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 Fortran (gfortran v4.8.4) (judge verdict: Accepted)

program test
	implicit none
    integer::a,b,N,ans,i,x,y
    read*,N,a,b
    ans=0
    do i=1,N
    	x=i
        y=0
    	do while(x>0)
        	y=mod(x,10)+y
        	x=x/10
        end do
        if(y>=a .and. b>=y)then
        	ans=ans+i
        end if
    end do
    print*,ans
end program test