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 PHP (5.6.30) (judge verdict: Wrong Answer)

<?php
$N = trim(fgets(STDIN));
$A = trim(fgets(STDIN));
$B = trim(fgets(STDIN));

$res = 0;

for($i = 1;$i < $N + 1;$i++){
    $sum = 0;
    for($j = 0;$j < strlen(strval($i));$j++){
        $sum += intval(strval($i)[$j]);
    }
    if($sum >= $A && $sum <= $B) $res += $i;
}

print $res;
?>