Problem:
Score : 100 points

Problem Statement

You are given positive integers A and B.

If A is a divisor of B, print A + B; otherwise, print B - A.

Constraints

All values in input are integers.

1 \leq A \leq B \leq 20

Input

Input is given from Standard Input in the following format:

A B

Output

If A is a divisor of B, print A + B; otherwise, print B - A.

Sample Input 1

4 12

Sample Output 1

16

As 4 is a divisor of 12, 4 + 12 = 16 should be printed.

Sample Input 2

8 20

Sample Output 2

12

Sample Input 3

1 1

Sample Output 3

2

1 is a divisor of 1.

Solution in Scala (2.11.7) (judge verdict: Accepted)

import scala.math._
import scala.annotation._
import scala.collection._
import scala.collection.{mutable => mut}
import scala.util.control.Breaks.{breakable,break}

object Main {
  def main(args: Array[String]) {
    val sc = new java.util.Scanner(System.in)

    val a, b = sc.nextInt
    println(if(b % a == 0) a + b else b - a)
  }
}