\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 r15323 = a;
double r15324 = b;
double r15325 = r15323 + r15324;
double r15326 = c;
double r15327 = r15325 + r15326;
double r15328 = 2.0;
double r15329 = r15327 / r15328;
double r15330 = r15329 - r15323;
double r15331 = r15329 * r15330;
double r15332 = r15329 - r15324;
double r15333 = r15331 * r15332;
double r15334 = r15329 - r15326;
double r15335 = r15333 * r15334;
double r15336 = sqrt(r15335);
return r15336;
}