#include
#include
double FUNCTION_Z(int a, int x);
int main()
{
int a, x;
std::cin >> a >> x;
double Z = FUNCTION_Z(a, x);
std::cout << "Z = " << Z << std::endl;<br>}
double FUNCTION_Z(int a, int x)
{
if (x > a)
return a*(x + sqrt(x));
else
return a - x*sqrt(x);
}