\sqrt{\left(\left(\frac{\left(a + b\right) + c}{2} \cdot \left(\frac{\left(a + b\right) + c}{2} - a\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - b\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - c\right)}double f(double a, double b, double c) {
double r79442 = a;
double r79443 = b;
double r79444 = r79442 + r79443;
double r79445 = c;
double r79446 = r79444 + r79445;
double r79447 = 2.0;
double r79448 = r79446 / r79447;
double r79449 = r79448 - r79442;
double r79450 = r79448 * r79449;
double r79451 = r79448 - r79443;
double r79452 = r79450 * r79451;
double r79453 = r79448 - r79445;
double r79454 = r79452 * r79453;
double r79455 = sqrt(r79454);
return r79455;
}