Problem:
Score : 200 points

Problem Statement

Find the sum of the integers between 1 and N (inclusive), whose sum of digits written in base 10 is between A and B (inclusive).

Constraints

1 \leq N \leq 10^4

1 \leq A \leq B \leq 36

All input values are integers.

Input

Input is given from Standard Input in the following format:

N A B

Output

Print the sum of the integers between 1 and N (inclusive), whose sum of digits written in base 10 is between A and B (inclusive).

Sample Input 1

20 2 5

Sample Output 1

84

Among the integers not greater than 20, the ones whose sums of digits are between 2 and 5, are: 2,3,4,5,11,12,13,14 and 20. We should print the sum of these, 84.

Sample Input 2

10 1 2

Sample Output 2

13

Sample Input 3

100 4 16

Sample Output 3

4554

Solution in Perl (v5.18.2) (judge verdict: Wrong Answer)

my ($n, $a, $b) = map {$_-0}split / /, <STDIN>;

my $s = 0;
for(my $i = 1; $i <= $n; $i++) {
    my $all = 0;
    for(my $p = 1; $i > $p / 10; $p *= 10){
        $all += int($i / $p % ($p * 10));
    }
    next if $all < $a or $all > $b;
    $s += $i;
}
print $s;