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: Accepted)

<?php
  $input = trim(fgets(STDIN));
  $input = str_replace(array("\r\n", "\r", "\n"), "", $input);
  $array = explode(" ", $input);

  $sum = 0;
  for( $i = 1; $i <= $array[0]; $i++){
    $input_num = str_split($i);
    $num = array_sum($input_num);
    
    if( $num >= $array[1] && $num <= $array[2]){
      $sum+=$i;
    }
  }
  
  echo $sum;
?>