\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 r65595 = a;
double r65596 = b;
double r65597 = r65595 + r65596;
double r65598 = c;
double r65599 = r65597 + r65598;
double r65600 = 2.0;
double r65601 = r65599 / r65600;
double r65602 = r65601 - r65595;
double r65603 = r65601 * r65602;
double r65604 = r65601 - r65596;
double r65605 = r65603 * r65604;
double r65606 = r65601 - r65598;
double r65607 = r65605 * r65606;
double r65608 = sqrt(r65607);
return r65608;
}