\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 r73905 = a;
double r73906 = b;
double r73907 = r73905 + r73906;
double r73908 = c;
double r73909 = r73907 + r73908;
double r73910 = 2.0;
double r73911 = r73909 / r73910;
double r73912 = r73911 - r73905;
double r73913 = r73911 * r73912;
double r73914 = r73911 - r73906;
double r73915 = r73913 * r73914;
double r73916 = r73911 - r73908;
double r73917 = r73915 * r73916;
double r73918 = sqrt(r73917);
return r73918;
}