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 Julia (0.5.0) (judge verdict: Accepted)

function wa(x)
    res = 0
    while x > 0
        res += x % 10
        x = div(x, 10)
    end
    return res
end

function main()
    n, a, b = map(x -> parse(Int64, x), split(readline()))

    ans = 0
    for x in 1:n
        if a <= wa(x) <= b
            ans += x
        end
    end
    println(ans)
end

main()