double f(double a, double b, double c) {
double r22301636 = a;
double r22301637 = b;
double r22301638 = r22301636 + r22301637;
double r22301639 = c;
double r22301640 = r22301638 + r22301639;
double r22301641 = 2.0;
double r22301642 = r22301640 / r22301641;
double r22301643 = r22301642 - r22301636;
double r22301644 = r22301642 * r22301643;
double r22301645 = r22301642 - r22301637;
double r22301646 = r22301644 * r22301645;
double r22301647 = r22301642 - r22301639;
double r22301648 = r22301646 * r22301647;
double r22301649 = sqrt(r22301648);
return r22301649;
}