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)

program Project1;

{$APPTYPE CONSOLE}

uses
SysUtils;
var
n,i,j,t,a,b,c,d,sum,temp:integer;
begin
try
  { TODO -oUser -cConsole Main : abc83}
  read(n);
  read(a);
  readln(b);

  sum:=0;
  for i := 1 to n do begin
    temp:=((i mod 10) div 1)+((i mod 100) div 10)+((i mod 1000) div 100)+((i mod 10000) div 1000)+(i div 10000);
    if (temp>=a)and(temp<=b) then begin
      sum:=sum+i;
    end;
  end;
  Writeln(sum);

  readln;
except
  on E: Exception do
    Writeln(E.ClassName, ': ', E.Message);
end;
end.