\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 r111994 = a;
double r111995 = b;
double r111996 = r111994 + r111995;
double r111997 = c;
double r111998 = r111996 + r111997;
double r111999 = 2.0;
double r112000 = r111998 / r111999;
double r112001 = r112000 - r111994;
double r112002 = r112000 * r112001;
double r112003 = r112000 - r111995;
double r112004 = r112002 * r112003;
double r112005 = r112000 - r111997;
double r112006 = r112004 * r112005;
double r112007 = sqrt(r112006);
return r112007;
}