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 Go (1.6) (judge verdict: Wrong Answer)

package main

import (
	"fmt"
	"log"
)

func main() {
	var n, a, b, total int
	fmt.Scanf("%d %d %d", &n, &a, &b)

	for i := 1; i < (n + 1); i++ {
		var x [3]int
		var y [3]int
		if i > 1000 {
			x[0] = i / 1000
			y[0] = i % 1000
		}
		if i > 100 {
			x[1] = i / 100
			y[1] = i % 100
		}

		x[2] = i / 10
		y[2] = i % 10

		res := x[0] + x[1] + x[2] + y[0] + y[1] + y[2]

		if res >= a && res <= b {
			total += i
			log.Printf("n = %d -> res:%d", i, res)

		}
	}
	fmt.Print(total)
}