\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 r82782 = a;
double r82783 = b;
double r82784 = r82782 + r82783;
double r82785 = c;
double r82786 = r82784 + r82785;
double r82787 = 2.0;
double r82788 = r82786 / r82787;
double r82789 = r82788 - r82782;
double r82790 = r82788 * r82789;
double r82791 = r82788 - r82783;
double r82792 = r82790 * r82791;
double r82793 = r82788 - r82785;
double r82794 = r82792 * r82793;
double r82795 = sqrt(r82794);
return r82795;
}