my $total_number = <STDIN>;
chomp ($total_number);

my @numbers;

for (my $count = 0; $count<$total_number; $count++){
    my $number = <STDIN>;
    chomp ($number);
    push @numbers, $number;
}

#print "@numbers\n";

my $ans = 0;
$ans += $_ for @numbers;

print "$ans\n";