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 Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;

class Main {
    public static void main(String args[]) {
        Scanner sc = new Scanner(System.in);
      
        int n = sc.nextInt();
        int a = sc.nextInt();
        int b = sc.nextInt();

        int sumAll = 0;

        for(int i=1;i <= n; i++) {
            String t = String.valueOf(i);
            int sum = 0;
            for(int j = 0; j < t.length(); j++) {
                sum += Integer.parseInt(t.substring(j, j+1));
            }

            if(sum >=a && sum <=b) {
                sumAll += i;
            }

        }
        System.out.println(sumAll);
    }
}