\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 r122892 = a;
double r122893 = b;
double r122894 = r122892 + r122893;
double r122895 = c;
double r122896 = r122894 + r122895;
double r122897 = 2.0;
double r122898 = r122896 / r122897;
double r122899 = r122898 - r122892;
double r122900 = r122898 * r122899;
double r122901 = r122898 - r122893;
double r122902 = r122900 * r122901;
double r122903 = r122898 - r122895;
double r122904 = r122902 * r122903;
double r122905 = sqrt(r122904);
return r122905;
}