// editor1
#include<iostream>
using namespace std;
void calculateResult(int A, int B)
{
    if(A < 0 || B < 0)
    {
        cout<<"Invalid input";
        return;
    }
    if (A % 2 == 0 && B % 2 == 0)
    {
        cout<< A * B;
    }
    else if (A % B !=0 && B % 2 !=0)
{
    cout << A + B;
}
else
}
if (A>B)
cout<<A-B;
else
cout<<B-A;
}
}