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 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int math(int a,int b);
int main(void){
    int A=0;
    int B=0;
    int ans=0;
    scanf("%d %d",&A,&B);
    ans=math(A,B);
    printf("%d",ans);
    return 0;
}

int math(int a,int b){
    int ANS=0;
    if(b%a==0){
        ANS=a+b;
    }else{
        ANS=b-a;
    }
    return ANS;
}