\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 r122409 = a;
double r122410 = b;
double r122411 = r122409 + r122410;
double r122412 = c;
double r122413 = r122411 + r122412;
double r122414 = 2.0;
double r122415 = r122413 / r122414;
double r122416 = r122415 - r122409;
double r122417 = r122415 * r122416;
double r122418 = r122415 - r122410;
double r122419 = r122417 * r122418;
double r122420 = r122415 - r122412;
double r122421 = r122419 * r122420;
double r122422 = sqrt(r122421);
return r122422;
}