\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 r98026 = a;
double r98027 = b;
double r98028 = r98026 + r98027;
double r98029 = c;
double r98030 = r98028 + r98029;
double r98031 = 2.0;
double r98032 = r98030 / r98031;
double r98033 = r98032 - r98026;
double r98034 = r98032 * r98033;
double r98035 = r98032 - r98027;
double r98036 = r98034 * r98035;
double r98037 = r98032 - r98029;
double r98038 = r98036 * r98037;
double r98039 = sqrt(r98038);
return r98039;
}