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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {

            string[] あ = Console.ReadLine().Split(' ');
            int numlist = int.Parse(あ[0]);
            int min = int.Parse(あ[1]);
            int max = int.Parse(あ[2]);

            int i;
            int temp;
            int sum = 0;

            for (i = 0; i <= numlist; i++)
            {
                temp = getSomeSum(i);
                if (temp <= max && temp >= min) { sum += i; }
            }

            Console.WriteLine(sum);

        }


        static int getSomeSum(int number)
        {
            int sum=0;

            while (number != 0)
            {
                sum += number % 10;
                number /= 10;
            }


            return sum;
        }


    }
}