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 C# (.NET Core 3.1.201) (judge verdict: Wrong Answer)

using System;

public class a {
	static void Main(){
    	int[] AB = Array.ConvertAll(Console.ReadLine().Split(),int.Parse);
      	Console.WriteLine(AB[1]%AB[0]==0?AB[0]-AB[1]:AB[1]-AB[0]);
    }

}