Given the Following Code Fragment, What Is the Stopping Conditions)

Short Answer

Given the following code fragment, what is the stopping conditions)?
int f1int x, int y)
{
ifx<0 || y<0)
return x-y;
else
return f1x-1,y) + f1x,y-1);
}
int main)
{
cout << f11,2)<<endl;
return 0;
}