double f(double a, double b, double c) {
double r5146706 = a;
double r5146707 = b;
double r5146708 = r5146706 + r5146707;
double r5146709 = c;
double r5146710 = r5146708 + r5146709;
double r5146711 = 2.0;
double r5146712 = r5146710 / r5146711;
double r5146713 = r5146712 - r5146706;
double r5146714 = r5146712 * r5146713;
double r5146715 = r5146712 - r5146707;
double r5146716 = r5146714 * r5146715;
double r5146717 = r5146712 - r5146709;
double r5146718 = r5146716 * r5146717;
double r5146719 = sqrt(r5146718);
return r5146719;
}