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 Pascal (FPC 2.6.2) (judge verdict: Accepted)

var
 i,a,b,c,d,e,s,n,m,k:longint;
begin
 read(k,n,m);
 for i:=1 to k do 
  begin
   a:=i div 10000;
   b:=i mod 10000 div 1000;
   c:=i mod 1000 div 100;
   d:=i mod 100 div 10;
   e:=i mod 10;
   if (a+b+c+d+e>=n) and (a+b+c+d+e<=m) then s:=s+i;
  end;
  writeln(s);
  end.