\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 r124245 = a;
double r124246 = b;
double r124247 = r124245 + r124246;
double r124248 = c;
double r124249 = r124247 + r124248;
double r124250 = 2.0;
double r124251 = r124249 / r124250;
double r124252 = r124251 - r124245;
double r124253 = r124251 * r124252;
double r124254 = r124251 - r124246;
double r124255 = r124253 * r124254;
double r124256 = r124251 - r124248;
double r124257 = r124255 * r124256;
double r124258 = sqrt(r124257);
return r124258;
}