0] = 0;
      }
    }
    $ni = $i | 1 << $j;
    $dp[$ni] = $dp[$ni][0] < $np[0] ? \@np : $dp[$ni];
  }
}
print $dp[(1<<$m_num)-1][0];