\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 r83345 = a;
double r83346 = b;
double r83347 = r83345 + r83346;
double r83348 = c;
double r83349 = r83347 + r83348;
double r83350 = 2.0;
double r83351 = r83349 / r83350;
double r83352 = r83351 - r83345;
double r83353 = r83351 * r83352;
double r83354 = r83351 - r83346;
double r83355 = r83353 * r83354;
double r83356 = r83351 - r83348;
double r83357 = r83355 * r83356;
double r83358 = sqrt(r83357);
return r83358;
}